/usr/bin/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/Problem15_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 02:02:00,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 02:02:00,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 02:02:00,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 02:02:00,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 02:02:00,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 02:02:00,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 02:02:00,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 02:02:00,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 02:02:00,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 02:02:00,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 02:02:00,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 02:02:00,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 02:02:00,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 02:02:00,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 02:02:00,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 02:02:00,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 02:02:00,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 02:02:00,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 02:02:00,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 02:02:00,301 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 [2019-11-07 02:02:00,329 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 02:02:00,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 02:02:00,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 02:02:00,331 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 02:02:00,331 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 02:02:00,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 02:02:00,331 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 02:02:00,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 02:02:00,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 02:02:00,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 02:02:00,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 02:02:00,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 02:02:00,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 02:02:00,333 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 02:02:00,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 02:02:00,333 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 02:02:00,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 02:02:00,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 02:02:00,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 02:02:00,334 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 02:02:00,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 02:02:00,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 02:02:00,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 02:02:00,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 02:02:00,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 02:02:00,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 02:02:00,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 02:02:00,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 02:02:00,335 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 [2019-11-07 02:02:00,630 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 02:02:00,644 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 02:02:00,648 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 02:02:00,649 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 02:02:00,649 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 02:02:00,650 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label44.c [2019-11-07 02:02:00,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75f124754/7b44c92d861b44089a97f7b7f10f1172/FLAG1cf290465 [2019-11-07 02:02:01,469 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 02:02:01,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label44.c [2019-11-07 02:02:01,490 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75f124754/7b44c92d861b44089a97f7b7f10f1172/FLAG1cf290465 [2019-11-07 02:02:01,623 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75f124754/7b44c92d861b44089a97f7b7f10f1172 [2019-11-07 02:02:01,643 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 02:02:01,645 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 02:02:01,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 02:02:01,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 02:02:01,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 02:02:01,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:01" (1/1) ... [2019-11-07 02:02:01,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@630fa84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:01, skipping insertion in model container [2019-11-07 02:02:01,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:01" (1/1) ... [2019-11-07 02:02:01,662 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 02:02:01,742 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 02:02:02,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 02:02:02,685 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 02:02:03,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 02:02:03,074 INFO L192 MainTranslator]: Completed translation [2019-11-07 02:02:03,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:03 WrapperNode [2019-11-07 02:02:03,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 02:02:03,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 02:02:03,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 02:02:03,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 02:02:03,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:03" (1/1) ... [2019-11-07 02:02:03,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:03" (1/1) ... [2019-11-07 02:02:03,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:03" (1/1) ... [2019-11-07 02:02:03,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:03" (1/1) ... [2019-11-07 02:02:03,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:03" (1/1) ... [2019-11-07 02:02:03,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:03" (1/1) ... [2019-11-07 02:02:03,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:03" (1/1) ... [2019-11-07 02:02:03,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 02:02:03,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 02:02:03,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 02:02:03,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 02:02:03,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:03" (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 [2019-11-07 02:02:03,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 02:02:03,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 02:02:03,354 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 02:02:03,354 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-07 02:02:03,354 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 02:02:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 02:02:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-07 02:02:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 02:02:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 02:02:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 02:02:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 02:02:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 02:02:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 02:02:12,707 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 02:02:12,708 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 02:02:12,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:02:12 BoogieIcfgContainer [2019-11-07 02:02:12,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 02:02:12,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 02:02:12,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 02:02:12,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 02:02:12,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:02:01" (1/3) ... [2019-11-07 02:02:12,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d122d11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:02:12, skipping insertion in model container [2019-11-07 02:02:12,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:03" (2/3) ... [2019-11-07 02:02:12,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d122d11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:02:12, skipping insertion in model container [2019-11-07 02:02:12,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:02:12" (3/3) ... [2019-11-07 02:02:12,735 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label44.c [2019-11-07 02:02:12,748 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 02:02:12,759 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 02:02:12,772 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 02:02:12,817 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 02:02:12,819 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 02:02:12,819 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 02:02:12,819 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 02:02:12,819 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 02:02:12,819 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 02:02:12,820 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 02:02:12,820 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 02:02:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states. [2019-11-07 02:02:12,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-07 02:02:12,864 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:02:12,865 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:02:12,867 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:02:12,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:02:12,873 INFO L82 PathProgramCache]: Analyzing trace with hash 648057134, now seen corresponding path program 1 times [2019-11-07 02:02:12,884 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:02:12,884 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700068347] [2019-11-07 02:02:12,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:02:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:02:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:02:13,207 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700068347] [2019-11-07 02:02:13,208 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 02:02:13,208 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 02:02:13,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515827726] [2019-11-07 02:02:13,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 02:02:13,215 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:02:13,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 02:02:13,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 02:02:13,233 INFO L87 Difference]: Start difference. First operand 243 states. Second operand 4 states. [2019-11-07 02:02:17,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:02:17,539 INFO L93 Difference]: Finished difference Result 949 states and 1846 transitions. [2019-11-07 02:02:17,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 02:02:17,541 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-07 02:02:17,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:02:17,574 INFO L225 Difference]: With dead ends: 949 [2019-11-07 02:02:17,574 INFO L226 Difference]: Without dead ends: 699 [2019-11-07 02:02:17,584 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 02:02:17,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2019-11-07 02:02:17,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 467. [2019-11-07 02:02:17,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2019-11-07 02:02:17,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 742 transitions. [2019-11-07 02:02:17,698 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 742 transitions. Word has length 11 [2019-11-07 02:02:17,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:02:17,698 INFO L462 AbstractCegarLoop]: Abstraction has 467 states and 742 transitions. [2019-11-07 02:02:17,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 02:02:17,699 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 742 transitions. [2019-11-07 02:02:17,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-07 02:02:17,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:02:17,702 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:02:17,702 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:02:17,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:02:17,703 INFO L82 PathProgramCache]: Analyzing trace with hash 2085380344, now seen corresponding path program 1 times [2019-11-07 02:02:17,703 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:02:17,703 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132909724] [2019-11-07 02:02:17,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:02:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:02:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:02:17,864 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132909724] [2019-11-07 02:02:17,864 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 02:02:17,864 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 02:02:17,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427969292] [2019-11-07 02:02:17,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 02:02:17,867 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:02:17,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 02:02:17,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 02:02:17,868 INFO L87 Difference]: Start difference. First operand 467 states and 742 transitions. Second operand 4 states. [2019-11-07 02:02:22,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:02:22,061 INFO L93 Difference]: Finished difference Result 1847 states and 2973 transitions. [2019-11-07 02:02:22,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 02:02:22,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-11-07 02:02:22,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:02:22,071 INFO L225 Difference]: With dead ends: 1847 [2019-11-07 02:02:22,072 INFO L226 Difference]: Without dead ends: 1385 [2019-11-07 02:02:22,074 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 02:02:22,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2019-11-07 02:02:22,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1142. [2019-11-07 02:02:22,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1142 states. [2019-11-07 02:02:22,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1673 transitions. [2019-11-07 02:02:22,124 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1673 transitions. Word has length 20 [2019-11-07 02:02:22,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:02:22,124 INFO L462 AbstractCegarLoop]: Abstraction has 1142 states and 1673 transitions. [2019-11-07 02:02:22,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 02:02:22,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1673 transitions. [2019-11-07 02:02:22,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-07 02:02:22,129 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:02:22,129 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-07 02:02:22,129 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:02:22,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:02:22,130 INFO L82 PathProgramCache]: Analyzing trace with hash -543778070, now seen corresponding path program 1 times [2019-11-07 02:02:22,130 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:02:22,130 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006179080] [2019-11-07 02:02:22,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:02:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:02:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 02:02:22,340 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006179080] [2019-11-07 02:02:22,341 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665707426] [2019-11-07 02:02:22,341 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 [2019-11-07 02:02:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:02:22,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 02:02:22,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 02:02:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 02:02:22,634 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 02:02:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 23 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 02:02:22,801 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1724615548] [2019-11-07 02:02:22,849 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2019-11-07 02:02:22,850 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 02:02:22,856 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 02:02:22,864 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 02:02:22,865 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 02:02:23,008 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 58 for LOIs [2019-11-07 02:02:23,057 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 60 [2019-11-07 02:02:23,619 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5870 conjuctions. This might take some time... [2019-11-07 02:02:23,691 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 60 [2019-11-07 02:02:24,026 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5870 conjuctions. This might take some time... [2019-11-07 02:02:24,709 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 80 for LOIs [2019-11-07 02:02:24,726 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 62 [2019-11-07 02:02:35,888 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 75252 conjuctions. This might take some time...