/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/Problem02_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:38:39,406 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:38:39,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:38:39,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:38:39,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:38:39,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:38:39,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:38:39,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:38:39,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:38:39,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:38:39,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:38:39,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:38:39,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:38:39,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:38:39,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:38:39,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:38:39,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:38:39,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:38:39,487 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 01:38:39,503 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:38:39,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:38:39,504 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:38:39,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:38:39,505 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:38:39,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:38:39,505 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:38:39,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:38:39,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:38:39,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:38:39,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:38:39,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:38:39,506 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:38:39,507 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:38:39,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:38:39,507 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:38:39,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:38:39,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:38:39,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:38:39,508 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:38:39,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:38:39,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:38:39,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:38:39,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:38:39,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:38:39,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:38:39,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:38:39,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:38:39,510 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 01:38:39,800 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:38:39,822 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:38:39,828 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:38:39,830 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:38:39,830 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:38:39,831 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label26.c [2019-11-07 01:38:39,906 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efcb0c880/50b49c710e1644c9ba65df543418e3f9/FLAG69ba43933 [2019-11-07 01:38:40,475 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:38:40,476 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label26.c [2019-11-07 01:38:40,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efcb0c880/50b49c710e1644c9ba65df543418e3f9/FLAG69ba43933 [2019-11-07 01:38:40,762 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efcb0c880/50b49c710e1644c9ba65df543418e3f9 [2019-11-07 01:38:40,771 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:38:40,772 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:38:40,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:38:40,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:38:40,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:38:40,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:38:40" (1/1) ... [2019-11-07 01:38:40,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9639fc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:40, skipping insertion in model container [2019-11-07 01:38:40,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:38:40" (1/1) ... [2019-11-07 01:38:40,789 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:38:40,845 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:38:41,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:38:41,363 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:38:41,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:38:41,554 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:38:41,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:41 WrapperNode [2019-11-07 01:38:41,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:38:41,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:38:41,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:38:41,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:38:41,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:41" (1/1) ... [2019-11-07 01:38:41,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:41" (1/1) ... [2019-11-07 01:38:41,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:41" (1/1) ... [2019-11-07 01:38:41,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:41" (1/1) ... [2019-11-07 01:38:41,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:41" (1/1) ... [2019-11-07 01:38:41,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:41" (1/1) ... [2019-11-07 01:38:41,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:41" (1/1) ... [2019-11-07 01:38:41,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:38:41,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:38:41,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:38:41,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:38:41,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:41" (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 01:38:41,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:38:41,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:38:41,727 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:38:41,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:38:41,728 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:38:41,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:38:41,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:38:41,728 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:38:41,729 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:38:41,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:38:41,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:38:44,004 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:38:44,004 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:38:44,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:38:44 BoogieIcfgContainer [2019-11-07 01:38:44,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:38:44,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:38:44,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:38:44,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:38:44,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:38:40" (1/3) ... [2019-11-07 01:38:44,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73766f52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:38:44, skipping insertion in model container [2019-11-07 01:38:44,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:41" (2/3) ... [2019-11-07 01:38:44,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73766f52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:38:44, skipping insertion in model container [2019-11-07 01:38:44,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:38:44" (3/3) ... [2019-11-07 01:38:44,026 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label26.c [2019-11-07 01:38:44,039 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:38:44,049 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:38:44,061 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:38:44,093 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:38:44,093 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:38:44,093 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:38:44,093 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:38:44,093 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:38:44,094 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:38:44,094 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:38:44,094 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:38:44,115 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-11-07 01:38:44,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-07 01:38:44,126 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:38:44,128 INFO L410 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] [2019-11-07 01:38:44,130 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:38:44,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:38:44,137 INFO L82 PathProgramCache]: Analyzing trace with hash -219356361, now seen corresponding path program 1 times [2019-11-07 01:38:44,146 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:38:44,146 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534521368] [2019-11-07 01:38:44,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:38:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:44,529 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 01:38:44,530 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534521368] [2019-11-07 01:38:44,531 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:38:44,531 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:38:44,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163381953] [2019-11-07 01:38:44,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:38:44,538 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:38:44,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:38:44,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:38:44,556 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-11-07 01:38:45,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:38:45,149 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-11-07 01:38:45,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:38:45,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-11-07 01:38:45,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:38:45,175 INFO L225 Difference]: With dead ends: 273 [2019-11-07 01:38:45,176 INFO L226 Difference]: Without dead ends: 175 [2019-11-07 01:38:45,183 INFO L630 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 [2019-11-07 01:38:45,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-07 01:38:45,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-11-07 01:38:45,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-07 01:38:45,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 327 transitions. [2019-11-07 01:38:45,297 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 327 transitions. Word has length 86 [2019-11-07 01:38:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:38:45,299 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 327 transitions. [2019-11-07 01:38:45,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:38:45,300 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 327 transitions. [2019-11-07 01:38:45,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-07 01:38:45,313 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:38:45,314 INFO L410 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] [2019-11-07 01:38:45,315 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:38:45,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:38:45,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1874051698, now seen corresponding path program 1 times [2019-11-07 01:38:45,316 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:38:45,316 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232460262] [2019-11-07 01:38:45,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:38:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:38:45,499 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232460262] [2019-11-07 01:38:45,499 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:38:45,499 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:38:45,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212016290] [2019-11-07 01:38:45,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:38:45,503 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:38:45,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:38:45,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:38:45,503 INFO L87 Difference]: Start difference. First operand 175 states and 327 transitions. Second operand 6 states. [2019-11-07 01:38:46,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:38:46,192 INFO L93 Difference]: Finished difference Result 547 states and 1064 transitions. [2019-11-07 01:38:46,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 01:38:46,193 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-11-07 01:38:46,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:38:46,199 INFO L225 Difference]: With dead ends: 547 [2019-11-07 01:38:46,199 INFO L226 Difference]: Without dead ends: 377 [2019-11-07 01:38:46,202 INFO L630 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 [2019-11-07 01:38:46,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2019-11-07 01:38:46,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 355. [2019-11-07 01:38:46,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-11-07 01:38:46,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 642 transitions. [2019-11-07 01:38:46,249 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 642 transitions. Word has length 101 [2019-11-07 01:38:46,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:38:46,250 INFO L462 AbstractCegarLoop]: Abstraction has 355 states and 642 transitions. [2019-11-07 01:38:46,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:38:46,250 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 642 transitions. [2019-11-07 01:38:46,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-07 01:38:46,252 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:38:46,253 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-11-07 01:38:46,253 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:38:46,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:38:46,253 INFO L82 PathProgramCache]: Analyzing trace with hash 750790761, now seen corresponding path program 1 times [2019-11-07 01:38:46,254 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:38:46,254 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799285629] [2019-11-07 01:38:46,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:38:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 01:38:46,420 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799285629] [2019-11-07 01:38:46,420 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976703457] [2019-11-07 01:38:46,420 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 01:38:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:46,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:38:46,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:38:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:38:46,607 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:38:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:38:46,697 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2106513770] [2019-11-07 01:38:46,754 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:38:46,755 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:38:46,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:38:46,769 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:38:46,770 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:38:46,996 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-11-07 01:38:48,163 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-11-07 01:38:54,901 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 57 [2019-11-07 01:38:55,337 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 17504 conjuctions. This might take some time... [2019-11-07 01:38:55,907 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 57 [2019-11-07 01:38:56,223 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 17504 conjuctions. This might take some time... [2019-11-07 01:38:57,183 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 57 [2019-11-07 01:38:57,420 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 17504 conjuctions. This might take some time... [2019-11-07 01:39:04,352 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-11-07 01:39:04,363 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:39:04,818 WARN L191 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2019-11-07 01:39:05,167 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2019-11-07 01:39:06,071 WARN L191 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 99 [2019-11-07 01:39:07,027 WARN L191 SmtUtils]: Spent 879.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 103 [2019-11-07 01:39:07,306 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-11-07 01:39:07,527 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2019-11-07 01:39:07,765 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2019-11-07 01:39:08,058 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 80 [2019-11-07 01:39:08,400 WARN L191 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 81 [2019-11-07 01:39:08,726 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 86 [2019-11-07 01:39:09,096 WARN L191 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2019-11-07 01:39:14,976 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:39:14,977 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 13] total 23 [2019-11-07 01:39:14,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042755809] [2019-11-07 01:39:14,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:39:14,980 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:39:14,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:39:14,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:39:14,981 INFO L87 Difference]: Start difference. First operand 355 states and 642 transitions. Second operand 23 states. [2019-11-07 01:39:15,187 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-07 01:39:15,723 WARN L191 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 103 [2019-11-07 01:39:16,469 WARN L191 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 116 [2019-11-07 01:39:17,261 WARN L191 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 107 [2019-11-07 01:39:17,617 WARN L191 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2019-11-07 01:39:17,972 WARN L191 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 93 [2019-11-07 01:39:18,294 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2019-11-07 01:39:18,542 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2019-11-07 01:39:21,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:39:21,915 INFO L93 Difference]: Finished difference Result 882 states and 1610 transitions. [2019-11-07 01:39:21,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-07 01:39:21,916 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2019-11-07 01:39:21,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:39:21,919 INFO L225 Difference]: With dead ends: 882 [2019-11-07 01:39:21,920 INFO L226 Difference]: Without dead ends: 532 [2019-11-07 01:39:21,922 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 239 SyntacticMatches, 81 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=302, Invalid=820, Unknown=0, NotChecked=0, Total=1122 [2019-11-07 01:39:21,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2019-11-07 01:39:21,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 520. [2019-11-07 01:39:21,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2019-11-07 01:39:21,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 788 transitions. [2019-11-07 01:39:21,956 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 788 transitions. Word has length 109 [2019-11-07 01:39:21,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:39:21,956 INFO L462 AbstractCegarLoop]: Abstraction has 520 states and 788 transitions. [2019-11-07 01:39:21,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:39:21,956 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 788 transitions. [2019-11-07 01:39:21,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-07 01:39:21,959 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:39:21,959 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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]