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_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:55:14,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:55:14,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:55:14,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:55:14,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:55:14,811 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:55:14,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:55:14,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:55:14,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:55:14,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:55:14,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:55:14,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:55:14,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:55:14,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:55:14,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:55:14,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:55:14,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:55:14,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:55:14,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:55:14,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:55:14,836 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 01:55:14,860 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:55:14,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:55:14,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:55:14,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:55:14,862 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:55:14,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:55:14,863 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:55:14,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:55:14,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:55:14,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:55:14,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:55:14,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:55:14,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:55:14,864 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:55:14,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:55:14,864 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:55:14,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:55:14,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:55:14,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:55:14,865 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:55:14,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:55:14,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:55:14,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:55:14,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:55:14,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:55:14,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:55:14,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:55:14,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:55:14,867 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 01:55:15,123 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:55:15,141 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:55:15,145 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:55:15,146 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:55:15,147 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:55:15,147 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label55.c [2019-10-15 01:55:15,224 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a472f2beb/7946e9c922b0421eb09bad7810ff6a92/FLAG0933906cd [2019-10-15 01:55:15,907 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:55:15,909 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label55.c [2019-10-15 01:55:15,926 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a472f2beb/7946e9c922b0421eb09bad7810ff6a92/FLAG0933906cd [2019-10-15 01:55:16,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a472f2beb/7946e9c922b0421eb09bad7810ff6a92 [2019-10-15 01:55:16,075 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:55:16,076 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:55:16,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:55:16,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:55:16,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:55:16,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:55:16" (1/1) ... [2019-10-15 01:55:16,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53ed5976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:16, skipping insertion in model container [2019-10-15 01:55:16,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:55:16" (1/1) ... [2019-10-15 01:55:16,092 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:55:16,166 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:55:17,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:55:17,013 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:55:17,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:55:17,331 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:55:17,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:17 WrapperNode [2019-10-15 01:55:17,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:55:17,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:55:17,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:55:17,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:55:17,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:17" (1/1) ... [2019-10-15 01:55:17,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:17" (1/1) ... [2019-10-15 01:55:17,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:17" (1/1) ... [2019-10-15 01:55:17,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:17" (1/1) ... [2019-10-15 01:55:17,478 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:17" (1/1) ... [2019-10-15 01:55:17,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:17" (1/1) ... [2019-10-15 01:55:17,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:17" (1/1) ... [2019-10-15 01:55:17,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:55:17,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:55:17,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:55:17,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:55:17,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:17" (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 01:55:17,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:55:17,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:55:17,621 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:55:17,621 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:55:17,621 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:55:17,622 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:55:17,622 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:55:17,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:55:17,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:55:17,623 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:55:17,623 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:55:17,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:55:17,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:55:28,214 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:55:28,214 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:55:28,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:55:28 BoogieIcfgContainer [2019-10-15 01:55:28,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:55:28,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:55:28,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:55:28,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:55:28,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:55:16" (1/3) ... [2019-10-15 01:55:28,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31878543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:55:28, skipping insertion in model container [2019-10-15 01:55:28,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:17" (2/3) ... [2019-10-15 01:55:28,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31878543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:55:28, skipping insertion in model container [2019-10-15 01:55:28,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:55:28" (3/3) ... [2019-10-15 01:55:28,225 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label55.c [2019-10-15 01:55:28,235 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:55:28,241 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:55:28,251 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:55:28,278 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:55:28,278 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:55:28,278 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:55:28,279 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:55:28,279 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:55:28,279 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:55:28,279 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:55:28,279 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:55:28,304 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:55:28,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:55:28,309 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:28,310 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:28,312 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:28,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:28,318 INFO L82 PathProgramCache]: Analyzing trace with hash 648053869, now seen corresponding path program 1 times [2019-10-15 01:55:28,326 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:28,326 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73918516] [2019-10-15 01:55:28,327 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:28,327 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:28,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:28,621 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 01:55:28,622 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73918516] [2019-10-15 01:55:28,623 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:28,624 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:55:28,624 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394368090] [2019-10-15 01:55:28,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:55:28,630 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:28,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:55:28,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:55:28,647 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 4 states. [2019-10-15 01:55:33,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:33,093 INFO L93 Difference]: Finished difference Result 953 states and 1850 transitions. [2019-10-15 01:55:33,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:55:33,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 01:55:33,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:33,119 INFO L225 Difference]: With dead ends: 953 [2019-10-15 01:55:33,119 INFO L226 Difference]: Without dead ends: 702 [2019-10-15 01:55:33,129 INFO L600 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 [2019-10-15 01:55:33,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-10-15 01:55:33,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 469. [2019-10-15 01:55:33,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2019-10-15 01:55:33,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 744 transitions. [2019-10-15 01:55:33,219 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 744 transitions. Word has length 11 [2019-10-15 01:55:33,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:33,219 INFO L462 AbstractCegarLoop]: Abstraction has 469 states and 744 transitions. [2019-10-15 01:55:33,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:55:33,220 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 744 transitions. [2019-10-15 01:55:33,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:55:33,222 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:33,223 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:33,223 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:33,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:33,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1940410299, now seen corresponding path program 1 times [2019-10-15 01:55:33,224 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:33,224 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536078182] [2019-10-15 01:55:33,224 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:33,224 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:33,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:33,324 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536078182] [2019-10-15 01:55:33,324 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:33,324 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:55:33,324 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618231204] [2019-10-15 01:55:33,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:55:33,326 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:33,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:55:33,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:55:33,327 INFO L87 Difference]: Start difference. First operand 469 states and 744 transitions. Second operand 4 states. [2019-10-15 01:55:37,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:37,633 INFO L93 Difference]: Finished difference Result 1855 states and 2982 transitions. [2019-10-15 01:55:37,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:55:37,634 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-15 01:55:37,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:37,644 INFO L225 Difference]: With dead ends: 1855 [2019-10-15 01:55:37,645 INFO L226 Difference]: Without dead ends: 1391 [2019-10-15 01:55:37,647 INFO L600 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 [2019-10-15 01:55:37,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2019-10-15 01:55:37,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1376. [2019-10-15 01:55:37,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1376 states. [2019-10-15 01:55:37,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 1950 transitions. [2019-10-15 01:55:37,712 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 1950 transitions. Word has length 21 [2019-10-15 01:55:37,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:37,712 INFO L462 AbstractCegarLoop]: Abstraction has 1376 states and 1950 transitions. [2019-10-15 01:55:37,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:55:37,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 1950 transitions. [2019-10-15 01:55:37,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-15 01:55:37,715 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:37,716 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-15 01:55:37,716 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:37,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:37,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1601736320, now seen corresponding path program 1 times [2019-10-15 01:55:37,717 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:37,717 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202888150] [2019-10-15 01:55:37,717 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:37,717 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:37,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:37,870 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:55:37,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202888150] [2019-10-15 01:55:37,871 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:37,871 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:55:37,871 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219468268] [2019-10-15 01:55:37,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:55:37,872 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:37,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:55:37,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:55:37,873 INFO L87 Difference]: Start difference. First operand 1376 states and 1950 transitions. Second operand 5 states. [2019-10-15 01:55:42,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:42,125 INFO L93 Difference]: Finished difference Result 3939 states and 5736 transitions. [2019-10-15 01:55:42,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:55:42,127 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2019-10-15 01:55:42,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:42,150 INFO L225 Difference]: With dead ends: 3939 [2019-10-15 01:55:42,152 INFO L226 Difference]: Without dead ends: 2568 [2019-10-15 01:55:42,156 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:55:42,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2019-10-15 01:55:42,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 1878. [2019-10-15 01:55:42,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1878 states. [2019-10-15 01:55:42,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 2582 transitions. [2019-10-15 01:55:42,221 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 2582 transitions. Word has length 67 [2019-10-15 01:55:42,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:42,222 INFO L462 AbstractCegarLoop]: Abstraction has 1878 states and 2582 transitions. [2019-10-15 01:55:42,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:55:42,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 2582 transitions. [2019-10-15 01:55:42,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-10-15 01:55:42,229 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:42,230 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:42,230 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:42,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:42,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1394231609, now seen corresponding path program 1 times [2019-10-15 01:55:42,230 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:42,231 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743820396] [2019-10-15 01:55:42,231 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:42,231 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:42,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:55:42,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743820396] [2019-10-15 01:55:42,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948810954] [2019-10-15 01:55:42,484 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 01:55:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:42,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:55:42,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:55:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:55:42,722 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:55:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:55:42,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [99338913] [2019-10-15 01:55:42,911 INFO L162 IcfgInterpreter]: Started Sifa with 148 locations of interest [2019-10-15 01:55:42,912 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:55:42,919 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:55:42,928 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:55:42,929 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:55:43,121 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2019-10-15 01:55:43,405 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 51 [2019-10-15 01:55:43,899 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 10988 conjuctions. This might take some time... [2019-10-15 01:55:44,036 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 51 [2019-10-15 01:55:44,377 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 10988 conjuctions. This might take some time... [2019-10-15 01:55:44,487 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2019-10-15 01:55:44,501 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2019-10-15 01:55:45,917 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 80 for LOIs [2019-10-15 01:55:46,026 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 53