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_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:54:41,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:54:41,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:54:41,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:54:41,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:54:41,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:54:41,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:54:41,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:54:41,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:54:41,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:54:41,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:54:41,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:54:41,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:54:41,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:54:41,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:54:41,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:54:41,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:54:41,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:54:41,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:54:41,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:54:41,294 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 01:54:41,307 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:54:41,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:54:41,309 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:54:41,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:54:41,309 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:54:41,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:54:41,310 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:54:41,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:54:41,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:54:41,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:54:41,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:54:41,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:54:41,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:54:41,311 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:54:41,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:54:41,312 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:54:41,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:54:41,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:54:41,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:54:41,312 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:54:41,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:54:41,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:54:41,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:54:41,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:54:41,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:54:41,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:54:41,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:54:41,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:54:41,314 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 01:54:41,621 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:54:41,636 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:54:41,640 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:54:41,642 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:54:41,642 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:54:41,643 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label35.c [2019-10-15 01:54:41,713 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0756bbf76/b23f545fcde6451bb85f9e7efa0ea89c/FLAG3d7fd3545 [2019-10-15 01:54:42,397 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:54:42,399 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label35.c [2019-10-15 01:54:42,418 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0756bbf76/b23f545fcde6451bb85f9e7efa0ea89c/FLAG3d7fd3545 [2019-10-15 01:54:42,625 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0756bbf76/b23f545fcde6451bb85f9e7efa0ea89c [2019-10-15 01:54:42,635 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:54:42,636 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:54:42,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:54:42,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:54:42,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:54:42,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:54:42" (1/1) ... [2019-10-15 01:54:42,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7698cf5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:42, skipping insertion in model container [2019-10-15 01:54:42,645 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:54:42" (1/1) ... [2019-10-15 01:54:42,652 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:54:42,738 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:54:43,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:54:43,678 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:54:44,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:54:44,094 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:54:44,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:44 WrapperNode [2019-10-15 01:54:44,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:54:44,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:54:44,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:54:44,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:54:44,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:44" (1/1) ... [2019-10-15 01:54:44,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:44" (1/1) ... [2019-10-15 01:54:44,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:44" (1/1) ... [2019-10-15 01:54:44,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:44" (1/1) ... [2019-10-15 01:54:44,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:44" (1/1) ... [2019-10-15 01:54:44,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:44" (1/1) ... [2019-10-15 01:54:44,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:44" (1/1) ... [2019-10-15 01:54:44,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:54:44,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:54:44,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:54:44,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:54:44,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:44" (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 01:54:44,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:54:44,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:54:44,360 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:54:44,360 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:54:44,360 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:54:44,361 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:54:44,361 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:54:44,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:54:44,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:54:44,361 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:54:44,362 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:54:44,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:54:44,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:54:52,698 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:54:52,699 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:54:52,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:54:52 BoogieIcfgContainer [2019-10-15 01:54:52,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:54:52,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:54:52,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:54:52,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:54:52,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:54:42" (1/3) ... [2019-10-15 01:54:52,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ba5f86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:54:52, skipping insertion in model container [2019-10-15 01:54:52,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:44" (2/3) ... [2019-10-15 01:54:52,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ba5f86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:54:52, skipping insertion in model container [2019-10-15 01:54:52,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:54:52" (3/3) ... [2019-10-15 01:54:52,708 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label35.c [2019-10-15 01:54:52,716 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:54:52,729 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:54:52,741 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:54:52,775 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:54:52,775 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:54:52,775 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:54:52,775 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:54:52,776 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:54:52,776 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:54:52,776 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:54:52,776 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:54:52,800 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:54:52,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:54:52,806 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:54:52,807 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:54:52,809 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:54:52,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:54:52,815 INFO L82 PathProgramCache]: Analyzing trace with hash 648048493, now seen corresponding path program 1 times [2019-10-15 01:54:52,822 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:54:52,823 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872646116] [2019-10-15 01:54:52,823 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:52,823 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:52,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:54:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:53,040 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 01:54:53,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872646116] [2019-10-15 01:54:53,042 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:54:53,042 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:54:53,043 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911589256] [2019-10-15 01:54:53,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:54:53,047 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:54:53,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:54:53,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:54:53,064 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 4 states. [2019-10-15 01:54:57,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:54:57,207 INFO L93 Difference]: Finished difference Result 953 states and 1852 transitions. [2019-10-15 01:54:57,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:54:57,210 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 01:54:57,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:54:57,251 INFO L225 Difference]: With dead ends: 953 [2019-10-15 01:54:57,252 INFO L226 Difference]: Without dead ends: 702 [2019-10-15 01:54:57,266 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 01:54:57,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-10-15 01:54:57,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 430. [2019-10-15 01:54:57,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2019-10-15 01:54:57,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 821 transitions. [2019-10-15 01:54:57,366 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 821 transitions. Word has length 11 [2019-10-15 01:54:57,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:54:57,366 INFO L462 AbstractCegarLoop]: Abstraction has 430 states and 821 transitions. [2019-10-15 01:54:57,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:54:57,367 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 821 transitions. [2019-10-15 01:54:57,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:54:57,369 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:54:57,369 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 01:54:57,370 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:54:57,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:54:57,370 INFO L82 PathProgramCache]: Analyzing trace with hash 2143491309, now seen corresponding path program 1 times [2019-10-15 01:54:57,370 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:54:57,371 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90567066] [2019-10-15 01:54:57,371 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:57,371 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:57,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:54:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:57,533 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 01:54:57,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90567066] [2019-10-15 01:54:57,537 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:54:57,537 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:54:57,537 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131130552] [2019-10-15 01:54:57,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:54:57,540 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:54:57,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:54:57,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:54:57,541 INFO L87 Difference]: Start difference. First operand 430 states and 821 transitions. Second operand 4 states. [2019-10-15 01:55:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:01,888 INFO L93 Difference]: Finished difference Result 1699 states and 3298 transitions. [2019-10-15 01:55:01,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:55:01,889 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-15 01:55:01,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:01,897 INFO L225 Difference]: With dead ends: 1699 [2019-10-15 01:55:01,897 INFO L226 Difference]: Without dead ends: 1274 [2019-10-15 01:55:01,899 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 01:55:01,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2019-10-15 01:55:01,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1249. [2019-10-15 01:55:01,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1249 states. [2019-10-15 01:55:01,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 2074 transitions. [2019-10-15 01:55:01,963 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 2074 transitions. Word has length 21 [2019-10-15 01:55:01,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:01,964 INFO L462 AbstractCegarLoop]: Abstraction has 1249 states and 2074 transitions. [2019-10-15 01:55:01,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:55:01,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 2074 transitions. [2019-10-15 01:55:01,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-15 01:55:01,966 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:01,966 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:55:01,967 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:01,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:01,967 INFO L82 PathProgramCache]: Analyzing trace with hash 42067521, now seen corresponding path program 1 times [2019-10-15 01:55:01,967 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:01,968 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947546153] [2019-10-15 01:55:01,968 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:01,968 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:01,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:02,095 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 01:55:02,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947546153] [2019-10-15 01:55:02,096 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:02,096 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:55:02,096 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67197900] [2019-10-15 01:55:02,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:55:02,097 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:02,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:55:02,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:55:02,098 INFO L87 Difference]: Start difference. First operand 1249 states and 2074 transitions. Second operand 5 states. [2019-10-15 01:55:07,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:07,690 INFO L93 Difference]: Finished difference Result 3799 states and 6456 transitions. [2019-10-15 01:55:07,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:55:07,692 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2019-10-15 01:55:07,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:07,709 INFO L225 Difference]: With dead ends: 3799 [2019-10-15 01:55:07,709 INFO L226 Difference]: Without dead ends: 2555 [2019-10-15 01:55:07,714 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:55:07,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2019-10-15 01:55:07,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 2077. [2019-10-15 01:55:07,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2019-10-15 01:55:07,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 3109 transitions. [2019-10-15 01:55:07,814 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 3109 transitions. Word has length 38 [2019-10-15 01:55:07,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:07,814 INFO L462 AbstractCegarLoop]: Abstraction has 2077 states and 3109 transitions. [2019-10-15 01:55:07,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:55:07,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 3109 transitions. [2019-10-15 01:55:07,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-10-15 01:55:07,832 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:07,833 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:07,835 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:07,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:07,835 INFO L82 PathProgramCache]: Analyzing trace with hash -673927150, now seen corresponding path program 1 times [2019-10-15 01:55:07,835 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:07,836 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229919099] [2019-10-15 01:55:07,836 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:07,836 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:07,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:55:08,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229919099] [2019-10-15 01:55:08,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852444789] [2019-10-15 01:55:08,242 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 01:55:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:08,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:55:08,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:55:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:55:08,493 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:55:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:55:08,612 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1303336245] [2019-10-15 01:55:08,651 INFO L162 IcfgInterpreter]: Started Sifa with 148 locations of interest [2019-10-15 01:55:08,651 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:55:08,658 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:55:08,667 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:55:08,668 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:55:08,848 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2019-10-15 01:55:09,100 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2019-10-15 01:55:09,380 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5512 conjuctions. This might take some time... [2019-10-15 01:55:09,481 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2019-10-15 01:55:09,633 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5512 conjuctions. This might take some time... [2019-10-15 01:55:09,723 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 31 [2019-10-15 01:55:09,830 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7371 conjuctions. This might take some time... [2019-10-15 01:55:09,970 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 31 [2019-10-15 01:55:10,096 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7371 conjuctions. This might take some time... [2019-10-15 01:55:11,922 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 80 for LOIs [2019-10-15 01:55:11,998 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 32 [2019-10-15 01:55:17,555 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 67500 conjuctions. This might take some time...