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/Problem01_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 00:57:09,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 00:57:09,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 00:57:09,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-07 00:57:09,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 00:57:09,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 00:57:09,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 00:57:09,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 00:57:09,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 00:57:09,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 00:57:09,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 00:57:09,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 00:57:09,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 00:57:09,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 00:57:09,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 00:57:09,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 00:57:09,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 00:57:09,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 00:57:09,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 00:57:09,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 00:57:09,947 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 [2019-10-07 00:57:09,968 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 00:57:09,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 00:57:09,970 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 00:57:09,971 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 00:57:09,971 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 00:57:09,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 00:57:09,971 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 00:57:09,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 00:57:09,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 00:57:09,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 00:57:09,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 00:57:09,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 00:57:09,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 00:57:09,974 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 00:57:09,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 00:57:09,974 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 00:57:09,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 00:57:09,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 00:57:09,975 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 00:57:09,975 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 00:57:09,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 00:57:09,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 00:57:09,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 00:57:09,976 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 00:57:09,976 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 00:57:09,976 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 00:57:09,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 00:57:09,977 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 00:57:09,977 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 [2019-10-07 00:57:10,337 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 00:57:10,355 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 00:57:10,359 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 00:57:10,361 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 00:57:10,361 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 00:57:10,362 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label57.c [2019-10-07 00:57:10,438 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b67965f5a/3fc30491edec4a118a4b8a8ca373aece/FLAGb0e8d0ea0 [2019-10-07 00:57:11,046 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 00:57:11,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label57.c [2019-10-07 00:57:11,069 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b67965f5a/3fc30491edec4a118a4b8a8ca373aece/FLAGb0e8d0ea0 [2019-10-07 00:57:11,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b67965f5a/3fc30491edec4a118a4b8a8ca373aece [2019-10-07 00:57:11,288 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 00:57:11,291 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 00:57:11,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 00:57:11,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 00:57:11,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 00:57:11,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 12:57:11" (1/1) ... [2019-10-07 00:57:11,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23a06f24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:11, skipping insertion in model container [2019-10-07 00:57:11,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 12:57:11" (1/1) ... [2019-10-07 00:57:11,309 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 00:57:11,354 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 00:57:11,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 00:57:11,883 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 00:57:12,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 00:57:12,097 INFO L192 MainTranslator]: Completed translation [2019-10-07 00:57:12,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:12 WrapperNode [2019-10-07 00:57:12,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 00:57:12,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 00:57:12,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 00:57:12,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 00:57:12,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:12" (1/1) ... [2019-10-07 00:57:12,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:12" (1/1) ... [2019-10-07 00:57:12,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:12" (1/1) ... [2019-10-07 00:57:12,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:12" (1/1) ... [2019-10-07 00:57:12,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:12" (1/1) ... [2019-10-07 00:57:12,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:12" (1/1) ... [2019-10-07 00:57:12,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:12" (1/1) ... [2019-10-07 00:57:12,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 00:57:12,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 00:57:12,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 00:57:12,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 00:57:12,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:12" (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 [2019-10-07 00:57:12,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 00:57:12,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 00:57:12,273 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-07 00:57:12,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 00:57:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-07 00:57:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 00:57:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 00:57:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 00:57:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 00:57:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 00:57:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 00:57:14,199 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 00:57:14,200 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 00:57:14,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 12:57:14 BoogieIcfgContainer [2019-10-07 00:57:14,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 00:57:14,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 00:57:14,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 00:57:14,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 00:57:14,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 12:57:11" (1/3) ... [2019-10-07 00:57:14,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555f16d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 12:57:14, skipping insertion in model container [2019-10-07 00:57:14,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:12" (2/3) ... [2019-10-07 00:57:14,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555f16d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 12:57:14, skipping insertion in model container [2019-10-07 00:57:14,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 12:57:14" (3/3) ... [2019-10-07 00:57:14,211 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label57.c [2019-10-07 00:57:14,222 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 00:57:14,231 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 00:57:14,243 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 00:57:14,271 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 00:57:14,271 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 00:57:14,272 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 00:57:14,272 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 00:57:14,272 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 00:57:14,272 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 00:57:14,272 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 00:57:14,272 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 00:57:14,294 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2019-10-07 00:57:14,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-07 00:57:14,304 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:57:14,305 INFO L385 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] [2019-10-07 00:57:14,307 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:57:14,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:57:14,314 INFO L82 PathProgramCache]: Analyzing trace with hash 826786825, now seen corresponding path program 1 times [2019-10-07 00:57:14,323 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:57:14,323 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:14,323 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:14,324 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:14,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:57:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:57:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:57:14,852 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:14,853 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:57:14,853 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 00:57:14,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 00:57:14,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 00:57:14,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 00:57:14,875 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2019-10-07 00:57:15,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:57:15,451 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2019-10-07 00:57:15,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 00:57:15,453 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2019-10-07 00:57:15,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:57:15,468 INFO L225 Difference]: With dead ends: 246 [2019-10-07 00:57:15,468 INFO L226 Difference]: Without dead ends: 157 [2019-10-07 00:57:15,473 INFO L606 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 [2019-10-07 00:57:15,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-07 00:57:15,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-10-07 00:57:15,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-07 00:57:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 291 transitions. [2019-10-07 00:57:15,536 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 291 transitions. Word has length 77 [2019-10-07 00:57:15,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:57:15,537 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 291 transitions. [2019-10-07 00:57:15,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 00:57:15,537 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 291 transitions. [2019-10-07 00:57:15,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-07 00:57:15,543 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:57:15,543 INFO L385 BasicCegarLoop]: trace histogram [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] [2019-10-07 00:57:15,543 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:57:15,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:57:15,544 INFO L82 PathProgramCache]: Analyzing trace with hash 579761776, now seen corresponding path program 1 times [2019-10-07 00:57:15,544 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:57:15,544 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:15,545 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:15,545 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:15,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:57:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:57:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:57:15,714 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:15,714 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:57:15,714 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 00:57:15,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 00:57:15,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 00:57:15,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 00:57:15,717 INFO L87 Difference]: Start difference. First operand 157 states and 291 transitions. Second operand 4 states. [2019-10-07 00:57:16,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:57:16,489 INFO L93 Difference]: Finished difference Result 534 states and 1025 transitions. [2019-10-07 00:57:16,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 00:57:16,491 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2019-10-07 00:57:16,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:57:16,506 INFO L225 Difference]: With dead ends: 534 [2019-10-07 00:57:16,507 INFO L226 Difference]: Without dead ends: 382 [2019-10-07 00:57:16,510 INFO L606 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 [2019-10-07 00:57:16,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2019-10-07 00:57:16,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 307. [2019-10-07 00:57:16,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2019-10-07 00:57:16,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 535 transitions. [2019-10-07 00:57:16,554 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 535 transitions. Word has length 94 [2019-10-07 00:57:16,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:57:16,555 INFO L462 AbstractCegarLoop]: Abstraction has 307 states and 535 transitions. [2019-10-07 00:57:16,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 00:57:16,555 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 535 transitions. [2019-10-07 00:57:16,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-07 00:57:16,564 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:57:16,566 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:57:16,566 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:57:16,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:57:16,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1740751504, now seen corresponding path program 1 times [2019-10-07 00:57:16,567 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:57:16,567 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:16,567 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:16,567 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:16,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:57:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:57:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:57:16,764 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:16,765 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:57:16,765 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 00:57:16,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 00:57:16,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 00:57:16,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 00:57:16,766 INFO L87 Difference]: Start difference. First operand 307 states and 535 transitions. Second operand 3 states. [2019-10-07 00:57:17,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:57:17,175 INFO L93 Difference]: Finished difference Result 909 states and 1630 transitions. [2019-10-07 00:57:17,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 00:57:17,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2019-10-07 00:57:17,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:57:17,185 INFO L225 Difference]: With dead ends: 909 [2019-10-07 00:57:17,185 INFO L226 Difference]: Without dead ends: 607 [2019-10-07 00:57:17,188 INFO L606 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 [2019-10-07 00:57:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-10-07 00:57:17,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 457. [2019-10-07 00:57:17,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2019-10-07 00:57:17,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 740 transitions. [2019-10-07 00:57:17,223 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 740 transitions. Word has length 111 [2019-10-07 00:57:17,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:57:17,224 INFO L462 AbstractCegarLoop]: Abstraction has 457 states and 740 transitions. [2019-10-07 00:57:17,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 00:57:17,224 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 740 transitions. [2019-10-07 00:57:17,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-07 00:57:17,229 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:57:17,229 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:57:17,229 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:57:17,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:57:17,230 INFO L82 PathProgramCache]: Analyzing trace with hash 315219752, now seen corresponding path program 1 times [2019-10-07 00:57:17,230 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:57:17,230 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:17,230 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:17,230 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:17,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:57:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:57:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:57:17,423 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:17,424 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:57:17,424 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 00:57:17,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 00:57:17,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 00:57:17,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 00:57:17,425 INFO L87 Difference]: Start difference. First operand 457 states and 740 transitions. Second operand 6 states. [2019-10-07 00:57:18,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:57:18,068 INFO L93 Difference]: Finished difference Result 1245 states and 2039 transitions. [2019-10-07 00:57:18,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 00:57:18,069 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 147 [2019-10-07 00:57:18,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:57:18,076 INFO L225 Difference]: With dead ends: 1245 [2019-10-07 00:57:18,077 INFO L226 Difference]: Without dead ends: 793 [2019-10-07 00:57:18,079 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-07 00:57:18,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2019-10-07 00:57:18,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 706. [2019-10-07 00:57:18,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2019-10-07 00:57:18,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1058 transitions. [2019-10-07 00:57:18,133 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1058 transitions. Word has length 147 [2019-10-07 00:57:18,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:57:18,133 INFO L462 AbstractCegarLoop]: Abstraction has 706 states and 1058 transitions. [2019-10-07 00:57:18,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 00:57:18,134 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1058 transitions. [2019-10-07 00:57:18,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-07 00:57:18,139 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:57:18,140 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-07 00:57:18,140 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:57:18,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:57:18,141 INFO L82 PathProgramCache]: Analyzing trace with hash -757828653, now seen corresponding path program 1 times [2019-10-07 00:57:18,141 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:57:18,141 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:18,141 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:18,142 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:18,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:57:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:57:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 79 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 00:57:18,368 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:18,368 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 00:57:18,369 INFO L95 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 [2019-10-07 00:57:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:57:18,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-07 00:57:18,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 00:57:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-10-07 00:57:18,609 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 00:57:18,842 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2019-10-07 00:57:18,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 00:57:18,903 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 00:57:18,905 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 00:57:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 79 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 00:57:19,127 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 00:57:19,128 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-07 00:57:19,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 00:57:19,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 00:57:19,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-07 00:57:19,129 INFO L87 Difference]: Start difference. First operand 706 states and 1058 transitions. Second operand 5 states. [2019-10-07 00:57:19,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:57:19,836 INFO L93 Difference]: Finished difference Result 1909 states and 2948 transitions. [2019-10-07 00:57:19,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 00:57:19,837 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 162 [2019-10-07 00:57:19,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:57:19,850 INFO L225 Difference]: With dead ends: 1909 [2019-10-07 00:57:19,850 INFO L226 Difference]: Without dead ends: 1046 [2019-10-07 00:57:19,855 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-10-07 00:57:19,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2019-10-07 00:57:19,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1026. [2019-10-07 00:57:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1026 states. [2019-10-07 00:57:19,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1309 transitions. [2019-10-07 00:57:19,927 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1309 transitions. Word has length 162 [2019-10-07 00:57:19,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:57:19,928 INFO L462 AbstractCegarLoop]: Abstraction has 1026 states and 1309 transitions. [2019-10-07 00:57:19,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 00:57:19,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1309 transitions. [2019-10-07 00:57:19,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-07 00:57:19,934 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:57:19,934 INFO L385 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-07 00:57:20,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 00:57:20,141 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:57:20,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:57:20,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1536994840, now seen corresponding path program 1 times [2019-10-07 00:57:20,142 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:57:20,143 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:20,143 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:20,143 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:20,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:57:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:57:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 94 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 00:57:20,273 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:20,273 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 00:57:20,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 00:57:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:57:20,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-07 00:57:20,411 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 00:57:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-10-07 00:57:20,579 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 00:57:20,768 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2019-10-07 00:57:20,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 00:57:20,814 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 00:57:20,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 00:57:20,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 00:57:20,817 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 00:57:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 94 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 00:57:20,950 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 00:57:20,985 INFO L162 IcfgInterpreter]: Started Sifa with 81 locations of interest [2019-10-07 00:57:20,985 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 00:57:20,992 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 00:57:21,000 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 00:57:21,001 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 00:57:21,295 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 104 for LOIs [2019-10-07 00:57:21,782 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 00:57:21,783 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:178) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:169) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-07 00:57:21,793 INFO L168 Benchmark]: Toolchain (without parser) took 10500.87 ms. Allocated memory was 135.8 MB in the beginning and 421.5 MB in the end (delta: 285.7 MB). Free memory was 96.5 MB in the beginning and 374.9 MB in the end (delta: -278.4 MB). Peak memory consumption was 7.3 MB. Max. memory is 7.1 GB. [2019-10-07 00:57:21,801 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 135.8 MB. Free memory is still 117.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-10-07 00:57:21,804 INFO L168 Benchmark]: CACSL2BoogieTranslator took 806.25 ms. Allocated memory was 135.8 MB in the beginning and 202.4 MB in the end (delta: 66.6 MB). Free memory was 96.1 MB in the beginning and 166.8 MB in the end (delta: -70.7 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. [2019-10-07 00:57:21,806 INFO L168 Benchmark]: Boogie Preprocessor took 105.67 ms. Allocated memory is still 202.4 MB. Free memory was 166.8 MB in the beginning and 161.3 MB in the end (delta: 5.5 MB). Peak memory consumption was 5.5 MB. Max. memory is 7.1 GB. [2019-10-07 00:57:21,807 INFO L168 Benchmark]: RCFGBuilder took 1995.89 ms. Allocated memory was 202.4 MB in the beginning and 260.0 MB in the end (delta: 57.7 MB). Free memory was 161.3 MB in the beginning and 225.8 MB in the end (delta: -64.5 MB). Peak memory consumption was 116.2 MB. Max. memory is 7.1 GB. [2019-10-07 00:57:21,810 INFO L168 Benchmark]: TraceAbstraction took 7586.79 ms. Allocated memory was 260.0 MB in the beginning and 421.5 MB in the end (delta: 161.5 MB). Free memory was 225.8 MB in the beginning and 374.9 MB in the end (delta: -149.1 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2019-10-07 00:57:21,819 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 135.8 MB. Free memory is still 117.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 806.25 ms. Allocated memory was 135.8 MB in the beginning and 202.4 MB in the end (delta: 66.6 MB). Free memory was 96.1 MB in the beginning and 166.8 MB in the end (delta: -70.7 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.67 ms. Allocated memory is still 202.4 MB. Free memory was 166.8 MB in the beginning and 161.3 MB in the end (delta: 5.5 MB). Peak memory consumption was 5.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1995.89 ms. Allocated memory was 202.4 MB in the beginning and 260.0 MB in the end (delta: 57.7 MB). Free memory was 161.3 MB in the beginning and 225.8 MB in the end (delta: -64.5 MB). Peak memory consumption was 116.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7586.79 ms. Allocated memory was 260.0 MB in the beginning and 421.5 MB in the end (delta: 161.5 MB). Free memory was 225.8 MB in the beginning and 374.9 MB in the end (delta: -149.1 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...