java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 00:58:19,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 00:58:19,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 00:58:19,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-07 00:58:19,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 00:58:19,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 00:58:19,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 00:58:19,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 00:58:19,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 00:58:19,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 00:58:19,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 00:58:19,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 00:58:19,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 00:58:19,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 00:58:19,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 00:58:19,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 00:58:19,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 00:58:19,926 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 00:58:19,927 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 00:58:19,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 00:58:19,928 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 00:58:19,943 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 00:58:19,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 00:58:19,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 00:58:19,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 00:58:19,945 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 00:58:19,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 00:58:19,945 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 00:58:19,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 00:58:19,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 00:58:19,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 00:58:19,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 00:58:19,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 00:58:19,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 00:58:19,946 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 00:58:19,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 00:58:19,947 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 00:58:19,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 00:58:19,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 00:58:19,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 00:58:19,948 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 00:58:19,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 00:58:19,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 00:58:19,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 00:58:19,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 00:58:19,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 00:58:19,949 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 00:58:19,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 00:58:19,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 00:58:19,949 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 00:58:20,223 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 00:58:20,243 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 00:58:20,245 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 00:58:20,246 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 00:58:20,246 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 00:58:20,247 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label50.c [2019-10-07 00:58:20,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58a5fe538/f3ef465228d74b6388c579b2864dbe91/FLAG0e9e45443 [2019-10-07 00:58:20,875 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 00:58:20,876 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label50.c [2019-10-07 00:58:20,895 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58a5fe538/f3ef465228d74b6388c579b2864dbe91/FLAG0e9e45443 [2019-10-07 00:58:21,132 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58a5fe538/f3ef465228d74b6388c579b2864dbe91 [2019-10-07 00:58:21,141 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 00:58:21,143 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 00:58:21,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 00:58:21,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 00:58:21,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 00:58:21,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 12:58:21" (1/1) ... [2019-10-07 00:58:21,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@799252b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:21, skipping insertion in model container [2019-10-07 00:58:21,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 12:58:21" (1/1) ... [2019-10-07 00:58:21,157 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 00:58:21,220 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 00:58:21,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 00:58:21,637 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 00:58:21,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 00:58:21,859 INFO L192 MainTranslator]: Completed translation [2019-10-07 00:58:21,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:21 WrapperNode [2019-10-07 00:58:21,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 00:58:21,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 00:58:21,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 00:58:21,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 00:58:21,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:21" (1/1) ... [2019-10-07 00:58:21,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:21" (1/1) ... [2019-10-07 00:58:21,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:21" (1/1) ... [2019-10-07 00:58:21,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:21" (1/1) ... [2019-10-07 00:58:21,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:21" (1/1) ... [2019-10-07 00:58:21,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:21" (1/1) ... [2019-10-07 00:58:22,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:21" (1/1) ... [2019-10-07 00:58:22,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 00:58:22,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 00:58:22,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 00:58:22,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 00:58:22,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:21" (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 00:58:22,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 00:58:22,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 00:58:22,081 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-07 00:58:22,082 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 00:58:22,082 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-07 00:58:22,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 00:58:22,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 00:58:22,084 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 00:58:22,084 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 00:58:22,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 00:58:22,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 00:58:24,051 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 00:58:24,052 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 00:58:24,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 12:58:24 BoogieIcfgContainer [2019-10-07 00:58:24,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 00:58:24,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 00:58:24,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 00:58:24,058 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 00:58:24,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 12:58:21" (1/3) ... [2019-10-07 00:58:24,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b183ca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 12:58:24, skipping insertion in model container [2019-10-07 00:58:24,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:21" (2/3) ... [2019-10-07 00:58:24,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b183ca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 12:58:24, skipping insertion in model container [2019-10-07 00:58:24,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 12:58:24" (3/3) ... [2019-10-07 00:58:24,061 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label50.c [2019-10-07 00:58:24,070 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 00:58:24,078 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 00:58:24,089 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 00:58:24,114 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 00:58:24,114 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 00:58:24,114 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 00:58:24,115 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 00:58:24,116 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 00:58:24,116 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 00:58:24,117 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 00:58:24,117 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 00:58:24,139 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-07 00:58:24,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-07 00:58:24,149 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:58:24,150 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:58:24,152 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:58:24,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:58:24,157 INFO L82 PathProgramCache]: Analyzing trace with hash -220073893, now seen corresponding path program 1 times [2019-10-07 00:58:24,166 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:58:24,167 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:24,167 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:24,167 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:24,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:58:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:24,594 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 00:58:24,595 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:24,595 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:58:24,596 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 00:58:24,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 00:58:24,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 00:58:24,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 00:58:24,619 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-07 00:58:25,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:58:25,141 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-07 00:58:25,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 00:58:25,143 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-07 00:58:25,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:58:25,159 INFO L225 Difference]: With dead ends: 273 [2019-10-07 00:58:25,159 INFO L226 Difference]: Without dead ends: 175 [2019-10-07 00:58:25,163 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 00:58:25,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-07 00:58:25,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-07 00:58:25,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-07 00:58:25,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-07 00:58:25,254 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-07 00:58:25,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:58:25,256 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-07 00:58:25,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 00:58:25,256 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-07 00:58:25,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-07 00:58:25,270 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:58:25,271 INFO L385 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:58:25,271 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:58:25,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:58:25,272 INFO L82 PathProgramCache]: Analyzing trace with hash -702608672, now seen corresponding path program 1 times [2019-10-07 00:58:25,273 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:58:25,273 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:25,273 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:25,274 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:25,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:58:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:58:25,500 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:25,500 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:58:25,501 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 00:58:25,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 00:58:25,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 00:58:25,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 00:58:25,503 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-10-07 00:58:25,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:58:25,918 INFO L93 Difference]: Finished difference Result 513 states and 937 transitions. [2019-10-07 00:58:25,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 00:58:25,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-10-07 00:58:25,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:58:25,923 INFO L225 Difference]: With dead ends: 513 [2019-10-07 00:58:25,924 INFO L226 Difference]: Without dead ends: 343 [2019-10-07 00:58:25,926 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 00:58:25,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-10-07 00:58:25,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2019-10-07 00:58:25,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-10-07 00:58:25,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 580 transitions. [2019-10-07 00:58:25,951 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 580 transitions. Word has length 94 [2019-10-07 00:58:25,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:58:25,952 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 580 transitions. [2019-10-07 00:58:25,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 00:58:25,952 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 580 transitions. [2019-10-07 00:58:25,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-07 00:58:25,954 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:58:25,954 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:58:25,954 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:58:25,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:58:25,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1246707500, now seen corresponding path program 1 times [2019-10-07 00:58:25,955 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:58:25,955 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:25,956 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:25,956 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:25,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:58:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:58:26,075 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:26,075 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:58:26,075 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 00:58:26,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 00:58:26,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 00:58:26,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-07 00:58:26,077 INFO L87 Difference]: Start difference. First operand 343 states and 580 transitions. Second operand 6 states. [2019-10-07 00:58:26,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:58:26,698 INFO L93 Difference]: Finished difference Result 1059 states and 1889 transitions. [2019-10-07 00:58:26,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 00:58:26,700 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2019-10-07 00:58:26,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:58:26,707 INFO L225 Difference]: With dead ends: 1059 [2019-10-07 00:58:26,708 INFO L226 Difference]: Without dead ends: 721 [2019-10-07 00:58:26,711 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-07 00:58:26,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-10-07 00:58:26,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 705. [2019-10-07 00:58:26,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 705 states. [2019-10-07 00:58:26,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1144 transitions. [2019-10-07 00:58:26,769 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1144 transitions. Word has length 100 [2019-10-07 00:58:26,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:58:26,769 INFO L462 AbstractCegarLoop]: Abstraction has 705 states and 1144 transitions. [2019-10-07 00:58:26,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 00:58:26,770 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1144 transitions. [2019-10-07 00:58:26,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-07 00:58:26,773 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:58:26,773 INFO L385 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:58:26,773 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:58:26,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:58:26,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1308012349, now seen corresponding path program 1 times [2019-10-07 00:58:26,774 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:58:26,774 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:26,774 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:26,775 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:26,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:58:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:58:26,844 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:26,844 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:58:26,844 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 00:58:26,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 00:58:26,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 00:58:26,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 00:58:26,845 INFO L87 Difference]: Start difference. First operand 705 states and 1144 transitions. Second operand 6 states. [2019-10-07 00:58:27,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:58:27,586 INFO L93 Difference]: Finished difference Result 1783 states and 2979 transitions. [2019-10-07 00:58:27,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 00:58:27,587 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-10-07 00:58:27,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:58:27,596 INFO L225 Difference]: With dead ends: 1783 [2019-10-07 00:58:27,596 INFO L226 Difference]: Without dead ends: 1083 [2019-10-07 00:58:27,602 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 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 00:58:27,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2019-10-07 00:58:27,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1069. [2019-10-07 00:58:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1069 states. [2019-10-07 00:58:27,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1678 transitions. [2019-10-07 00:58:27,673 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1678 transitions. Word has length 108 [2019-10-07 00:58:27,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:58:27,674 INFO L462 AbstractCegarLoop]: Abstraction has 1069 states and 1678 transitions. [2019-10-07 00:58:27,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 00:58:27,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1678 transitions. [2019-10-07 00:58:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-07 00:58:27,679 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:58:27,680 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:58:27,680 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:58:27,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:58:27,681 INFO L82 PathProgramCache]: Analyzing trace with hash 4631830, now seen corresponding path program 1 times [2019-10-07 00:58:27,681 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:58:27,681 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:27,681 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:27,681 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:58:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-07 00:58:27,864 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:27,864 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 00:58:27,864 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 00:58:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:27,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 00:58:27,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 00:58:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-07 00:58:28,058 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 00:58:28,110 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-07 00:58:28,111 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 00:58:28,111 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 6 [2019-10-07 00:58:28,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 00:58:28,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 00:58:28,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-07 00:58:28,114 INFO L87 Difference]: Start difference. First operand 1069 states and 1678 transitions. Second operand 3 states. [2019-10-07 00:58:28,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:58:28,559 INFO L93 Difference]: Finished difference Result 2733 states and 4333 transitions. [2019-10-07 00:58:28,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 00:58:28,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-10-07 00:58:28,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:58:28,566 INFO L225 Difference]: With dead ends: 2733 [2019-10-07 00:58:28,566 INFO L226 Difference]: Without dead ends: 977 [2019-10-07 00:58:28,570 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 244 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-07 00:58:28,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2019-10-07 00:58:28,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 977. [2019-10-07 00:58:28,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 977 states. [2019-10-07 00:58:28,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1448 transitions. [2019-10-07 00:58:28,603 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1448 transitions. Word has length 121 [2019-10-07 00:58:28,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:58:28,603 INFO L462 AbstractCegarLoop]: Abstraction has 977 states and 1448 transitions. [2019-10-07 00:58:28,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 00:58:28,604 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1448 transitions. [2019-10-07 00:58:28,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-07 00:58:28,608 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:58:28,608 INFO L385 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:58:28,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 00:58:28,815 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:58:28,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:58:28,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1269666795, now seen corresponding path program 1 times [2019-10-07 00:58:28,816 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:58:28,816 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:28,817 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:28,817 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:28,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:58:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-07 00:58:28,930 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:28,931 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 00:58:28,931 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 00:58:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:29,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 00:58:29,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 00:58:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-07 00:58:29,062 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 00:58:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 00:58:29,124 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 00:58:29,176 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-07 00:58:29,176 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 00:58:29,183 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 00:58:29,190 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 00:58:29,191 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 00:58:29,452 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-07 00:58:30,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 00:58:30,019 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 00:58:30,026 INFO L168 Benchmark]: Toolchain (without parser) took 8882.36 ms. Allocated memory was 143.7 MB in the beginning and 354.4 MB in the end (delta: 210.8 MB). Free memory was 99.7 MB in the beginning and 265.3 MB in the end (delta: -165.6 MB). Peak memory consumption was 45.2 MB. Max. memory is 7.1 GB. [2019-10-07 00:58:30,026 INFO L168 Benchmark]: CDTParser took 0.89 ms. Allocated memory is still 143.7 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 00:58:30,027 INFO L168 Benchmark]: CACSL2BoogieTranslator took 715.84 ms. Allocated memory was 143.7 MB in the beginning and 202.9 MB in the end (delta: 59.2 MB). Free memory was 99.5 MB in the beginning and 170.6 MB in the end (delta: -71.1 MB). Peak memory consumption was 30.7 MB. Max. memory is 7.1 GB. [2019-10-07 00:58:30,028 INFO L168 Benchmark]: Boogie Preprocessor took 154.72 ms. Allocated memory is still 202.9 MB. Free memory was 170.6 MB in the beginning and 165.5 MB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 7.1 GB. [2019-10-07 00:58:30,029 INFO L168 Benchmark]: RCFGBuilder took 2038.39 ms. Allocated memory was 202.9 MB in the beginning and 255.9 MB in the end (delta: 53.0 MB). Free memory was 165.5 MB in the beginning and 204.4 MB in the end (delta: -38.9 MB). Peak memory consumption was 119.2 MB. Max. memory is 7.1 GB. [2019-10-07 00:58:30,030 INFO L168 Benchmark]: TraceAbstraction took 5968.42 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 204.4 MB in the beginning and 265.3 MB in the end (delta: -60.8 MB). Peak memory consumption was 37.7 MB. Max. memory is 7.1 GB. [2019-10-07 00:58:30,034 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.89 ms. Allocated memory is still 143.7 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 715.84 ms. Allocated memory was 143.7 MB in the beginning and 202.9 MB in the end (delta: 59.2 MB). Free memory was 99.5 MB in the beginning and 170.6 MB in the end (delta: -71.1 MB). Peak memory consumption was 30.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 154.72 ms. Allocated memory is still 202.9 MB. Free memory was 170.6 MB in the beginning and 165.5 MB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 2038.39 ms. Allocated memory was 202.9 MB in the beginning and 255.9 MB in the end (delta: 53.0 MB). Free memory was 165.5 MB in the beginning and 204.4 MB in the end (delta: -38.9 MB). Peak memory consumption was 119.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5968.42 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 204.4 MB in the beginning and 265.3 MB in the end (delta: -60.8 MB). Peak memory consumption was 37.7 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...