./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/nested6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invgen/nested6.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b3a725921be8310e882457f7f33c9ff7dbee0bc2 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 10:57:40,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 10:57:40,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 10:57:40,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 10:57:40,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 10:57:40,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 10:57:40,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 10:57:40,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 10:57:40,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 10:57:40,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 10:57:40,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 10:57:40,931 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 10:57:40,931 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 10:57:40,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 10:57:40,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 10:57:40,937 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 10:57:40,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 10:57:40,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 10:57:40,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 10:57:40,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 10:57:40,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 10:57:40,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 10:57:40,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 10:57:40,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 10:57:40,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 10:57:40,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 10:57:40,966 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 10:57:40,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 10:57:40,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 10:57:40,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 10:57:40,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 10:57:40,969 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 10:57:40,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 10:57:40,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 10:57:40,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 10:57:40,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 10:57:40,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 10:57:40,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 10:57:40,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 10:57:40,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 10:57:40,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 10:57:40,980 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 10:57:41,024 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 10:57:41,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 10:57:41,042 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 10:57:41,042 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 10:57:41,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 10:57:41,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 10:57:41,043 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 10:57:41,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 10:57:41,044 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 10:57:41,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 10:57:41,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 10:57:41,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 10:57:41,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 10:57:41,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 10:57:41,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 10:57:41,046 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 10:57:41,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 10:57:41,046 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 10:57:41,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 10:57:41,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 10:57:41,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 10:57:41,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 10:57:41,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 10:57:41,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 10:57:41,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 10:57:41,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 10:57:41,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 10:57:41,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 10:57:41,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 10:57:41,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 10:57:41,048 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3a725921be8310e882457f7f33c9ff7dbee0bc2 [2021-08-29 10:57:41,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 10:57:41,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 10:57:41,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 10:57:41,570 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 10:57:41,585 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 10:57:41,586 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/nested6.i [2021-08-29 10:57:41,650 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e384da4d6/2fd7d83d29f14468921a059fdb188f36/FLAGf921b7531 [2021-08-29 10:57:42,187 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 10:57:42,187 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/nested6.i [2021-08-29 10:57:42,192 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e384da4d6/2fd7d83d29f14468921a059fdb188f36/FLAGf921b7531 [2021-08-29 10:57:42,662 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e384da4d6/2fd7d83d29f14468921a059fdb188f36 [2021-08-29 10:57:42,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 10:57:42,665 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 10:57:42,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 10:57:42,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 10:57:42,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 10:57:42,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:57:42" (1/1) ... [2021-08-29 10:57:42,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38763f32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:42, skipping insertion in model container [2021-08-29 10:57:42,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:57:42" (1/1) ... [2021-08-29 10:57:42,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 10:57:42,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 10:57:42,828 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/nested6.i[893,906] [2021-08-29 10:57:42,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 10:57:42,853 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 10:57:42,898 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/nested6.i[893,906] [2021-08-29 10:57:42,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 10:57:42,924 INFO L208 MainTranslator]: Completed translation [2021-08-29 10:57:42,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:42 WrapperNode [2021-08-29 10:57:42,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 10:57:42,927 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 10:57:42,927 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 10:57:42,927 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 10:57:42,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:42" (1/1) ... [2021-08-29 10:57:42,935 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:42" (1/1) ... [2021-08-29 10:57:42,949 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 10:57:42,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 10:57:42,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 10:57:42,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 10:57:42,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:42" (1/1) ... [2021-08-29 10:57:42,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:42" (1/1) ... [2021-08-29 10:57:42,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:42" (1/1) ... [2021-08-29 10:57:42,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:42" (1/1) ... [2021-08-29 10:57:42,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:42" (1/1) ... [2021-08-29 10:57:42,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:42" (1/1) ... [2021-08-29 10:57:42,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:42" (1/1) ... [2021-08-29 10:57:42,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 10:57:42,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 10:57:42,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 10:57:42,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 10:57:42,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:42" (1/1) ... [2021-08-29 10:57:42,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 10:57:42,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:57:42,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-29 10:57:43,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-29 10:57:43,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 10:57:43,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 10:57:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 10:57:43,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 10:57:43,140 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 10:57:43,140 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-08-29 10:57:43,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:57:43 BoogieIcfgContainer [2021-08-29 10:57:43,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 10:57:43,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 10:57:43,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 10:57:43,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 10:57:43,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:57:42" (1/3) ... [2021-08-29 10:57:43,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752fab3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:57:43, skipping insertion in model container [2021-08-29 10:57:43,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:42" (2/3) ... [2021-08-29 10:57:43,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752fab3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:57:43, skipping insertion in model container [2021-08-29 10:57:43,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:57:43" (3/3) ... [2021-08-29 10:57:43,147 INFO L111 eAbstractionObserver]: Analyzing ICFG nested6.i [2021-08-29 10:57:43,150 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 10:57:43,150 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-08-29 10:57:43,192 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 10:57:43,198 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 10:57:43,199 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-29 10:57:43,211 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 10:57:43,215 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:57:43,215 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:57:43,216 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:57:43,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:57:43,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1094943316, now seen corresponding path program 1 times [2021-08-29 10:57:43,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:57:43,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290713094] [2021-08-29 10:57:43,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:57:43,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:57:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:57:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:57:43,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:57:43,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290713094] [2021-08-29 10:57:43,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290713094] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:57:43,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 10:57:43,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 10:57:43,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627168145] [2021-08-29 10:57:43,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 10:57:43,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:57:43,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 10:57:43,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 10:57:43,512 INFO L87 Difference]: Start difference. First operand has 26 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:43,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:57:43,623 INFO L93 Difference]: Finished difference Result 59 states and 84 transitions. [2021-08-29 10:57:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 10:57:43,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-29 10:57:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:57:43,629 INFO L225 Difference]: With dead ends: 59 [2021-08-29 10:57:43,629 INFO L226 Difference]: Without dead ends: 26 [2021-08-29 10:57:43,631 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.37ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 10:57:43,647 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.29ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.56ms IncrementalHoareTripleChecker+Time [2021-08-29 10:57:43,647 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 1.29ms Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 79.56ms Time] [2021-08-29 10:57:43,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-29 10:57:43,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2021-08-29 10:57:43,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-08-29 10:57:43,678 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 10 [2021-08-29 10:57:43,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:57:43,678 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-08-29 10:57:43,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:43,678 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-08-29 10:57:43,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 10:57:43,679 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:57:43,679 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:57:43,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 10:57:43,679 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:57:43,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:57:43,680 INFO L82 PathProgramCache]: Analyzing trace with hash 415731034, now seen corresponding path program 1 times [2021-08-29 10:57:43,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:57:43,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536447501] [2021-08-29 10:57:43,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:57:43,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:57:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:57:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:57:43,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:57:43,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536447501] [2021-08-29 10:57:43,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536447501] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:57:43,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 10:57:43,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 10:57:43,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425595268] [2021-08-29 10:57:43,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 10:57:43,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:57:43,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 10:57:43,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 10:57:43,755 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:43,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:57:43,841 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-08-29 10:57:43,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 10:57:43,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-29 10:57:43,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:57:43,843 INFO L225 Difference]: With dead ends: 38 [2021-08-29 10:57:43,843 INFO L226 Difference]: Without dead ends: 36 [2021-08-29 10:57:43,843 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.59ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-29 10:57:43,844 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.97ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.25ms IncrementalHoareTripleChecker+Time [2021-08-29 10:57:43,844 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 115 Unknown, 0 Unchecked, 0.97ms Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 64.25ms Time] [2021-08-29 10:57:43,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-29 10:57:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 18. [2021-08-29 10:57:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:43,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-08-29 10:57:43,849 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-08-29 10:57:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:57:43,849 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-08-29 10:57:43,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:43,849 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-08-29 10:57:43,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-29 10:57:43,849 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:57:43,849 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:57:43,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 10:57:43,850 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:57:43,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:57:43,850 INFO L82 PathProgramCache]: Analyzing trace with hash 26617871, now seen corresponding path program 1 times [2021-08-29 10:57:43,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:57:43,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262110998] [2021-08-29 10:57:43,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:57:43,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:57:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:57:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:57:43,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:57:43,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262110998] [2021-08-29 10:57:43,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262110998] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:57:43,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 10:57:43,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 10:57:43,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724390226] [2021-08-29 10:57:43,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 10:57:43,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:57:43,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 10:57:43,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 10:57:43,917 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:43,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:57:43,980 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-08-29 10:57:43,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 10:57:43,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-29 10:57:43,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:57:43,981 INFO L225 Difference]: With dead ends: 38 [2021-08-29 10:57:43,981 INFO L226 Difference]: Without dead ends: 36 [2021-08-29 10:57:43,982 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.80ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 10:57:43,982 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.69ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.30ms IncrementalHoareTripleChecker+Time [2021-08-29 10:57:43,983 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 81 Unknown, 0 Unchecked, 0.69ms Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 49.30ms Time] [2021-08-29 10:57:43,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-29 10:57:43,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2021-08-29 10:57:43,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:43,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-08-29 10:57:43,989 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 12 [2021-08-29 10:57:43,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:57:43,990 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-08-29 10:57:43,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:43,990 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-08-29 10:57:43,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 10:57:43,990 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:57:43,991 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:57:43,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-29 10:57:43,991 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:57:43,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:57:43,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1040435036, now seen corresponding path program 1 times [2021-08-29 10:57:43,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:57:43,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949909168] [2021-08-29 10:57:43,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:57:43,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:57:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:57:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:57:44,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:57:44,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949909168] [2021-08-29 10:57:44,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949909168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:57:44,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979145283] [2021-08-29 10:57:44,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:57:44,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:57:44,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:57:44,038 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 10:57:44,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 10:57:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:57:44,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-29 10:57:44,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:57:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:57:44,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 10:57:44,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979145283] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:57:44,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-29 10:57:44,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-08-29 10:57:44,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831173039] [2021-08-29 10:57:44,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 10:57:44,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:57:44,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 10:57:44,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-29 10:57:44,267 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:44,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:57:44,384 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2021-08-29 10:57:44,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 10:57:44,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-29 10:57:44,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:57:44,385 INFO L225 Difference]: With dead ends: 80 [2021-08-29 10:57:44,385 INFO L226 Difference]: Without dead ends: 59 [2021-08-29 10:57:44,385 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 62.50ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-29 10:57:44,386 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.90ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.97ms IncrementalHoareTripleChecker+Time [2021-08-29 10:57:44,386 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 87 Unknown, 0 Unchecked, 0.90ms Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 81.97ms Time] [2021-08-29 10:57:44,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-29 10:57:44,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 30. [2021-08-29 10:57:44,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:44,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-08-29 10:57:44,391 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 16 [2021-08-29 10:57:44,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:57:44,391 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-08-29 10:57:44,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:44,391 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-08-29 10:57:44,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-29 10:57:44,392 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:57:44,392 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:57:44,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 10:57:44,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:57:44,593 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:57:44,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:57:44,593 INFO L82 PathProgramCache]: Analyzing trace with hash -856675865, now seen corresponding path program 1 times [2021-08-29 10:57:44,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:57:44,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593579731] [2021-08-29 10:57:44,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:57:44,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:57:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:57:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:57:44,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:57:44,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593579731] [2021-08-29 10:57:44,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593579731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:57:44,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134563204] [2021-08-29 10:57:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:57:44,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:57:44,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:57:44,658 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 10:57:44,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 10:57:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:57:44,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-29 10:57:44,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:57:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:57:44,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:57:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:57:44,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134563204] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:57:44,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:57:44,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2021-08-29 10:57:44,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050551405] [2021-08-29 10:57:44,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-29 10:57:44,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:57:44,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-29 10:57:44,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-29 10:57:44,831 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:45,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:57:45,229 INFO L93 Difference]: Finished difference Result 88 states and 113 transitions. [2021-08-29 10:57:45,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-29 10:57:45,229 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-29 10:57:45,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:57:45,230 INFO L225 Difference]: With dead ends: 88 [2021-08-29 10:57:45,230 INFO L226 Difference]: Without dead ends: 75 [2021-08-29 10:57:45,231 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 273.37ms TimeCoverageRelationStatistics Valid=297, Invalid=1035, Unknown=0, NotChecked=0, Total=1332 [2021-08-29 10:57:45,231 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 126.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.47ms SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148.02ms IncrementalHoareTripleChecker+Time [2021-08-29 10:57:45,231 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 300 Unknown, 0 Unchecked, 1.47ms Time], IncrementalHoareTripleChecker [77 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 148.02ms Time] [2021-08-29 10:57:45,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-29 10:57:45,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 49. [2021-08-29 10:57:45,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:45,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2021-08-29 10:57:45,239 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 19 [2021-08-29 10:57:45,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:57:45,239 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2021-08-29 10:57:45,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:45,240 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2021-08-29 10:57:45,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-29 10:57:45,240 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:57:45,240 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:57:45,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 10:57:45,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:57:45,449 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:57:45,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:57:45,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1284078331, now seen corresponding path program 1 times [2021-08-29 10:57:45,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:57:45,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946913735] [2021-08-29 10:57:45,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:57:45,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:57:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:57:45,535 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-29 10:57:45,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:57:45,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946913735] [2021-08-29 10:57:45,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946913735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:57:45,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299933878] [2021-08-29 10:57:45,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:57:45,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:57:45,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:57:45,537 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 10:57:45,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 10:57:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:57:45,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 10:57:45,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:57:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-29 10:57:45,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:57:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-29 10:57:45,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299933878] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:57:45,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:57:45,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-08-29 10:57:45,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071117153] [2021-08-29 10:57:45,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-29 10:57:45,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:57:45,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-29 10:57:45,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-08-29 10:57:45,734 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:45,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:57:45,858 INFO L93 Difference]: Finished difference Result 111 states and 136 transitions. [2021-08-29 10:57:45,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 10:57:45,859 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-29 10:57:45,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:57:45,859 INFO L225 Difference]: With dead ends: 111 [2021-08-29 10:57:45,859 INFO L226 Difference]: Without dead ends: 78 [2021-08-29 10:57:45,860 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 67.98ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-08-29 10:57:45,860 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.88ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.58ms IncrementalHoareTripleChecker+Time [2021-08-29 10:57:45,861 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 237 Unknown, 0 Unchecked, 0.88ms Time], IncrementalHoareTripleChecker [5 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 98.58ms Time] [2021-08-29 10:57:45,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-29 10:57:45,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2021-08-29 10:57:45,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 61 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:45,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2021-08-29 10:57:45,869 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 28 [2021-08-29 10:57:45,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:57:45,869 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2021-08-29 10:57:45,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:45,869 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2021-08-29 10:57:45,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-29 10:57:45,870 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:57:45,870 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:57:45,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 10:57:46,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:57:46,082 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:57:46,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:57:46,082 INFO L82 PathProgramCache]: Analyzing trace with hash -777365176, now seen corresponding path program 2 times [2021-08-29 10:57:46,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:57:46,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989664451] [2021-08-29 10:57:46,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:57:46,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:57:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:57:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-29 10:57:46,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:57:46,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989664451] [2021-08-29 10:57:46,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989664451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:57:46,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963577493] [2021-08-29 10:57:46,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 10:57:46,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:57:46,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:57:46,193 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 10:57:46,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 10:57:46,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 10:57:46,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 10:57:46,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 10:57:46,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:57:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 10:57:46,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:57:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 10:57:46,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963577493] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:57:46,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:57:46,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 12 [2021-08-29 10:57:46,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842428280] [2021-08-29 10:57:46,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-29 10:57:46,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:57:46,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-29 10:57:46,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-29 10:57:46,503 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:46,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:57:46,841 INFO L93 Difference]: Finished difference Result 155 states and 196 transitions. [2021-08-29 10:57:46,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-29 10:57:46,842 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-29 10:57:46,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:57:46,842 INFO L225 Difference]: With dead ends: 155 [2021-08-29 10:57:46,842 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 10:57:46,843 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 252.00ms TimeCoverageRelationStatistics Valid=255, Invalid=935, Unknown=0, NotChecked=0, Total=1190 [2021-08-29 10:57:46,844 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 73 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.17ms SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 119.18ms IncrementalHoareTripleChecker+Time [2021-08-29 10:57:46,844 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 0 Invalid, 273 Unknown, 0 Unchecked, 1.17ms Time], IncrementalHoareTripleChecker [78 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 119.18ms Time] [2021-08-29 10:57:46,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 10:57:46,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 10:57:46,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:46,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 10:57:46,846 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2021-08-29 10:57:46,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:57:46,846 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 10:57:46,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:46,846 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 10:57:46,846 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 10:57:46,848 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-08-29 10:57:46,849 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2021-08-29 10:57:46,849 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2021-08-29 10:57:46,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-29 10:57:47,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:57:47,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 10:57:47,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 10:57:47,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 10:57:47,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 10:57:47,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 10:57:47,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 10:57:47,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 10:57:47,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 10:57:47,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 10:57:47,665 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-08-29 10:57:47,666 INFO L858 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-08-29 10:57:47,666 INFO L858 garLoopResultBuilder]: For program point L19-1(line 19) no Hoare annotation was computed. [2021-08-29 10:57:47,666 INFO L858 garLoopResultBuilder]: For program point L19-2(line 19) no Hoare annotation was computed. [2021-08-29 10:57:47,666 INFO L854 garLoopResultBuilder]: At program point L36-2(lines 36 38) the Hoare annotation is: (let ((.cse2 (* 2 ULTIMATE.start_main_~i~0))) (let ((.cse0 (<= .cse2 ULTIMATE.start_main_~k~0)) (.cse1 (+ ULTIMATE.start_main_~j~0 1))) (or (and .cse0 (<= .cse1 (+ ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~i~0)) (<= (div (* ULTIMATE.start_main_~j~0 (- 1)) (- 2)) 0) (= ULTIMATE.start_main_~i~0 0) (<= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) .cse0 (<= .cse1 ULTIMATE.start_main_~n~0) (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (<= .cse2 ULTIMATE.start_main_~j~0))))) [2021-08-29 10:57:47,666 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 10:57:47,666 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 10:57:47,666 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 10:57:47,666 INFO L858 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2021-08-29 10:57:47,666 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-08-29 10:57:47,666 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 10:57:47,666 INFO L858 garLoopResultBuilder]: For program point L33-2(lines 33 45) no Hoare annotation was computed. [2021-08-29 10:57:47,666 INFO L854 garLoopResultBuilder]: At program point L33-3(lines 33 45) the Hoare annotation is: (let ((.cse0 (<= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0)) (.cse1 (<= ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~k~0))) (or (and .cse0 (<= ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~j~0) (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) .cse1) (and .cse0 (= ULTIMATE.start_main_~i~0 0) .cse1))) [2021-08-29 10:57:47,666 INFO L858 garLoopResultBuilder]: For program point L29(lines 29 32) no Hoare annotation was computed. [2021-08-29 10:57:47,666 INFO L858 garLoopResultBuilder]: For program point L29-1(lines 29 32) no Hoare annotation was computed. [2021-08-29 10:57:47,667 INFO L861 garLoopResultBuilder]: At program point L46(lines 24 48) the Hoare annotation is: true [2021-08-29 10:57:47,667 INFO L854 garLoopResultBuilder]: At program point L34-2(lines 34 44) the Hoare annotation is: (let ((.cse3 (* 2 ULTIMATE.start_main_~i~0))) (let ((.cse0 (<= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0)) (.cse1 (<= .cse3 ULTIMATE.start_main_~j~0)) (.cse2 (<= ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~k~0))) (or (and .cse0 (<= (+ ULTIMATE.start_main_~j~0 1) (+ ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~i~0)) (= ULTIMATE.start_main_~i~0 0) .cse1 .cse2 (<= ULTIMATE.start_main_~j~0 .cse3)) (and .cse0 (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) .cse1 .cse2)))) [2021-08-29 10:57:47,667 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-08-29 10:57:47,667 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-08-29 10:57:47,667 INFO L854 garLoopResultBuilder]: At program point L18-2(lines 1 48) the Hoare annotation is: (let ((.cse0 (* 2 ULTIMATE.start_main_~i~0))) (and (<= .cse0 ULTIMATE.start_main_~k~0) (<= (+ ULTIMATE.start_main_~k~0 1) ULTIMATE.start_main_~n~0) (<= (+ ULTIMATE.start_main_~j~0 1) ULTIMATE.start_main_~n~0) (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (<= .cse0 ULTIMATE.start_main_~j~0))) [2021-08-29 10:57:47,667 INFO L858 garLoopResultBuilder]: For program point L18-3(lines 18 20) no Hoare annotation was computed. [2021-08-29 10:57:47,667 INFO L861 garLoopResultBuilder]: At program point L47(lines 24 48) the Hoare annotation is: true [2021-08-29 10:57:47,667 INFO L854 garLoopResultBuilder]: At program point L18-5(lines 17 22) the Hoare annotation is: (and (<= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (<= (+ ULTIMATE.start_main_~j~0 1) ULTIMATE.start_main_~n~0) (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~k~0)) [2021-08-29 10:57:47,667 INFO L858 garLoopResultBuilder]: For program point L18-6(lines 18 20) no Hoare annotation was computed. [2021-08-29 10:57:47,667 INFO L854 garLoopResultBuilder]: At program point L18-8(lines 1 48) the Hoare annotation is: (let ((.cse4 (* 2 ULTIMATE.start_main_~i~0))) (let ((.cse0 (<= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0)) (.cse1 (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond))) (.cse2 (<= .cse4 ULTIMATE.start_main_~j~0)) (.cse3 (<= ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~k~0))) (or (and .cse0 (<= (+ ULTIMATE.start_main_~j~0 1) ULTIMATE.start_main_~n~0) .cse1 .cse2 .cse3) (and .cse0 (= ULTIMATE.start_main_~i~0 0) .cse1 .cse2 .cse3 (<= ULTIMATE.start_main_~j~0 .cse4))))) [2021-08-29 10:57:47,667 INFO L858 garLoopResultBuilder]: For program point L35(lines 35 43) no Hoare annotation was computed. [2021-08-29 10:57:47,670 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 10:57:47,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 10:57:47 BoogieIcfgContainer [2021-08-29 10:57:47,691 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 10:57:47,692 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 10:57:47,692 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 10:57:47,692 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 10:57:47,693 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:57:43" (3/4) ... [2021-08-29 10:57:47,694 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 10:57:47,706 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-29 10:57:47,707 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 10:57:47,707 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 10:57:47,707 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 10:57:47,731 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 10:57:47,731 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 10:57:47,732 INFO L158 Benchmark]: Toolchain (without parser) took 5066.98ms. Allocated memory was 54.5MB in the beginning and 81.8MB in the end (delta: 27.3MB). Free memory was 39.2MB in the beginning and 62.0MB in the end (delta: -22.8MB). Peak memory consumption was 36.8MB. Max. memory is 16.1GB. [2021-08-29 10:57:47,732 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 44.0MB. Free memory was 26.3MB in the beginning and 26.2MB in the end (delta: 31.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:57:47,732 INFO L158 Benchmark]: CACSL2BoogieTranslator took 260.45ms. Allocated memory is still 54.5MB. Free memory was 39.0MB in the beginning and 38.3MB in the end (delta: 743.7kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-08-29 10:57:47,732 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.86ms. Allocated memory is still 54.5MB. Free memory was 38.3MB in the beginning and 36.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 10:57:47,732 INFO L158 Benchmark]: Boogie Preprocessor took 26.30ms. Allocated memory is still 54.5MB. Free memory was 36.7MB in the beginning and 35.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:57:47,733 INFO L158 Benchmark]: RCFGBuilder took 164.12ms. Allocated memory is still 54.5MB. Free memory was 35.7MB in the beginning and 27.1MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 10:57:47,733 INFO L158 Benchmark]: TraceAbstraction took 4548.81ms. Allocated memory was 54.5MB in the beginning and 81.8MB in the end (delta: 27.3MB). Free memory was 26.6MB in the beginning and 31.0MB in the end (delta: -4.4MB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. [2021-08-29 10:57:47,733 INFO L158 Benchmark]: Witness Printer took 39.34ms. Allocated memory is still 81.8MB. Free memory was 31.0MB in the beginning and 62.0MB in the end (delta: -31.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 10:57:47,734 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 44.0MB. Free memory was 26.3MB in the beginning and 26.2MB in the end (delta: 31.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 260.45ms. Allocated memory is still 54.5MB. Free memory was 39.0MB in the beginning and 38.3MB in the end (delta: 743.7kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.86ms. Allocated memory is still 54.5MB. Free memory was 38.3MB in the beginning and 36.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.30ms. Allocated memory is still 54.5MB. Free memory was 36.7MB in the beginning and 35.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 164.12ms. Allocated memory is still 54.5MB. Free memory was 35.7MB in the beginning and 27.1MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 4548.81ms. Allocated memory was 54.5MB in the beginning and 81.8MB in the end (delta: 27.3MB). Free memory was 26.6MB in the beginning and 31.0MB in the end (delta: -4.4MB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. * Witness Printer took 39.34ms. Allocated memory is still 81.8MB. Free memory was 31.0MB in the beginning and 62.0MB in the end (delta: -31.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 4478.62ms, OverallIterations: 7, TraceHistogramMax: 4, EmptinessCheckTime: 9.42ms, AutomataDifference: 1325.40ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 598.98ms, InitialAbstractionConstructionTime: 9.68ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 293 SdHoareTripleChecker+Valid, 640.85ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 293 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 520.54ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 297 mSDsCounter, 186 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1000 IncrementalHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 186 mSolverCounterUnsat, 0 mSDtfsCounter, 1000 mSolverCounterSat, 7.37ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 276 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 705.61ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=6, InterpolantAutomatonStates: 87, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 50.47ms AutomataMinimizationTime, 7 MinimizatonAttempts, 105 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 93 NumberOfFragments, 213 HoareAnnotationTreeSize, 8 FomulaSimplifications, 46672 FormulaSimplificationTreeSizeReduction, 240.43ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 3901 FormulaSimplificationTreeSizeReductionInter, 351.09ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 36.35ms SsaConstructionTime, 143.10ms SatisfiabilityAnalysisTime, 1150.54ms InterpolantComputationTime, 227 NumberOfCodeBlocks, 227 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 294 ConstructedInterpolants, 0 QuantifiedInterpolants, 910 SizeOfPredicates, 15 NumberOfNonLiveVariables, 351 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 151/187 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (((k <= n && j + 1 <= n) && !(0 == cond)) && 2 * i <= j) && n <= k - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: (((2 * i <= k && k + 1 <= n) && j + 1 <= n) && !(0 == cond)) && 2 * i <= j - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: (((k <= n && n <= j) && !(0 == cond)) && n <= k) || ((k <= n && i == 0) && n <= k) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: ((((k <= n && j + 1 <= n) && !(0 == cond)) && 2 * i <= j) && n <= k) || (((((k <= n && i == 0) && !(0 == cond)) && 2 * i <= j) && n <= k) && j <= 2 * i) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((k <= n && j + 1 <= n + i) && i == 0) && 2 * i <= j) && n <= k) && j <= 2 * i) || (((k <= n && !(0 == cond)) && 2 * i <= j) && n <= k) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((2 * i <= k && j + 1 <= n + i) && j * -1 / -2 <= 0) && i == 0) && k <= j) || ((((k <= n && 2 * i <= k) && j + 1 <= n) && !(0 == cond)) && 2 * i <= j) RESULT: Ultimate proved your program to be correct! [2021-08-29 10:57:47,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...