./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/sync01.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_bf60ff10-e275-428c-8d32-79c3cb915628/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_bf60ff10-e275-428c-8d32-79c3cb915628/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_bf60ff10-e275-428c-8d32-79c3cb915628/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_bf60ff10-e275-428c-8d32-79c3cb915628/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/sync01.i -s /tmp/vcloud-vcloud-master/worker/run_dir_bf60ff10-e275-428c-8d32-79c3cb915628/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_bf60ff10-e275-428c-8d32-79c3cb915628/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bfadf9642c1a15dc7e36a17b923c507de577ccb8 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:50:47,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:50:47,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:50:47,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:50:47,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:50:47,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:50:47,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:50:47,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:50:47,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:50:47,833 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:50:47,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:50:47,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:50:47,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:50:47,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:50:47,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:50:47,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:50:47,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:50:47,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:50:47,859 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:50:47,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:50:47,870 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:50:47,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:50:47,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:50:47,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:50:47,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:50:47,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:50:47,888 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:50:47,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:50:47,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:50:47,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:50:47,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:50:47,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:50:47,893 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:50:47,894 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:50:47,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:50:47,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:50:47,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:50:47,899 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:50:47,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:50:47,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:50:47,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:50:47,906 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_bf60ff10-e275-428c-8d32-79c3cb915628/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:50:47,960 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:50:47,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:50:47,962 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:50:47,962 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:50:47,963 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:50:47,963 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:50:47,963 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:50:47,964 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:50:47,964 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:50:47,964 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:50:47,966 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:50:47,966 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:50:47,966 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:50:47,967 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:50:47,967 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:50:47,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:50:47,968 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:50:47,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:50:47,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:50:47,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:50:47,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:50:47,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:50:47,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:50:47,970 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:50:47,971 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:50:47,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:50:47,971 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:50:47,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:50:47,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:50:47,972 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:50:47,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:50:47,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:50:47,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:50:47,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:50:47,974 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:50:47,974 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:50:47,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:50:47,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:50:47,975 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:50:47,975 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:50:47,975 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_bf60ff10-e275-428c-8d32-79c3cb915628/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_bf60ff10-e275-428c-8d32-79c3cb915628/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bfadf9642c1a15dc7e36a17b923c507de577ccb8 [2020-11-22 12:50:48,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:50:48,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:50:48,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:50:48,343 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:50:48,344 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:50:48,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_bf60ff10-e275-428c-8d32-79c3cb915628/bin/utaipan/../../sv-benchmarks/c/pthread/sync01.i [2020-11-22 12:50:48,424 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bf60ff10-e275-428c-8d32-79c3cb915628/bin/utaipan/data/233aa0fb6/aa00c7e349224dfe94ca96c3795f4a79/FLAGd67aaff1a [2020-11-22 12:50:49,066 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:50:49,067 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_bf60ff10-e275-428c-8d32-79c3cb915628/sv-benchmarks/c/pthread/sync01.i [2020-11-22 12:50:49,094 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bf60ff10-e275-428c-8d32-79c3cb915628/bin/utaipan/data/233aa0fb6/aa00c7e349224dfe94ca96c3795f4a79/FLAGd67aaff1a [2020-11-22 12:50:49,328 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_bf60ff10-e275-428c-8d32-79c3cb915628/bin/utaipan/data/233aa0fb6/aa00c7e349224dfe94ca96c3795f4a79 [2020-11-22 12:50:49,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:50:49,332 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:50:49,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:50:49,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:50:49,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:50:49,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:50:49" (1/1) ... [2020-11-22 12:50:49,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45ad3427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:50:49, skipping insertion in model container [2020-11-22 12:50:49,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:50:49" (1/1) ... [2020-11-22 12:50:49,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:50:49,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:50:49,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:50:49,930 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:50:49,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:50:50,128 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:50:50,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:50:50 WrapperNode [2020-11-22 12:50:50,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:50:50,131 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:50:50,131 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:50:50,131 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:50:50,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:50:50" (1/1) ... [2020-11-22 12:50:50,157 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:50:50" (1/1) ... [2020-11-22 12:50:50,186 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:50:50,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:50:50,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:50:50,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:50:50,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:50:50" (1/1) ... [2020-11-22 12:50:50,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:50:50" (1/1) ... [2020-11-22 12:50:50,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:50:50" (1/1) ... [2020-11-22 12:50:50,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:50:50" (1/1) ... [2020-11-22 12:50:50,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:50:50" (1/1) ... [2020-11-22 12:50:50,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:50:50" (1/1) ... [2020-11-22 12:50:50,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:50:50" (1/1) ... [2020-11-22 12:50:50,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:50:50,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:50:50,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:50:50,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:50:50,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:50:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf60ff10-e275-428c-8d32-79c3cb915628/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:50:50,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:50:50,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 12:50:50,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-22 12:50:50,335 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2020-11-22 12:50:50,336 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2020-11-22 12:50:50,336 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2020-11-22 12:50:50,337 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2020-11-22 12:50:50,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 12:50:50,344 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-11-22 12:50:50,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:50:50,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:50:50,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:50:50,347 WARN L208 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-22 12:50:51,013 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:50:51,014 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-22 12:50:51,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:50:51 BoogieIcfgContainer [2020-11-22 12:50:51,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:50:51,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:50:51,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:50:51,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:50:51,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:50:49" (1/3) ... [2020-11-22 12:50:51,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3876b437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:50:51, skipping insertion in model container [2020-11-22 12:50:51,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:50:50" (2/3) ... [2020-11-22 12:50:51,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3876b437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:50:51, skipping insertion in model container [2020-11-22 12:50:51,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:50:51" (3/3) ... [2020-11-22 12:50:51,026 INFO L111 eAbstractionObserver]: Analyzing ICFG sync01.i [2020-11-22 12:50:51,038 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-22 12:50:51,039 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:50:51,044 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 12:50:51,045 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-22 12:50:51,084 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,085 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,085 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,085 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,086 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,086 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,086 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,087 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,087 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,087 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,088 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,089 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,090 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,090 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,090 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,091 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,091 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,092 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,093 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,093 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,094 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,094 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet37| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,094 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,095 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet37| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,096 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,096 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,101 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,101 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,102 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,102 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,102 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,103 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,103 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,109 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,109 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,110 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,110 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,110 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,110 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,110 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet37| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:50:51,123 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2020-11-22 12:50:51,134 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-22 12:50:51,165 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:50:51,166 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:50:51,166 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:50:51,166 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:50:51,166 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:50:51,166 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:50:51,167 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:50:51,167 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:50:51,185 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-22 12:50:51,189 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 100 transitions, 222 flow [2020-11-22 12:50:51,193 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 100 transitions, 222 flow [2020-11-22 12:50:51,195 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 99 places, 100 transitions, 222 flow [2020-11-22 12:50:51,257 INFO L129 PetriNetUnfolder]: 7/100 cut-off events. [2020-11-22 12:50:51,258 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-11-22 12:50:51,265 INFO L80 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 100 events. 7/100 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 59. Up to 3 conditions per place. [2020-11-22 12:50:51,270 INFO L116 LiptonReduction]: Number of co-enabled transitions 840 [2020-11-22 12:50:54,377 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-22 12:50:54,521 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-22 12:50:54,988 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 103 [2020-11-22 12:50:55,117 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-22 12:50:56,014 WARN L193 SmtUtils]: Spent 884.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 171 [2020-11-22 12:50:56,528 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-11-22 12:50:56,535 INFO L131 LiptonReduction]: Checked pairs total: 3713 [2020-11-22 12:50:56,535 INFO L133 LiptonReduction]: Total number of compositions: 84 [2020-11-22 12:50:56,541 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 34 transitions, 90 flow [2020-11-22 12:50:56,560 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 198 states. [2020-11-22 12:50:56,562 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states. [2020-11-22 12:50:56,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-22 12:50:56,574 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:50:56,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:50:56,575 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:50:56,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:50:56,582 INFO L82 PathProgramCache]: Analyzing trace with hash -489540202, now seen corresponding path program 1 times [2020-11-22 12:50:56,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:50:56,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362983416] [2020-11-22 12:50:56,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:50:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:50:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:50:56,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362983416] [2020-11-22 12:50:56,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:50:56,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:50:56,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271823567] [2020-11-22 12:50:56,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:50:56,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:50:56,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:50:56,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:50:56,867 INFO L87 Difference]: Start difference. First operand 198 states. Second operand 3 states. [2020-11-22 12:50:56,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:50:56,970 INFO L93 Difference]: Finished difference Result 148 states and 270 transitions. [2020-11-22 12:50:56,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:50:56,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-11-22 12:50:56,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:50:56,990 INFO L225 Difference]: With dead ends: 148 [2020-11-22 12:50:56,990 INFO L226 Difference]: Without dead ends: 147 [2020-11-22 12:50:56,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:50:57,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-11-22 12:50:57,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-11-22 12:50:57,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-11-22 12:50:57,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 269 transitions. [2020-11-22 12:50:57,074 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 269 transitions. Word has length 15 [2020-11-22 12:50:57,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:50:57,075 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 269 transitions. [2020-11-22 12:50:57,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:50:57,076 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 269 transitions. [2020-11-22 12:50:57,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-22 12:50:57,083 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:50:57,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:50:57,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:50:57,084 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:50:57,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:50:57,086 INFO L82 PathProgramCache]: Analyzing trace with hash -798518579, now seen corresponding path program 1 times [2020-11-22 12:50:57,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:50:57,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203730576] [2020-11-22 12:50:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:50:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:50:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:50:57,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203730576] [2020-11-22 12:50:57,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:50:57,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:50:57,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696342639] [2020-11-22 12:50:57,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:50:57,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:50:57,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:50:57,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:50:57,242 INFO L87 Difference]: Start difference. First operand 147 states and 269 transitions. Second operand 3 states. [2020-11-22 12:50:57,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:50:57,302 INFO L93 Difference]: Finished difference Result 90 states and 155 transitions. [2020-11-22 12:50:57,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:50:57,304 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-11-22 12:50:57,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:50:57,305 INFO L225 Difference]: With dead ends: 90 [2020-11-22 12:50:57,305 INFO L226 Difference]: Without dead ends: 75 [2020-11-22 12:50:57,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:50:57,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-22 12:50:57,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-11-22 12:50:57,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-22 12:50:57,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 123 transitions. [2020-11-22 12:50:57,315 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 123 transitions. Word has length 21 [2020-11-22 12:50:57,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:50:57,315 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 123 transitions. [2020-11-22 12:50:57,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:50:57,315 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 123 transitions. [2020-11-22 12:50:57,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-22 12:50:57,319 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:50:57,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:50:57,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 12:50:57,320 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:50:57,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:50:57,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1875637967, now seen corresponding path program 2 times [2020-11-22 12:50:57,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:50:57,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278929800] [2020-11-22 12:50:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:50:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:50:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:50:57,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278929800] [2020-11-22 12:50:57,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:50:57,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-22 12:50:57,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262478282] [2020-11-22 12:50:57,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:50:57,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:50:57,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:50:57,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:50:57,460 INFO L87 Difference]: Start difference. First operand 75 states and 123 transitions. Second operand 5 states. [2020-11-22 12:50:57,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:50:57,516 INFO L93 Difference]: Finished difference Result 75 states and 122 transitions. [2020-11-22 12:50:57,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:50:57,518 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-11-22 12:50:57,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:50:57,519 INFO L225 Difference]: With dead ends: 75 [2020-11-22 12:50:57,519 INFO L226 Difference]: Without dead ends: 54 [2020-11-22 12:50:57,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-22 12:50:57,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-22 12:50:57,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-11-22 12:50:57,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-22 12:50:57,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 83 transitions. [2020-11-22 12:50:57,523 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 83 transitions. Word has length 21 [2020-11-22 12:50:57,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:50:57,524 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 83 transitions. [2020-11-22 12:50:57,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:50:57,524 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 83 transitions. [2020-11-22 12:50:57,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-22 12:50:57,525 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:50:57,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:50:57,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 12:50:57,525 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:50:57,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:50:57,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1516116315, now seen corresponding path program 1 times [2020-11-22 12:50:57,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:50:57,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122506604] [2020-11-22 12:50:57,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:50:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:50:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:50:57,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122506604] [2020-11-22 12:50:57,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:50:57,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-22 12:50:57,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066934016] [2020-11-22 12:50:57,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 12:50:57,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:50:57,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 12:50:57,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-22 12:50:57,703 INFO L87 Difference]: Start difference. First operand 54 states and 83 transitions. Second operand 8 states. [2020-11-22 12:50:57,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:50:57,785 INFO L93 Difference]: Finished difference Result 53 states and 82 transitions. [2020-11-22 12:50:57,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 12:50:57,789 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-11-22 12:50:57,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:50:57,789 INFO L225 Difference]: With dead ends: 53 [2020-11-22 12:50:57,789 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:50:57,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-11-22 12:50:57,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:50:57,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:50:57,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:50:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:50:57,791 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-11-22 12:50:57,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:50:57,791 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:50:57,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 12:50:57,791 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:50:57,791 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:50:57,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 12:50:57,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:50:57 BasicIcfg [2020-11-22 12:50:57,795 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:50:57,795 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:50:57,795 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:50:57,795 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:50:57,796 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:50:51" (3/4) ... [2020-11-22 12:50:57,799 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:50:57,808 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2020-11-22 12:50:57,808 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2020-11-22 12:50:57,815 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-11-22 12:50:57,815 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-22 12:50:57,815 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:50:57,816 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:50:57,887 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_bf60ff10-e275-428c-8d32-79c3cb915628/bin/utaipan/witness.graphml [2020-11-22 12:50:57,887 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:50:57,888 INFO L168 Benchmark]: Toolchain (without parser) took 8555.97 ms. Allocated memory was 100.7 MB in the beginning and 159.4 MB in the end (delta: 58.7 MB). Free memory was 71.6 MB in the beginning and 94.6 MB in the end (delta: -23.0 MB). Peak memory consumption was 34.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:50:57,889 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 100.7 MB. Free memory is still 59.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:50:57,889 INFO L168 Benchmark]: CACSL2BoogieTranslator took 795.94 ms. Allocated memory was 100.7 MB in the beginning and 132.1 MB in the end (delta: 31.5 MB). Free memory was 71.2 MB in the beginning and 65.3 MB in the end (delta: 5.8 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2020-11-22 12:50:57,890 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.85 ms. Allocated memory is still 132.1 MB. Free memory was 65.3 MB in the beginning and 63.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:50:57,891 INFO L168 Benchmark]: Boogie Preprocessor took 65.80 ms. Allocated memory is still 132.1 MB. Free memory was 63.4 MB in the beginning and 61.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:50:57,891 INFO L168 Benchmark]: RCFGBuilder took 759.31 ms. Allocated memory is still 132.1 MB. Free memory was 61.8 MB in the beginning and 102.3 MB in the end (delta: -40.5 MB). Peak memory consumption was 23.3 MB. Max. memory is 16.1 GB. [2020-11-22 12:50:57,892 INFO L168 Benchmark]: TraceAbstraction took 6776.50 ms. Allocated memory was 132.1 MB in the beginning and 159.4 MB in the end (delta: 27.3 MB). Free memory was 101.1 MB in the beginning and 96.7 MB in the end (delta: 4.4 MB). Peak memory consumption was 30.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:50:57,892 INFO L168 Benchmark]: Witness Printer took 92.08 ms. Allocated memory is still 159.4 MB. Free memory was 96.7 MB in the beginning and 94.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:50:57,896 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 100.7 MB. Free memory is still 59.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 795.94 ms. Allocated memory was 100.7 MB in the beginning and 132.1 MB in the end (delta: 31.5 MB). Free memory was 71.2 MB in the beginning and 65.3 MB in the end (delta: 5.8 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 59.85 ms. Allocated memory is still 132.1 MB. Free memory was 65.3 MB in the beginning and 63.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 65.80 ms. Allocated memory is still 132.1 MB. Free memory was 63.4 MB in the beginning and 61.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 759.31 ms. Allocated memory is still 132.1 MB. Free memory was 61.8 MB in the beginning and 102.3 MB in the end (delta: -40.5 MB). Peak memory consumption was 23.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6776.50 ms. Allocated memory was 132.1 MB in the beginning and 159.4 MB in the end (delta: 27.3 MB). Free memory was 101.1 MB in the beginning and 96.7 MB in the end (delta: 4.4 MB). Peak memory consumption was 30.5 MB. Max. memory is 16.1 GB. * Witness Printer took 92.08 ms. Allocated memory is still 159.4 MB. Free memory was 96.7 MB in the beginning and 94.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 600 VarBasedMoverChecksPositive, 71 VarBasedMoverChecksNegative, 34 SemBasedMoverChecksPositive, 37 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.4s, 211 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 5.3s, 99 PlacesBefore, 35 PlacesAfterwards, 100 TransitionsBefore, 34 TransitionsAfterwards, 840 CoEnabledTransitionPairs, 7 FixpointIterations, 52 TrivialSequentialCompositions, 14 ConcurrentSequentialCompositions, 10 TrivialYvCompositions, 6 ConcurrentYvCompositions, 2 ChoiceCompositions, 84 TotalNumberOfCompositions, 3713 MoverChecksTotal - PositiveResult [Line: 20]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 93 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.6s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.3s, HoareTripleCheckerStatistics: 110 SDtfs, 99 SDslu, 109 SDs, 0 SdLazy, 58 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=198occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 78 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 74 ConstructedInterpolants, 0 QuantifiedInterpolants, 5488 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...