./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe035_tso.oepc.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_c32e465b-6aa1-4f2b-ada4-f7399726518f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c32e465b-6aa1-4f2b-ada4-f7399726518f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c32e465b-6aa1-4f2b-ada4-f7399726518f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c32e465b-6aa1-4f2b-ada4-f7399726518f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe035_tso.oepc.i -s /tmp/vcloud-vcloud-master/worker/run_dir_c32e465b-6aa1-4f2b-ada4-f7399726518f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c32e465b-6aa1-4f2b-ada4-f7399726518f/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 579bf1ab04c697c17eb912588eb6e76933ecf217 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 13:01:06,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:01:06,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:01:06,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:01:06,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:01:06,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:01:06,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:01:06,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:01:06,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:01:06,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:01:06,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:01:06,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:01:06,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:01:06,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:01:06,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:01:06,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:01:06,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:01:06,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:01:06,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:01:06,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:01:06,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:01:06,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:01:06,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:01:06,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:01:06,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:01:06,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:01:06,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:01:06,915 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:01:06,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:01:06,917 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:01:06,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:01:06,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:01:06,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:01:06,920 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:01:06,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:01:06,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:01:06,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:01:06,923 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:01:06,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:01:06,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:01:06,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:01:06,927 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c32e465b-6aa1-4f2b-ada4-f7399726518f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:01:06,966 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:01:06,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:01:06,970 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:01:06,971 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:01:06,971 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:01:06,971 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:01:06,971 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:01:06,972 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:01:06,972 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:01:06,972 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:01:06,973 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:01:06,974 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:01:06,974 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:01:06,974 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:01:06,974 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:01:06,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:01:06,975 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:01:06,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:01:06,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:01:06,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:01:06,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:01:06,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:01:06,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:01:06,977 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:01:06,977 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:01:06,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:01:06,978 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:01:06,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:01:06,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:01:06,979 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:01:06,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:01:06,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:01:06,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:01:06,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:01:06,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:01:06,980 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:01:06,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:01:06,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:01:06,981 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:01:06,981 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:01:06,981 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_c32e465b-6aa1-4f2b-ada4-f7399726518f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c32e465b-6aa1-4f2b-ada4-f7399726518f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 579bf1ab04c697c17eb912588eb6e76933ecf217 [2020-11-22 13:01:07,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:01:07,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:01:07,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:01:07,270 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:01:07,270 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:01:07,271 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c32e465b-6aa1-4f2b-ada4-f7399726518f/bin/utaipan/../../sv-benchmarks/c/pthread-wmm/safe035_tso.oepc.i [2020-11-22 13:01:07,338 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c32e465b-6aa1-4f2b-ada4-f7399726518f/bin/utaipan/data/e437795a2/4c76c8df86754aa387866d0cb5428497/FLAGb32bd0b03 [2020-11-22 13:01:07,910 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:01:07,911 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c32e465b-6aa1-4f2b-ada4-f7399726518f/sv-benchmarks/c/pthread-wmm/safe035_tso.oepc.i [2020-11-22 13:01:07,936 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c32e465b-6aa1-4f2b-ada4-f7399726518f/bin/utaipan/data/e437795a2/4c76c8df86754aa387866d0cb5428497/FLAGb32bd0b03 [2020-11-22 13:01:08,175 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c32e465b-6aa1-4f2b-ada4-f7399726518f/bin/utaipan/data/e437795a2/4c76c8df86754aa387866d0cb5428497 [2020-11-22 13:01:08,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:01:08,179 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:01:08,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:01:08,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:01:08,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:01:08,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:01:08" (1/1) ... [2020-11-22 13:01:08,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a726025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:08, skipping insertion in model container [2020-11-22 13:01:08,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:01:08" (1/1) ... [2020-11-22 13:01:08,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:01:08,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:01:08,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:01:08,630 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:01:08,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:01:08,788 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:01:08,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:08 WrapperNode [2020-11-22 13:01:08,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:01:08,791 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:01:08,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:01:08,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:01:08,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:08" (1/1) ... [2020-11-22 13:01:08,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:08" (1/1) ... [2020-11-22 13:01:08,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:01:08,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:01:08,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:01:08,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:01:08,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:08" (1/1) ... [2020-11-22 13:01:08,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:08" (1/1) ... [2020-11-22 13:01:08,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:08" (1/1) ... [2020-11-22 13:01:08,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:08" (1/1) ... [2020-11-22 13:01:08,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:08" (1/1) ... [2020-11-22 13:01:08,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:08" (1/1) ... [2020-11-22 13:01:08,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:08" (1/1) ... [2020-11-22 13:01:08,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:01:08,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:01:08,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:01:08,941 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:01:08,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c32e465b-6aa1-4f2b-ada4-f7399726518f/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 13:01:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 13:01:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-22 13:01:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:01:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:01:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-11-22 13:01:09,019 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-11-22 13:01:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-11-22 13:01:09,019 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-11-22 13:01:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-11-22 13:01:09,022 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-11-22 13:01:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:01:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-22 13:01:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:01:09,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:01:09,024 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 13:01:09,448 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:01:09,449 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-22 13:01:09,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:01:09 BoogieIcfgContainer [2020-11-22 13:01:09,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:01:09,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:01:09,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:01:09,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:01:09,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:01:08" (1/3) ... [2020-11-22 13:01:09,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11aefa28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:01:09, skipping insertion in model container [2020-11-22 13:01:09,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:08" (2/3) ... [2020-11-22 13:01:09,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11aefa28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:01:09, skipping insertion in model container [2020-11-22 13:01:09,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:01:09" (3/3) ... [2020-11-22 13:01:09,462 INFO L111 eAbstractionObserver]: Analyzing ICFG safe035_tso.oepc.i [2020-11-22 13:01:09,477 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-22 13:01:09,477 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:01:09,482 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 13:01:09,483 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-22 13:01:09,508 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,509 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,509 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,509 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,509 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,510 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,513 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,513 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,513 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,514 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,514 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,514 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,514 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,515 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,515 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,515 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,515 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,515 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,518 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,518 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,518 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,518 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,533 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,533 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,534 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,534 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,536 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,536 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,536 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,536 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 13:01:09,544 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-22 13:01:09,557 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-22 13:01:09,590 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:01:09,590 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:01:09,591 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:01:09,591 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:01:09,591 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:01:09,591 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:01:09,591 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:01:09,591 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:01:09,608 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-22 13:01:09,609 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 79 transitions, 173 flow [2020-11-22 13:01:09,613 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 79 transitions, 173 flow [2020-11-22 13:01:09,614 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 86 places, 79 transitions, 173 flow [2020-11-22 13:01:09,654 INFO L129 PetriNetUnfolder]: 3/76 cut-off events. [2020-11-22 13:01:09,654 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-22 13:01:09,658 INFO L80 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 76 events. 3/76 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2020-11-22 13:01:09,661 INFO L116 LiptonReduction]: Number of co-enabled transitions 1440 [2020-11-22 13:01:11,247 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-11-22 13:01:11,928 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-11-22 13:01:12,034 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-22 13:01:12,295 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-22 13:01:12,300 INFO L131 LiptonReduction]: Checked pairs total: 2778 [2020-11-22 13:01:12,300 INFO L133 LiptonReduction]: Total number of compositions: 68 [2020-11-22 13:01:12,305 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 23 transitions, 61 flow [2020-11-22 13:01:12,338 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 362 states. [2020-11-22 13:01:12,339 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states. [2020-11-22 13:01:12,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 13:01:12,346 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:12,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:12,347 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:12,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:12,352 INFO L82 PathProgramCache]: Analyzing trace with hash -345538935, now seen corresponding path program 1 times [2020-11-22 13:01:12,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:12,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541411263] [2020-11-22 13:01:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:12,520 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 13:01:12,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541411263] [2020-11-22 13:01:12,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:12,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:01:12,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736314840] [2020-11-22 13:01:12,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 13:01:12,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:12,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 13:01:12,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:01:12,542 INFO L87 Difference]: Start difference. First operand 362 states. Second operand 2 states. [2020-11-22 13:01:12,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:12,573 INFO L93 Difference]: Finished difference Result 362 states and 1072 transitions. [2020-11-22 13:01:12,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 13:01:12,578 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-22 13:01:12,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:12,594 INFO L225 Difference]: With dead ends: 362 [2020-11-22 13:01:12,594 INFO L226 Difference]: Without dead ends: 298 [2020-11-22 13:01:12,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:01:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-11-22 13:01:12,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2020-11-22 13:01:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-11-22 13:01:12,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 864 transitions. [2020-11-22 13:01:12,664 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 864 transitions. Word has length 8 [2020-11-22 13:01:12,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:12,666 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 864 transitions. [2020-11-22 13:01:12,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 13:01:12,666 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 864 transitions. [2020-11-22 13:01:12,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 13:01:12,667 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:12,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:12,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:01:12,668 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:12,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:12,669 INFO L82 PathProgramCache]: Analyzing trace with hash -2121797576, now seen corresponding path program 1 times [2020-11-22 13:01:12,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:12,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527696791] [2020-11-22 13:01:12,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:12,807 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 13:01:12,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527696791] [2020-11-22 13:01:12,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:12,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:01:12,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850150008] [2020-11-22 13:01:12,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:01:12,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:12,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:01:12,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:01:12,810 INFO L87 Difference]: Start difference. First operand 298 states and 864 transitions. Second operand 4 states. [2020-11-22 13:01:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:12,853 INFO L93 Difference]: Finished difference Result 298 states and 816 transitions. [2020-11-22 13:01:12,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:01:12,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-22 13:01:12,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:12,863 INFO L225 Difference]: With dead ends: 298 [2020-11-22 13:01:12,864 INFO L226 Difference]: Without dead ends: 234 [2020-11-22 13:01:12,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:01:12,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-11-22 13:01:12,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2020-11-22 13:01:12,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-11-22 13:01:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 640 transitions. [2020-11-22 13:01:12,893 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 640 transitions. Word has length 9 [2020-11-22 13:01:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:12,893 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 640 transitions. [2020-11-22 13:01:12,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:01:12,894 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 640 transitions. [2020-11-22 13:01:12,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 13:01:12,897 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:12,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:12,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:01:12,897 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:12,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:12,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1060758680, now seen corresponding path program 1 times [2020-11-22 13:01:12,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:12,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603170318] [2020-11-22 13:01:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:12,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:13,048 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 13:01:13,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603170318] [2020-11-22 13:01:13,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:13,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:01:13,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362590054] [2020-11-22 13:01:13,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:01:13,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:13,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:01:13,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:01:13,051 INFO L87 Difference]: Start difference. First operand 234 states and 640 transitions. Second operand 4 states. [2020-11-22 13:01:13,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:13,132 INFO L93 Difference]: Finished difference Result 346 states and 916 transitions. [2020-11-22 13:01:13,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:01:13,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-22 13:01:13,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:13,135 INFO L225 Difference]: With dead ends: 346 [2020-11-22 13:01:13,136 INFO L226 Difference]: Without dead ends: 164 [2020-11-22 13:01:13,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:01:13,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-11-22 13:01:13,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2020-11-22 13:01:13,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-11-22 13:01:13,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 432 transitions. [2020-11-22 13:01:13,144 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 432 transitions. Word has length 11 [2020-11-22 13:01:13,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:13,144 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 432 transitions. [2020-11-22 13:01:13,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:01:13,145 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 432 transitions. [2020-11-22 13:01:13,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 13:01:13,146 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:13,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:13,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:01:13,146 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:13,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:13,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1476250237, now seen corresponding path program 1 times [2020-11-22 13:01:13,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:13,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140436893] [2020-11-22 13:01:13,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:13,218 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 13:01:13,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140436893] [2020-11-22 13:01:13,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:13,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:01:13,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407049076] [2020-11-22 13:01:13,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:01:13,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:13,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:01:13,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:01:13,221 INFO L87 Difference]: Start difference. First operand 164 states and 432 transitions. Second operand 4 states. [2020-11-22 13:01:13,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:13,258 INFO L93 Difference]: Finished difference Result 183 states and 435 transitions. [2020-11-22 13:01:13,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:01:13,261 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-22 13:01:13,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:13,263 INFO L225 Difference]: With dead ends: 183 [2020-11-22 13:01:13,263 INFO L226 Difference]: Without dead ends: 131 [2020-11-22 13:01:13,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:01:13,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-22 13:01:13,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-11-22 13:01:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-11-22 13:01:13,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 303 transitions. [2020-11-22 13:01:13,273 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 303 transitions. Word has length 12 [2020-11-22 13:01:13,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:13,273 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 303 transitions. [2020-11-22 13:01:13,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:01:13,273 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 303 transitions. [2020-11-22 13:01:13,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 13:01:13,274 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:13,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:13,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:01:13,275 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:13,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:13,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1073724632, now seen corresponding path program 1 times [2020-11-22 13:01:13,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:13,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469691693] [2020-11-22 13:01:13,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:13,409 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 13:01:13,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469691693] [2020-11-22 13:01:13,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:13,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:01:13,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913375021] [2020-11-22 13:01:13,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:01:13,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:13,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:01:13,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:01:13,412 INFO L87 Difference]: Start difference. First operand 131 states and 303 transitions. Second operand 5 states. [2020-11-22 13:01:13,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:13,478 INFO L93 Difference]: Finished difference Result 118 states and 245 transitions. [2020-11-22 13:01:13,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:01:13,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-22 13:01:13,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:13,481 INFO L225 Difference]: With dead ends: 118 [2020-11-22 13:01:13,481 INFO L226 Difference]: Without dead ends: 87 [2020-11-22 13:01:13,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:01:13,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-22 13:01:13,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-11-22 13:01:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-22 13:01:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 172 transitions. [2020-11-22 13:01:13,487 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 172 transitions. Word has length 13 [2020-11-22 13:01:13,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:13,487 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 172 transitions. [2020-11-22 13:01:13,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:01:13,494 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 172 transitions. [2020-11-22 13:01:13,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-22 13:01:13,495 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:13,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:13,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 13:01:13,495 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:13,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:13,496 INFO L82 PathProgramCache]: Analyzing trace with hash 809328863, now seen corresponding path program 1 times [2020-11-22 13:01:13,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:13,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615608443] [2020-11-22 13:01:13,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:13,580 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 13:01:13,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615608443] [2020-11-22 13:01:13,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:13,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-22 13:01:13,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578104946] [2020-11-22 13:01:13,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:01:13,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:13,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:01:13,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:01:13,583 INFO L87 Difference]: Start difference. First operand 87 states and 172 transitions. Second operand 6 states. [2020-11-22 13:01:13,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:13,646 INFO L93 Difference]: Finished difference Result 76 states and 148 transitions. [2020-11-22 13:01:13,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 13:01:13,647 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-22 13:01:13,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:13,647 INFO L225 Difference]: With dead ends: 76 [2020-11-22 13:01:13,648 INFO L226 Difference]: Without dead ends: 67 [2020-11-22 13:01:13,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:01:13,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-22 13:01:13,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-11-22 13:01:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-22 13:01:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 132 transitions. [2020-11-22 13:01:13,652 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 132 transitions. Word has length 15 [2020-11-22 13:01:13,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:13,653 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 132 transitions. [2020-11-22 13:01:13,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:01:13,653 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 132 transitions. [2020-11-22 13:01:13,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-22 13:01:13,654 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:13,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:13,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 13:01:13,654 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:13,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:13,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1097223765, now seen corresponding path program 1 times [2020-11-22 13:01:13,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:13,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117669437] [2020-11-22 13:01:13,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:13,711 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 13:01:13,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117669437] [2020-11-22 13:01:13,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:13,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:01:13,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879026459] [2020-11-22 13:01:13,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:01:13,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:13,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:01:13,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:01:13,713 INFO L87 Difference]: Start difference. First operand 67 states and 132 transitions. Second operand 5 states. [2020-11-22 13:01:13,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:13,748 INFO L93 Difference]: Finished difference Result 87 states and 167 transitions. [2020-11-22 13:01:13,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:01:13,749 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-11-22 13:01:13,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:13,750 INFO L225 Difference]: With dead ends: 87 [2020-11-22 13:01:13,750 INFO L226 Difference]: Without dead ends: 40 [2020-11-22 13:01:13,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 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 13:01:13,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-22 13:01:13,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-11-22 13:01:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-22 13:01:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 66 transitions. [2020-11-22 13:01:13,753 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 66 transitions. Word has length 18 [2020-11-22 13:01:13,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:13,753 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 66 transitions. [2020-11-22 13:01:13,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:01:13,753 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 66 transitions. [2020-11-22 13:01:13,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-22 13:01:13,753 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:13,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:13,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 13:01:13,754 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:13,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:13,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1731427213, now seen corresponding path program 2 times [2020-11-22 13:01:13,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:13,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10169185] [2020-11-22 13:01:13,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:13,853 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 13:01:13,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10169185] [2020-11-22 13:01:13,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:13,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:01:13,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246294883] [2020-11-22 13:01:13,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:01:13,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:13,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:01:13,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:01:13,855 INFO L87 Difference]: Start difference. First operand 40 states and 66 transitions. Second operand 5 states. [2020-11-22 13:01:13,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:13,918 INFO L93 Difference]: Finished difference Result 39 states and 65 transitions. [2020-11-22 13:01:13,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:01:13,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-11-22 13:01:13,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:13,918 INFO L225 Difference]: With dead ends: 39 [2020-11-22 13:01:13,918 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:01:13,918 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 13:01:13,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:01:13,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:01:13,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:01:13,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:01:13,919 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-11-22 13:01:13,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:13,919 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:01:13,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:01:13,919 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:01:13,919 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:01:13,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-22 13:01:13,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:01:13 BasicIcfg [2020-11-22 13:01:13,922 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:01:13,923 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:01:13,923 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:01:13,923 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:01:13,924 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:01:09" (3/4) ... [2020-11-22 13:01:13,930 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:01:13,936 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-11-22 13:01:13,937 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-11-22 13:01:13,937 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2020-11-22 13:01:13,944 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-11-22 13:01:13,945 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-22 13:01:13,945 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:01:13,945 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:01:13,999 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c32e465b-6aa1-4f2b-ada4-f7399726518f/bin/utaipan/witness.graphml [2020-11-22 13:01:13,999 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:01:14,004 INFO L168 Benchmark]: Toolchain (without parser) took 5821.32 ms. Allocated memory was 92.3 MB in the beginning and 146.8 MB in the end (delta: 54.5 MB). Free memory was 58.8 MB in the beginning and 66.7 MB in the end (delta: -7.8 MB). Peak memory consumption was 47.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:14,004 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 92.3 MB. Free memory was 72.0 MB in the beginning and 72.0 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:01:14,005 INFO L168 Benchmark]: CACSL2BoogieTranslator took 605.13 ms. Allocated memory is still 92.3 MB. Free memory was 58.5 MB in the beginning and 49.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:14,005 INFO L168 Benchmark]: Boogie Procedure Inliner took 82.29 ms. Allocated memory is still 92.3 MB. Free memory was 49.3 MB in the beginning and 47.2 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:01:14,005 INFO L168 Benchmark]: Boogie Preprocessor took 52.84 ms. Allocated memory is still 92.3 MB. Free memory was 47.2 MB in the beginning and 46.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:01:14,006 INFO L168 Benchmark]: RCFGBuilder took 525.52 ms. Allocated memory is still 92.3 MB. Free memory was 46.1 MB in the beginning and 58.4 MB in the end (delta: -12.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:14,006 INFO L168 Benchmark]: TraceAbstraction took 4467.23 ms. Allocated memory was 92.3 MB in the beginning and 146.8 MB in the end (delta: 54.5 MB). Free memory was 57.8 MB in the beginning and 69.8 MB in the end (delta: -12.0 MB). Peak memory consumption was 41.6 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:14,007 INFO L168 Benchmark]: Witness Printer took 76.29 ms. Allocated memory is still 146.8 MB. Free memory was 68.8 MB in the beginning and 66.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:14,011 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 92.3 MB. Free memory was 72.0 MB in the beginning and 72.0 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 605.13 ms. Allocated memory is still 92.3 MB. Free memory was 58.5 MB in the beginning and 49.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 82.29 ms. Allocated memory is still 92.3 MB. Free memory was 49.3 MB in the beginning and 47.2 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.84 ms. Allocated memory is still 92.3 MB. Free memory was 47.2 MB in the beginning and 46.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 525.52 ms. Allocated memory is still 92.3 MB. Free memory was 46.1 MB in the beginning and 58.4 MB in the end (delta: -12.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4467.23 ms. Allocated memory was 92.3 MB in the beginning and 146.8 MB in the end (delta: 54.5 MB). Free memory was 57.8 MB in the beginning and 69.8 MB in the end (delta: -12.0 MB). Peak memory consumption was 41.6 MB. Max. memory is 16.1 GB. * Witness Printer took 76.29 ms. Allocated memory is still 146.8 MB. Free memory was 68.8 MB in the beginning and 66.7 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 999 VarBasedMoverChecksPositive, 33 VarBasedMoverChecksNegative, 6 SemBasedMoverChecksPositive, 27 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.3s, 82 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.6s, 86 PlacesBefore, 32 PlacesAfterwards, 79 TransitionsBefore, 23 TransitionsAfterwards, 1440 CoEnabledTransitionPairs, 6 FixpointIterations, 18 TrivialSequentialCompositions, 36 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 2 ChoiceCompositions, 68 TotalNumberOfCompositions, 2778 MoverChecksTotal - PositiveResult [Line: 17]: 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 4 procedures, 77 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.3s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: 178 SDtfs, 146 SDslu, 278 SDs, 0 SdLazy, 122 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=362occurred 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: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 3608 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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...