./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe005_tso.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0f7bfa2d-c260-409e-82a8-c68be822a051/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0f7bfa2d-c260-409e-82a8-c68be822a051/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0f7bfa2d-c260-409e-82a8-c68be822a051/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0f7bfa2d-c260-409e-82a8-c68be822a051/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe005_tso.opt.i -s /tmp/vcloud-vcloud-master/worker/run_dir_0f7bfa2d-c260-409e-82a8-c68be822a051/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0f7bfa2d-c260-409e-82a8-c68be822a051/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 8ed4e776f61f45179464b0c5963a32fbca5f06af ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 20:20:34,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 20:20:34,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 20:20:34,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 20:20:34,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 20:20:34,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 20:20:34,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 20:20:34,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 20:20:34,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 20:20:34,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 20:20:34,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 20:20:34,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 20:20:34,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 20:20:34,983 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 20:20:34,984 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 20:20:34,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 20:20:34,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 20:20:34,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 20:20:34,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 20:20:34,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 20:20:34,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 20:20:34,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 20:20:34,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 20:20:34,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 20:20:35,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 20:20:35,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 20:20:35,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 20:20:35,002 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 20:20:35,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 20:20:35,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 20:20:35,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 20:20:35,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 20:20:35,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 20:20:35,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 20:20:35,007 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 20:20:35,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 20:20:35,008 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 20:20:35,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 20:20:35,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 20:20:35,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 20:20:35,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 20:20:35,010 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0f7bfa2d-c260-409e-82a8-c68be822a051/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 20:20:35,026 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 20:20:35,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 20:20:35,027 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 20:20:35,027 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 20:20:35,027 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 20:20:35,027 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 20:20:35,027 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 20:20:35,027 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 20:20:35,028 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 20:20:35,028 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 20:20:35,028 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 20:20:35,028 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 20:20:35,028 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 20:20:35,028 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 20:20:35,028 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 20:20:35,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 20:20:35,029 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 20:20:35,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 20:20:35,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 20:20:35,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 20:20:35,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 20:20:35,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 20:20:35,030 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 20:20:35,030 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 20:20:35,030 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 20:20:35,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 20:20:35,030 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 20:20:35,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 20:20:35,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 20:20:35,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 20:20:35,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:20:35,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 20:20:35,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 20:20:35,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 20:20:35,031 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 20:20:35,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 20:20:35,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 20:20:35,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 20:20:35,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 20:20:35,032 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_0f7bfa2d-c260-409e-82a8-c68be822a051/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0f7bfa2d-c260-409e-82a8-c68be822a051/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ed4e776f61f45179464b0c5963a32fbca5f06af [2020-12-09 20:20:35,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 20:20:35,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 20:20:35,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 20:20:35,236 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 20:20:35,237 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 20:20:35,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0f7bfa2d-c260-409e-82a8-c68be822a051/bin/utaipan/../../sv-benchmarks/c/pthread-wmm/safe005_tso.opt.i [2020-12-09 20:20:35,278 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0f7bfa2d-c260-409e-82a8-c68be822a051/bin/utaipan/data/5620c66ea/1295b57471494fe7870747fcea0ede99/FLAGc37f93917 [2020-12-09 20:20:35,690 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 20:20:35,690 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0f7bfa2d-c260-409e-82a8-c68be822a051/sv-benchmarks/c/pthread-wmm/safe005_tso.opt.i [2020-12-09 20:20:35,701 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0f7bfa2d-c260-409e-82a8-c68be822a051/bin/utaipan/data/5620c66ea/1295b57471494fe7870747fcea0ede99/FLAGc37f93917 [2020-12-09 20:20:35,710 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0f7bfa2d-c260-409e-82a8-c68be822a051/bin/utaipan/data/5620c66ea/1295b57471494fe7870747fcea0ede99 [2020-12-09 20:20:35,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 20:20:35,713 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 20:20:35,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 20:20:35,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 20:20:35,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 20:20:35,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:20:35" (1/1) ... [2020-12-09 20:20:35,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ede4ded and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:35, skipping insertion in model container [2020-12-09 20:20:35,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:20:35" (1/1) ... [2020-12-09 20:20:35,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 20:20:35,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 20:20:35,852 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_0f7bfa2d-c260-409e-82a8-c68be822a051/sv-benchmarks/c/pthread-wmm/safe005_tso.opt.i[949,962] [2020-12-09 20:20:35,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:20:35,963 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 20:20:35,971 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_0f7bfa2d-c260-409e-82a8-c68be822a051/sv-benchmarks/c/pthread-wmm/safe005_tso.opt.i[949,962] [2020-12-09 20:20:35,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:20:36,044 INFO L208 MainTranslator]: Completed translation [2020-12-09 20:20:36,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:36 WrapperNode [2020-12-09 20:20:36,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 20:20:36,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 20:20:36,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 20:20:36,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 20:20:36,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:36" (1/1) ... [2020-12-09 20:20:36,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:36" (1/1) ... [2020-12-09 20:20:36,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 20:20:36,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 20:20:36,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 20:20:36,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 20:20:36,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:36" (1/1) ... [2020-12-09 20:20:36,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:36" (1/1) ... [2020-12-09 20:20:36,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:36" (1/1) ... [2020-12-09 20:20:36,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:36" (1/1) ... [2020-12-09 20:20:36,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:36" (1/1) ... [2020-12-09 20:20:36,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:36" (1/1) ... [2020-12-09 20:20:36,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:36" (1/1) ... [2020-12-09 20:20:36,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 20:20:36,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 20:20:36,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 20:20:36,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 20:20:36,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f7bfa2d-c260-409e-82a8-c68be822a051/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 [2020-12-09 20:20:36,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 20:20:36,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-09 20:20:36,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 20:20:36,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 20:20:36,155 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-12-09 20:20:36,155 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-12-09 20:20:36,155 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-12-09 20:20:36,155 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-12-09 20:20:36,155 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-12-09 20:20:36,155 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-12-09 20:20:36,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 20:20:36,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-09 20:20:36,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 20:20:36,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 20:20:36,157 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-09 20:20:36,368 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 20:20:36,368 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 20:20:36,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:20:36 BoogieIcfgContainer [2020-12-09 20:20:36,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 20:20:36,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 20:20:36,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 20:20:36,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 20:20:36,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:20:35" (1/3) ... [2020-12-09 20:20:36,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51525d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:20:36, skipping insertion in model container [2020-12-09 20:20:36,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:36" (2/3) ... [2020-12-09 20:20:36,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51525d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:20:36, skipping insertion in model container [2020-12-09 20:20:36,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:20:36" (3/3) ... [2020-12-09 20:20:36,377 INFO L111 eAbstractionObserver]: Analyzing ICFG safe005_tso.opt.i [2020-12-09 20:20:36,387 WARN L169 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-09 20:20:36,387 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 20:20:36,389 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 20:20:36,390 INFO L354 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-09 20:20:36,413 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,413 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,414 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,414 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,414 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,414 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,414 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,414 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,415 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,415 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,415 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,415 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,416 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,416 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,416 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,416 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,417 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,417 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,417 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,417 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,417 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,418 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,418 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,418 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,418 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,418 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,423 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,423 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,423 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,423 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,423 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,424 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,424 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,424 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,425 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,425 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,427 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,427 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,428 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,428 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,432 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,433 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,433 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,433 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,435 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,436 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,436 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,436 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:20:36,438 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-09 20:20:36,449 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-09 20:20:36,469 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 20:20:36,469 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 20:20:36,469 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 20:20:36,469 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 20:20:36,469 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 20:20:36,469 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 20:20:36,470 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 20:20:36,470 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 20:20:36,481 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-09 20:20:36,483 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 75 transitions, 165 flow [2020-12-09 20:20:36,486 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 75 transitions, 165 flow [2020-12-09 20:20:36,487 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 83 places, 75 transitions, 165 flow [2020-12-09 20:20:36,527 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2020-12-09 20:20:36,528 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-09 20:20:36,532 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 72 events. 2/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 56. Up to 2 conditions per place. [2020-12-09 20:20:36,535 INFO L116 LiptonReduction]: Number of co-enabled transitions 1296 [2020-12-09 20:20:38,511 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-12-09 20:20:38,723 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-12-09 20:20:38,820 INFO L131 LiptonReduction]: Checked pairs total: 2371 [2020-12-09 20:20:38,820 INFO L133 LiptonReduction]: Total number of compositions: 63 [2020-12-09 20:20:38,824 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 21 transitions, 57 flow [2020-12-09 20:20:38,840 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 298 states. [2020-12-09 20:20:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states. [2020-12-09 20:20:38,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 20:20:38,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:20:38,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:20:38,846 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:20:38,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:20:38,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1684989787, now seen corresponding path program 1 times [2020-12-09 20:20:38,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:20:38,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221930773] [2020-12-09 20:20:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:20:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:20:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:20:39,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221930773] [2020-12-09 20:20:39,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:20:39,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 20:20:39,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754293142] [2020-12-09 20:20:39,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:20:39,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:20:39,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:20:39,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:20:39,038 INFO L87 Difference]: Start difference. First operand 298 states. Second operand 3 states. [2020-12-09 20:20:39,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:20:39,095 INFO L93 Difference]: Finished difference Result 468 states and 1286 transitions. [2020-12-09 20:20:39,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:20:39,096 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-09 20:20:39,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:20:39,110 INFO L225 Difference]: With dead ends: 468 [2020-12-09 20:20:39,110 INFO L226 Difference]: Without dead ends: 292 [2020-12-09 20:20:39,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:20:39,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-12-09 20:20:39,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 250. [2020-12-09 20:20:39,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-12-09 20:20:39,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 640 transitions. [2020-12-09 20:20:39,170 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 640 transitions. Word has length 8 [2020-12-09 20:20:39,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:20:39,170 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 640 transitions. [2020-12-09 20:20:39,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:20:39,171 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 640 transitions. [2020-12-09 20:20:39,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 20:20:39,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:20:39,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:20:39,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 20:20:39,172 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:20:39,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:20:39,173 INFO L82 PathProgramCache]: Analyzing trace with hash 695081323, now seen corresponding path program 1 times [2020-12-09 20:20:39,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:20:39,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129762460] [2020-12-09 20:20:39,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:20:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:20:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:20:39,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129762460] [2020-12-09 20:20:39,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:20:39,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 20:20:39,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018343240] [2020-12-09 20:20:39,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:20:39,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:20:39,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:20:39,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:20:39,236 INFO L87 Difference]: Start difference. First operand 250 states and 640 transitions. Second operand 3 states. [2020-12-09 20:20:39,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:20:39,244 INFO L93 Difference]: Finished difference Result 226 states and 558 transitions. [2020-12-09 20:20:39,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:20:39,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-09 20:20:39,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:20:39,247 INFO L225 Difference]: With dead ends: 226 [2020-12-09 20:20:39,247 INFO L226 Difference]: Without dead ends: 174 [2020-12-09 20:20:39,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:20:39,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-09 20:20:39,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 158. [2020-12-09 20:20:39,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-09 20:20:39,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 398 transitions. [2020-12-09 20:20:39,256 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 398 transitions. Word has length 9 [2020-12-09 20:20:39,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:20:39,257 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 398 transitions. [2020-12-09 20:20:39,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:20:39,257 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 398 transitions. [2020-12-09 20:20:39,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 20:20:39,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:20:39,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:20:39,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 20:20:39,259 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:20:39,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:20:39,259 INFO L82 PathProgramCache]: Analyzing trace with hash -2036864499, now seen corresponding path program 1 times [2020-12-09 20:20:39,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:20:39,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686011561] [2020-12-09 20:20:39,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:20:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:20:39,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:20:39,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686011561] [2020-12-09 20:20:39,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:20:39,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:20:39,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871155011] [2020-12-09 20:20:39,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:20:39,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:20:39,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:20:39,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:20:39,309 INFO L87 Difference]: Start difference. First operand 158 states and 398 transitions. Second operand 4 states. [2020-12-09 20:20:39,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:20:39,325 INFO L93 Difference]: Finished difference Result 230 states and 562 transitions. [2020-12-09 20:20:39,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:20:39,325 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 20:20:39,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:20:39,326 INFO L225 Difference]: With dead ends: 230 [2020-12-09 20:20:39,326 INFO L226 Difference]: Without dead ends: 134 [2020-12-09 20:20:39,326 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 [2020-12-09 20:20:39,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-09 20:20:39,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-12-09 20:20:39,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-09 20:20:39,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 318 transitions. [2020-12-09 20:20:39,332 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 318 transitions. Word has length 11 [2020-12-09 20:20:39,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:20:39,332 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 318 transitions. [2020-12-09 20:20:39,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:20:39,332 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 318 transitions. [2020-12-09 20:20:39,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 20:20:39,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:20:39,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:20:39,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 20:20:39,334 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:20:39,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:20:39,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1140467669, now seen corresponding path program 1 times [2020-12-09 20:20:39,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:20:39,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418636929] [2020-12-09 20:20:39,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:20:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:20:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:20:39,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418636929] [2020-12-09 20:20:39,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:20:39,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:20:39,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884697028] [2020-12-09 20:20:39,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:20:39,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:20:39,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:20:39,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:20:39,383 INFO L87 Difference]: Start difference. First operand 134 states and 318 transitions. Second operand 5 states. [2020-12-09 20:20:39,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:20:39,423 INFO L93 Difference]: Finished difference Result 218 states and 496 transitions. [2020-12-09 20:20:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 20:20:39,423 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 20:20:39,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:20:39,424 INFO L225 Difference]: With dead ends: 218 [2020-12-09 20:20:39,424 INFO L226 Difference]: Without dead ends: 126 [2020-12-09 20:20:39,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 20:20:39,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-09 20:20:39,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2020-12-09 20:20:39,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-09 20:20:39,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 216 transitions. [2020-12-09 20:20:39,428 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 216 transitions. Word has length 12 [2020-12-09 20:20:39,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:20:39,428 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 216 transitions. [2020-12-09 20:20:39,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:20:39,429 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 216 transitions. [2020-12-09 20:20:39,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 20:20:39,429 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:20:39,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:20:39,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 20:20:39,430 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:20:39,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:20:39,430 INFO L82 PathProgramCache]: Analyzing trace with hash -841103600, now seen corresponding path program 1 times [2020-12-09 20:20:39,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:20:39,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642441846] [2020-12-09 20:20:39,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:20:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:20:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:20:39,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642441846] [2020-12-09 20:20:39,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:20:39,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:20:39,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036992641] [2020-12-09 20:20:39,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:20:39,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:20:39,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:20:39,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:20:39,469 INFO L87 Difference]: Start difference. First operand 98 states and 216 transitions. Second operand 4 states. [2020-12-09 20:20:39,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:20:39,486 INFO L93 Difference]: Finished difference Result 116 states and 237 transitions. [2020-12-09 20:20:39,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:20:39,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-09 20:20:39,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:20:39,487 INFO L225 Difference]: With dead ends: 116 [2020-12-09 20:20:39,487 INFO L226 Difference]: Without dead ends: 84 [2020-12-09 20:20:39,488 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 [2020-12-09 20:20:39,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-09 20:20:39,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-12-09 20:20:39,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-09 20:20:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 169 transitions. [2020-12-09 20:20:39,491 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 169 transitions. Word has length 13 [2020-12-09 20:20:39,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:20:39,492 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 169 transitions. [2020-12-09 20:20:39,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:20:39,492 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 169 transitions. [2020-12-09 20:20:39,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 20:20:39,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:20:39,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:20:39,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 20:20:39,493 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:20:39,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:20:39,493 INFO L82 PathProgramCache]: Analyzing trace with hash -646597307, now seen corresponding path program 1 times [2020-12-09 20:20:39,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:20:39,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914823637] [2020-12-09 20:20:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:20:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:20:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:20:39,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914823637] [2020-12-09 20:20:39,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:20:39,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:20:39,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904041438] [2020-12-09 20:20:39,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:20:39,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:20:39,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:20:39,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:20:39,545 INFO L87 Difference]: Start difference. First operand 84 states and 169 transitions. Second operand 5 states. [2020-12-09 20:20:39,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:20:39,567 INFO L93 Difference]: Finished difference Result 86 states and 160 transitions. [2020-12-09 20:20:39,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:20:39,567 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-09 20:20:39,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:20:39,568 INFO L225 Difference]: With dead ends: 86 [2020-12-09 20:20:39,568 INFO L226 Difference]: Without dead ends: 66 [2020-12-09 20:20:39,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 20:20:39,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-09 20:20:39,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-09 20:20:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-09 20:20:39,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 118 transitions. [2020-12-09 20:20:39,570 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 118 transitions. Word has length 14 [2020-12-09 20:20:39,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:20:39,570 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 118 transitions. [2020-12-09 20:20:39,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:20:39,571 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 118 transitions. [2020-12-09 20:20:39,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 20:20:39,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:20:39,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:20:39,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 20:20:39,571 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:20:39,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:20:39,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1430343700, now seen corresponding path program 1 times [2020-12-09 20:20:39,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:20:39,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133547347] [2020-12-09 20:20:39,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:20:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:20:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:20:39,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133547347] [2020-12-09 20:20:39,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:20:39,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:20:39,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710754818] [2020-12-09 20:20:39,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 20:20:39,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:20:39,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 20:20:39,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:20:39,612 INFO L87 Difference]: Start difference. First operand 66 states and 118 transitions. Second operand 6 states. [2020-12-09 20:20:39,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:20:39,642 INFO L93 Difference]: Finished difference Result 63 states and 110 transitions. [2020-12-09 20:20:39,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:20:39,642 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-09 20:20:39,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:20:39,643 INFO L225 Difference]: With dead ends: 63 [2020-12-09 20:20:39,643 INFO L226 Difference]: Without dead ends: 56 [2020-12-09 20:20:39,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-09 20:20:39,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-09 20:20:39,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2020-12-09 20:20:39,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-09 20:20:39,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 90 transitions. [2020-12-09 20:20:39,645 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 90 transitions. Word has length 15 [2020-12-09 20:20:39,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:20:39,645 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 90 transitions. [2020-12-09 20:20:39,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 20:20:39,645 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 90 transitions. [2020-12-09 20:20:39,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 20:20:39,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:20:39,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:20:39,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 20:20:39,646 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:20:39,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:20:39,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1271805033, now seen corresponding path program 1 times [2020-12-09 20:20:39,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:20:39,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791872928] [2020-12-09 20:20:39,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:20:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:20:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:20:39,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791872928] [2020-12-09 20:20:39,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:20:39,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:20:39,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244832140] [2020-12-09 20:20:39,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:20:39,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:20:39,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:20:39,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:20:39,676 INFO L87 Difference]: Start difference. First operand 52 states and 90 transitions. Second operand 4 states. [2020-12-09 20:20:39,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:20:39,690 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2020-12-09 20:20:39,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:20:39,690 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-09 20:20:39,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:20:39,690 INFO L225 Difference]: With dead ends: 51 [2020-12-09 20:20:39,690 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 20:20:39,691 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 [2020-12-09 20:20:39,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 20:20:39,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 20:20:39,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 20:20:39,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 20:20:39,691 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-12-09 20:20:39,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:20:39,691 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 20:20:39,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:20:39,691 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 20:20:39,692 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 20:20:39,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 20:20:39,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:20:39 BasicIcfg [2020-12-09 20:20:39,694 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 20:20:39,694 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 20:20:39,694 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 20:20:39,694 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 20:20:39,695 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:20:36" (3/4) ... [2020-12-09 20:20:39,697 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 20:20:39,701 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-12-09 20:20:39,701 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-12-09 20:20:39,701 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2020-12-09 20:20:39,705 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-12-09 20:20:39,705 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 20:20:39,705 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 20:20:39,705 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 20:20:39,732 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0f7bfa2d-c260-409e-82a8-c68be822a051/bin/utaipan/witness.graphml [2020-12-09 20:20:39,732 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 20:20:39,733 INFO L168 Benchmark]: Toolchain (without parser) took 4019.83 ms. Allocated memory was 86.0 MB in the beginning and 157.3 MB in the end (delta: 71.3 MB). Free memory was 62.8 MB in the beginning and 129.2 MB in the end (delta: -66.4 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2020-12-09 20:20:39,734 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 86.0 MB. Free memory is still 60.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:20:39,734 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.33 ms. Allocated memory is still 86.0 MB. Free memory was 62.6 MB in the beginning and 44.9 MB in the end (delta: 17.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-09 20:20:39,734 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.63 ms. Allocated memory is still 86.0 MB. Free memory was 44.9 MB in the beginning and 43.0 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:20:39,735 INFO L168 Benchmark]: Boogie Preprocessor took 18.41 ms. Allocated memory is still 86.0 MB. Free memory was 43.0 MB in the beginning and 41.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:20:39,735 INFO L168 Benchmark]: RCFGBuilder took 274.21 ms. Allocated memory is still 86.0 MB. Free memory was 41.8 MB in the beginning and 44.4 MB in the end (delta: -2.6 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. [2020-12-09 20:20:39,736 INFO L168 Benchmark]: TraceAbstraction took 3322.44 ms. Allocated memory was 86.0 MB in the beginning and 157.3 MB in the end (delta: 71.3 MB). Free memory was 44.0 MB in the beginning and 131.3 MB in the end (delta: -87.4 MB). Peak memory consumption was 62.7 MB. Max. memory is 16.1 GB. [2020-12-09 20:20:39,736 INFO L168 Benchmark]: Witness Printer took 38.43 ms. Allocated memory is still 157.3 MB. Free memory was 131.3 MB in the beginning and 129.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 20:20:39,738 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 86.0 MB. Free memory is still 60.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 331.33 ms. Allocated memory is still 86.0 MB. Free memory was 62.6 MB in the beginning and 44.9 MB in the end (delta: 17.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.63 ms. Allocated memory is still 86.0 MB. Free memory was 44.9 MB in the beginning and 43.0 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.41 ms. Allocated memory is still 86.0 MB. Free memory was 43.0 MB in the beginning and 41.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 274.21 ms. Allocated memory is still 86.0 MB. Free memory was 41.8 MB in the beginning and 44.4 MB in the end (delta: -2.6 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3322.44 ms. Allocated memory was 86.0 MB in the beginning and 157.3 MB in the end (delta: 71.3 MB). Free memory was 44.0 MB in the beginning and 131.3 MB in the end (delta: -87.4 MB). Peak memory consumption was 62.7 MB. Max. memory is 16.1 GB. * Witness Printer took 38.43 ms. Allocated memory is still 157.3 MB. Free memory was 131.3 MB in the beginning and 129.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 845 VarBasedMoverChecksPositive, 42 VarBasedMoverChecksNegative, 11 SemBasedMoverChecksPositive, 31 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 68 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.3s, 83 PlacesBefore, 31 PlacesAfterwards, 75 TransitionsBefore, 21 TransitionsAfterwards, 1296 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 37 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 2 ChoiceCompositions, 63 TotalNumberOfCompositions, 2371 MoverChecksTotal - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 74 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.2s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 137 SDtfs, 172 SDslu, 150 SDs, 0 SdLazy, 84 SolverSat, 50 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=298occurred 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, 8 MinimizatonAttempts, 90 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 4001 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...