./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe006_tso.opt.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_f9833cf6-c379-4875-86d0-6a33665edbb4/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f9833cf6-c379-4875-86d0-6a33665edbb4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f9833cf6-c379-4875-86d0-6a33665edbb4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f9833cf6-c379-4875-86d0-6a33665edbb4/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe006_tso.opt.i -s /tmp/vcloud-vcloud-master/worker/run_dir_f9833cf6-c379-4875-86d0-6a33665edbb4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f9833cf6-c379-4875-86d0-6a33665edbb4/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 df23f0209046563f2c8cd43b2cbc25b8b8444cdc ........................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:57:08,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:57:08,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:57:08,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:57:08,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:57:08,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:57:08,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:57:08,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:57:08,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:57:08,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:57:08,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:57:08,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:57:08,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:57:08,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:57:08,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:57:08,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:57:08,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:57:08,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:57:08,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:57:08,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:57:08,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:57:08,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:57:08,240 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:57:08,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:57:08,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:57:08,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:57:08,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:57:08,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:57:08,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:57:08,260 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:57:08,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:57:08,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:57:08,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:57:08,265 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:57:08,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:57:08,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:57:08,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:57:08,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:57:08,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:57:08,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:57:08,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:57:08,273 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f9833cf6-c379-4875-86d0-6a33665edbb4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:57:08,321 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:57:08,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:57:08,323 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:57:08,323 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:57:08,323 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:57:08,324 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:57:08,324 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:57:08,324 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:57:08,324 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:57:08,325 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:57:08,326 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:57:08,326 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:57:08,326 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:57:08,327 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:57:08,327 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:57:08,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:57:08,328 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:57:08,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:57:08,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:57:08,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:57:08,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:57:08,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:57:08,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:57:08,337 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:57:08,337 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:57:08,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:57:08,337 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:57:08,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:57:08,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:57:08,338 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:57:08,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:57:08,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:57:08,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:57:08,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:57:08,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:57:08,340 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:57:08,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:57:08,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:57:08,340 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:57:08,341 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:57:08,341 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_f9833cf6-c379-4875-86d0-6a33665edbb4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f9833cf6-c379-4875-86d0-6a33665edbb4/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df23f0209046563f2c8cd43b2cbc25b8b8444cdc [2020-11-22 12:57:08,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:57:08,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:57:08,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:57:08,691 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:57:08,694 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:57:08,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f9833cf6-c379-4875-86d0-6a33665edbb4/bin/utaipan/../../sv-benchmarks/c/pthread-wmm/safe006_tso.opt.i [2020-11-22 12:57:08,760 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f9833cf6-c379-4875-86d0-6a33665edbb4/bin/utaipan/data/5f19b9167/b29ba79163df4e5daa09c7d78e713258/FLAGba80465dc [2020-11-22 12:57:09,397 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:57:09,399 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f9833cf6-c379-4875-86d0-6a33665edbb4/sv-benchmarks/c/pthread-wmm/safe006_tso.opt.i [2020-11-22 12:57:09,454 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f9833cf6-c379-4875-86d0-6a33665edbb4/bin/utaipan/data/5f19b9167/b29ba79163df4e5daa09c7d78e713258/FLAGba80465dc [2020-11-22 12:57:09,657 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f9833cf6-c379-4875-86d0-6a33665edbb4/bin/utaipan/data/5f19b9167/b29ba79163df4e5daa09c7d78e713258 [2020-11-22 12:57:09,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:57:09,662 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:57:09,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:57:09,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:57:09,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:57:09,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:57:09" (1/1) ... [2020-11-22 12:57:09,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f8cc0da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:09, skipping insertion in model container [2020-11-22 12:57:09,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:57:09" (1/1) ... [2020-11-22 12:57:09,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:57:09,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:57:10,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:57:10,179 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:57:10,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:57:10,304 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:57:10,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:10 WrapperNode [2020-11-22 12:57:10,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:57:10,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:57:10,308 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:57:10,308 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:57:10,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:10" (1/1) ... [2020-11-22 12:57:10,353 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:10" (1/1) ... [2020-11-22 12:57:10,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:57:10,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:57:10,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:57:10,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:57:10,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:10" (1/1) ... [2020-11-22 12:57:10,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:10" (1/1) ... [2020-11-22 12:57:10,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:10" (1/1) ... [2020-11-22 12:57:10,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:10" (1/1) ... [2020-11-22 12:57:10,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:10" (1/1) ... [2020-11-22 12:57:10,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:10" (1/1) ... [2020-11-22 12:57:10,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:10" (1/1) ... [2020-11-22 12:57:10,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:57:10,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:57:10,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:57:10,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:57:10,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f9833cf6-c379-4875-86d0-6a33665edbb4/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:57:10,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 12:57:10,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-22 12:57:10,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:57:10,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 12:57:10,517 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-11-22 12:57:10,517 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-11-22 12:57:10,517 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-11-22 12:57:10,518 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-11-22 12:57:10,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:57:10,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-22 12:57:10,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:57:10,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:57:10,521 WARN L208 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-22 12:57:11,063 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:57:11,064 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-22 12:57:11,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:57:11 BoogieIcfgContainer [2020-11-22 12:57:11,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:57:11,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:57:11,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:57:11,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:57:11,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:57:09" (1/3) ... [2020-11-22 12:57:11,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323d9dd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:57:11, skipping insertion in model container [2020-11-22 12:57:11,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:10" (2/3) ... [2020-11-22 12:57:11,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323d9dd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:57:11, skipping insertion in model container [2020-11-22 12:57:11,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:57:11" (3/3) ... [2020-11-22 12:57:11,075 INFO L111 eAbstractionObserver]: Analyzing ICFG safe006_tso.opt.i [2020-11-22 12:57:11,087 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-22 12:57:11,087 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:57:11,092 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 12:57:11,093 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-22 12:57:11,129 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:11,129 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:11,130 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:11,130 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:11,130 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:11,130 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:11,131 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:11,131 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:11,131 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:11,132 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:11,132 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:11,132 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:11,135 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:11,136 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:11,136 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:11,136 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:11,143 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:11,144 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:11,144 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:11,144 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:57:11,148 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-22 12:57:11,160 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-22 12:57:11,192 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:57:11,192 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:57:11,193 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:57:11,193 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:57:11,194 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:57:11,194 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:57:11,194 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:57:11,194 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:57:11,208 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-22 12:57:11,210 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 65 transitions, 140 flow [2020-11-22 12:57:11,214 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 65 transitions, 140 flow [2020-11-22 12:57:11,216 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 69 places, 65 transitions, 140 flow [2020-11-22 12:57:11,268 INFO L129 PetriNetUnfolder]: 3/63 cut-off events. [2020-11-22 12:57:11,269 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-22 12:57:11,272 INFO L80 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 63 events. 3/63 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-11-22 12:57:11,277 INFO L116 LiptonReduction]: Number of co-enabled transitions 792 [2020-11-22 12:57:13,218 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-11-22 12:57:13,611 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-11-22 12:57:13,740 INFO L131 LiptonReduction]: Checked pairs total: 1892 [2020-11-22 12:57:13,740 INFO L133 LiptonReduction]: Total number of compositions: 66 [2020-11-22 12:57:13,745 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 17 transitions, 44 flow [2020-11-22 12:57:13,755 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 90 states. [2020-11-22 12:57:13,758 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states. [2020-11-22 12:57:13,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 12:57:13,763 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:13,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 12:57:13,764 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:13,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:13,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1281927427, now seen corresponding path program 1 times [2020-11-22 12:57:13,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:13,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149945817] [2020-11-22 12:57:13,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:13,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149945817] [2020-11-22 12:57:13,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:13,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:57:13,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879705748] [2020-11-22 12:57:13,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 12:57:13,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:13,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 12:57:13,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 12:57:13,994 INFO L87 Difference]: Start difference. First operand 90 states. Second operand 2 states. [2020-11-22 12:57:14,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:14,017 INFO L93 Difference]: Finished difference Result 90 states and 200 transitions. [2020-11-22 12:57:14,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 12:57:14,019 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-22 12:57:14,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:14,027 INFO L225 Difference]: With dead ends: 90 [2020-11-22 12:57:14,027 INFO L226 Difference]: Without dead ends: 74 [2020-11-22 12:57:14,029 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 12:57:14,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-22 12:57:14,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-11-22 12:57:14,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-22 12:57:14,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2020-11-22 12:57:14,068 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 6 [2020-11-22 12:57:14,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:14,069 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2020-11-22 12:57:14,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 12:57:14,069 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2020-11-22 12:57:14,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 12:57:14,070 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:14,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:14,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:57:14,071 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:14,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:14,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1085050971, now seen corresponding path program 1 times [2020-11-22 12:57:14,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:14,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870055691] [2020-11-22 12:57:14,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:14,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870055691] [2020-11-22 12:57:14,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:14,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:57:14,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089143209] [2020-11-22 12:57:14,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:57:14,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:14,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:57:14,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:57:14,233 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 4 states. [2020-11-22 12:57:14,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:14,268 INFO L93 Difference]: Finished difference Result 82 states and 166 transitions. [2020-11-22 12:57:14,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:57:14,270 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-22 12:57:14,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:14,271 INFO L225 Difference]: With dead ends: 82 [2020-11-22 12:57:14,271 INFO L226 Difference]: Without dead ends: 66 [2020-11-22 12:57:14,271 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 12:57:14,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-22 12:57:14,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-11-22 12:57:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-22 12:57:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 138 transitions. [2020-11-22 12:57:14,280 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 138 transitions. Word has length 7 [2020-11-22 12:57:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:14,280 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 138 transitions. [2020-11-22 12:57:14,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:57:14,281 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 138 transitions. [2020-11-22 12:57:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 12:57:14,281 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:14,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:14,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 12:57:14,282 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:14,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:14,282 INFO L82 PathProgramCache]: Analyzing trace with hash 722349434, now seen corresponding path program 1 times [2020-11-22 12:57:14,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:14,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933578722] [2020-11-22 12:57:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:14,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933578722] [2020-11-22 12:57:14,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:14,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 12:57:14,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830801280] [2020-11-22 12:57:14,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:57:14,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:14,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:57:14,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:57:14,381 INFO L87 Difference]: Start difference. First operand 66 states and 138 transitions. Second operand 6 states. [2020-11-22 12:57:14,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:14,542 INFO L93 Difference]: Finished difference Result 78 states and 155 transitions. [2020-11-22 12:57:14,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 12:57:14,543 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-11-22 12:57:14,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:14,544 INFO L225 Difference]: With dead ends: 78 [2020-11-22 12:57:14,544 INFO L226 Difference]: Without dead ends: 42 [2020-11-22 12:57:14,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-11-22 12:57:14,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-22 12:57:14,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-22 12:57:14,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-22 12:57:14,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 76 transitions. [2020-11-22 12:57:14,550 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 76 transitions. Word has length 8 [2020-11-22 12:57:14,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:14,550 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 76 transitions. [2020-11-22 12:57:14,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:57:14,550 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 76 transitions. [2020-11-22 12:57:14,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 12:57:14,551 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:14,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:14,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 12:57:14,551 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:14,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:14,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1631439828, now seen corresponding path program 1 times [2020-11-22 12:57:14,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:14,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914730493] [2020-11-22 12:57:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:14,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914730493] [2020-11-22 12:57:14,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:14,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 12:57:14,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720275773] [2020-11-22 12:57:14,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:57:14,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:14,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:57:14,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:57:14,679 INFO L87 Difference]: Start difference. First operand 42 states and 76 transitions. Second operand 6 states. [2020-11-22 12:57:14,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:14,795 INFO L93 Difference]: Finished difference Result 36 states and 63 transitions. [2020-11-22 12:57:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 12:57:14,796 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-22 12:57:14,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:14,796 INFO L225 Difference]: With dead ends: 36 [2020-11-22 12:57:14,796 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:57:14,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-11-22 12:57:14,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:57:14,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:57:14,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:57:14,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:57:14,797 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-11-22 12:57:14,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:14,797 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:57:14,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:57:14,798 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:57:14,798 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:57:14,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 12:57:14,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:57:14 BasicIcfg [2020-11-22 12:57:14,801 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:57:14,801 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:57:14,801 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:57:14,804 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:57:14,804 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:57:11" (3/4) ... [2020-11-22 12:57:14,807 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:57:14,813 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-11-22 12:57:14,813 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-11-22 12:57:14,819 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-11-22 12:57:14,819 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-22 12:57:14,820 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:57:14,820 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:57:14,874 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f9833cf6-c379-4875-86d0-6a33665edbb4/bin/utaipan/witness.graphml [2020-11-22 12:57:14,874 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:57:14,875 INFO L168 Benchmark]: Toolchain (without parser) took 5213.33 ms. Allocated memory was 96.5 MB in the beginning and 130.0 MB in the end (delta: 33.6 MB). Free memory was 75.2 MB in the beginning and 54.7 MB in the end (delta: 20.4 MB). Peak memory consumption was 54.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:14,876 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 79.7 MB. Free memory is still 55.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:57:14,876 INFO L168 Benchmark]: CACSL2BoogieTranslator took 643.33 ms. Allocated memory is still 96.5 MB. Free memory was 75.2 MB in the beginning and 44.9 MB in the end (delta: 30.3 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:14,877 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.00 ms. Allocated memory is still 96.5 MB. Free memory was 44.9 MB in the beginning and 42.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:14,877 INFO L168 Benchmark]: Boogie Preprocessor took 56.07 ms. Allocated memory is still 96.5 MB. Free memory was 42.9 MB in the beginning and 41.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:57:14,878 INFO L168 Benchmark]: RCFGBuilder took 632.85 ms. Allocated memory is still 96.5 MB. Free memory was 41.5 MB in the beginning and 59.1 MB in the end (delta: -17.6 MB). Peak memory consumption was 10.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:14,878 INFO L168 Benchmark]: TraceAbstraction took 3731.91 ms. Allocated memory was 96.5 MB in the beginning and 130.0 MB in the end (delta: 33.6 MB). Free memory was 59.1 MB in the beginning and 56.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:14,879 INFO L168 Benchmark]: Witness Printer took 72.67 ms. Allocated memory is still 130.0 MB. Free memory was 56.9 MB in the beginning and 54.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:14,882 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 79.7 MB. Free memory is still 55.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 643.33 ms. Allocated memory is still 96.5 MB. Free memory was 75.2 MB in the beginning and 44.9 MB in the end (delta: 30.3 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 69.00 ms. Allocated memory is still 96.5 MB. Free memory was 44.9 MB in the beginning and 42.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.07 ms. Allocated memory is still 96.5 MB. Free memory was 42.9 MB in the beginning and 41.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 632.85 ms. Allocated memory is still 96.5 MB. Free memory was 41.5 MB in the beginning and 59.1 MB in the end (delta: -17.6 MB). Peak memory consumption was 10.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3731.91 ms. Allocated memory was 96.5 MB in the beginning and 130.0 MB in the end (delta: 33.6 MB). Free memory was 59.1 MB in the beginning and 56.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. * Witness Printer took 72.67 ms. Allocated memory is still 130.0 MB. Free memory was 56.9 MB in the beginning and 54.7 MB in the end (delta: 2.2 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 543 VarBasedMoverChecksPositive, 24 VarBasedMoverChecksNegative, 2 SemBasedMoverChecksPositive, 22 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.3s, 43 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.5s, 69 PlacesBefore, 23 PlacesAfterwards, 65 TransitionsBefore, 17 TransitionsAfterwards, 792 CoEnabledTransitionPairs, 7 FixpointIterations, 17 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 15 ConcurrentYvCompositions, 2 ChoiceCompositions, 66 TotalNumberOfCompositions, 1892 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 3 procedures, 63 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.6s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.5s, HoareTripleCheckerStatistics: 51 SDtfs, 76 SDslu, 69 SDs, 0 SdLazy, 65 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 1063 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...