./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/23_lu-fig2.fixed.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/23_lu-fig2.fixed.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/bin/utaipan-EQgc7hIp5V --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 1e7e50acdaac6c5347f0e6861619a1b564ff01a6e5e780f6d69a20f7f739312d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:29:04,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:29:04,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:29:04,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:29:04,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:29:04,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:29:04,275 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:29:04,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:29:04,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:29:04,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:29:04,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:29:04,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:29:04,288 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:29:04,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:29:04,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:29:04,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:29:04,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:29:04,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:29:04,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:29:04,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:29:04,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:29:04,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:29:04,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:29:04,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:29:04,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:29:04,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:29:04,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:29:04,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:29:04,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:29:04,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:29:04,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:29:04,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:29:04,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:29:04,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:29:04,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:29:04,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:29:04,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:29:04,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:29:04,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:29:04,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:29:04,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:29:04,342 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:29:04,380 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:29:04,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:29:04,381 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:29:04,381 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:29:04,388 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:29:04,396 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:29:04,397 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:29:04,397 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:29:04,397 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:29:04,397 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:29:04,398 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:29:04,398 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:29:04,398 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:29:04,399 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:29:04,399 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:29:04,399 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:29:04,399 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:29:04,400 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:29:04,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:29:04,401 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:29:04,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:29:04,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:29:04,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:29:04,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:29:04,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:29:04,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:29:04,403 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:29:04,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:29:04,403 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:29:04,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:29:04,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:29:04,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:29:04,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:29:04,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:29:04,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:29:04,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:29:04,405 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:29:04,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:29:04,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:29:04,406 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:29:04,406 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:29:04,407 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_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e7e50acdaac6c5347f0e6861619a1b564ff01a6e5e780f6d69a20f7f739312d [2021-11-23 03:29:04,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:29:04,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:29:04,788 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:29:04,790 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:29:04,791 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:29:04,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/pthread-ext/23_lu-fig2.fixed.i [2021-11-23 03:29:04,915 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/bin/utaipan-EQgc7hIp5V/data/ce7245398/9d8c5af4581e4413aa199f379878d88d/FLAGb70e7500e [2021-11-23 03:29:05,642 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:29:05,643 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/sv-benchmarks/c/pthread-ext/23_lu-fig2.fixed.i [2021-11-23 03:29:05,665 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/bin/utaipan-EQgc7hIp5V/data/ce7245398/9d8c5af4581e4413aa199f379878d88d/FLAGb70e7500e [2021-11-23 03:29:05,946 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/bin/utaipan-EQgc7hIp5V/data/ce7245398/9d8c5af4581e4413aa199f379878d88d [2021-11-23 03:29:05,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:29:05,962 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:29:05,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:29:05,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:29:05,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:29:05,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:29:05" (1/1) ... [2021-11-23 03:29:05,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7269cfa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:05, skipping insertion in model container [2021-11-23 03:29:05,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:29:05" (1/1) ... [2021-11-23 03:29:05,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:29:06,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:29:06,605 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/sv-benchmarks/c/pthread-ext/23_lu-fig2.fixed.i[30382,30395] [2021-11-23 03:29:06,613 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/sv-benchmarks/c/pthread-ext/23_lu-fig2.fixed.i[30752,30765] [2021-11-23 03:29:06,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:29:06,633 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:29:06,682 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/sv-benchmarks/c/pthread-ext/23_lu-fig2.fixed.i[30382,30395] [2021-11-23 03:29:06,684 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/sv-benchmarks/c/pthread-ext/23_lu-fig2.fixed.i[30752,30765] [2021-11-23 03:29:06,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:29:06,743 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:29:06,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:06 WrapperNode [2021-11-23 03:29:06,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:29:06,745 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:29:06,746 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:29:06,746 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:29:06,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:06" (1/1) ... [2021-11-23 03:29:06,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:06" (1/1) ... [2021-11-23 03:29:06,808 INFO L137 Inliner]: procedures = 172, calls = 20, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 88 [2021-11-23 03:29:06,809 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:29:06,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:29:06,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:29:06,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:29:06,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:06" (1/1) ... [2021-11-23 03:29:06,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:06" (1/1) ... [2021-11-23 03:29:06,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:06" (1/1) ... [2021-11-23 03:29:06,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:06" (1/1) ... [2021-11-23 03:29:06,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:06" (1/1) ... [2021-11-23 03:29:06,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:06" (1/1) ... [2021-11-23 03:29:06,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:06" (1/1) ... [2021-11-23 03:29:06,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:29:06,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:29:06,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:29:06,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:29:06,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:06" (1/1) ... [2021-11-23 03:29:06,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:29:06,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:29:06,897 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:29:06,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:29:06,957 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2021-11-23 03:29:06,957 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2021-11-23 03:29:06,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:29:06,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:29:06,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:29:06,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:29:06,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:29:06,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:29:06,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:29:06,961 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-23 03:29:07,141 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:29:07,143 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:29:07,424 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:29:07,514 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:29:07,515 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 03:29:07,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:29:07 BoogieIcfgContainer [2021-11-23 03:29:07,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:29:07,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:29:07,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:29:07,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:29:07,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:29:05" (1/3) ... [2021-11-23 03:29:07,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7d48f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:29:07, skipping insertion in model container [2021-11-23 03:29:07,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:06" (2/3) ... [2021-11-23 03:29:07,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7d48f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:29:07, skipping insertion in model container [2021-11-23 03:29:07,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:29:07" (3/3) ... [2021-11-23 03:29:07,530 INFO L111 eAbstractionObserver]: Analyzing ICFG 23_lu-fig2.fixed.i [2021-11-23 03:29:07,537 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-23 03:29:07,537 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:29:07,538 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 03:29:07,538 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-23 03:29:07,569 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,570 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,570 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,570 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,571 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,571 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,571 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,572 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,572 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~PR_CreateThread__RES~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,573 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~PR_CreateThread__RES~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,573 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,573 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,574 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,574 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,574 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~PR_CreateThread__RES~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,575 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_#in~PR_CreateThread__RES#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,575 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_~PR_CreateThread__RES#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,575 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~PR_CreateThread__RES~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,576 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_#in~PR_CreateThread__RES#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,576 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_~PR_CreateThread__RES#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,576 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~PR_CreateThread__RES~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,577 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_#in~PR_CreateThread__RES#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,577 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_~PR_CreateThread__RES#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,577 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~PR_CreateThread__RES~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,578 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_#in~PR_CreateThread__RES#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,578 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_~PR_CreateThread__RES#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,578 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,579 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,579 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,579 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,580 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,580 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,580 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,581 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,585 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,585 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,586 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,586 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,586 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_~PR_CreateThread__RES~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,587 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_~PR_CreateThread__RES#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,587 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,587 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,588 WARN L322 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_#in~PR_CreateThread__RES#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:29:07,589 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-23 03:29:07,672 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:29:07,682 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:29:07,682 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-23 03:29:07,699 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-23 03:29:07,719 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 58 places, 56 transitions, 117 flow [2021-11-23 03:29:07,723 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 58 places, 56 transitions, 117 flow [2021-11-23 03:29:07,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 58 places, 56 transitions, 117 flow [2021-11-23 03:29:07,769 INFO L129 PetriNetUnfolder]: 2/55 cut-off events. [2021-11-23 03:29:07,770 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-23 03:29:07,773 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 55 events. 2/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 34. Up to 2 conditions per place. [2021-11-23 03:29:07,776 INFO L116 LiptonReduction]: Number of co-enabled transitions 450 [2021-11-23 03:29:10,504 INFO L131 LiptonReduction]: Checked pairs total: 963 [2021-11-23 03:29:10,505 INFO L133 LiptonReduction]: Total number of compositions: 45 [2021-11-23 03:29:10,518 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 17 places, 14 transitions, 33 flow [2021-11-23 03:29:10,534 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 36 states, 31 states have (on average 2.064516129032258) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:29:10,537 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 31 states have (on average 2.064516129032258) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:29:10,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 03:29:10,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:29:10,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 03:29:10,546 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION (and 1 more)] === [2021-11-23 03:29:10,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:29:10,553 INFO L85 PathProgramCache]: Analyzing trace with hash 11561944, now seen corresponding path program 1 times [2021-11-23 03:29:10,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:29:10,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526602495] [2021-11-23 03:29:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:29:10,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:29:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:29:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:29:10,830 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:29:10,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526602495] [2021-11-23 03:29:10,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526602495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:29:10,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:29:10,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 03:29:10,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829007092] [2021-11-23 03:29:10,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:29:10,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:29:10,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:29:10,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:29:10,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:29:10,873 INFO L87 Difference]: Start difference. First operand has 36 states, 31 states have (on average 2.064516129032258) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:29:10,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:29:10,929 INFO L93 Difference]: Finished difference Result 27 states and 47 transitions. [2021-11-23 03:29:10,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:29:10,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-23 03:29:10,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:29:10,942 INFO L225 Difference]: With dead ends: 27 [2021-11-23 03:29:10,942 INFO L226 Difference]: Without dead ends: 22 [2021-11-23 03:29:10,944 INFO L932 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 [2021-11-23 03:29:10,948 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:29:10,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 3 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:29:10,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-23 03:29:10,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-23 03:29:10,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:29:10,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 38 transitions. [2021-11-23 03:29:10,992 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 38 transitions. Word has length 4 [2021-11-23 03:29:10,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:29:10,993 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 38 transitions. [2021-11-23 03:29:10,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:29:10,994 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 38 transitions. [2021-11-23 03:29:10,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 03:29:10,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:29:10,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 03:29:10,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:29:10,996 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION (and 1 more)] === [2021-11-23 03:29:10,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:29:10,997 INFO L85 PathProgramCache]: Analyzing trace with hash 358429712, now seen corresponding path program 1 times [2021-11-23 03:29:10,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:29:10,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971820224] [2021-11-23 03:29:10,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:29:10,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:29:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:29:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:29:11,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:29:11,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971820224] [2021-11-23 03:29:11,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971820224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:29:11,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:29:11,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:29:11,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019019311] [2021-11-23 03:29:11,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:29:11,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:29:11,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:29:11,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:29:11,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:29:11,080 INFO L87 Difference]: Start difference. First operand 22 states and 38 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:29:11,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:29:11,111 INFO L93 Difference]: Finished difference Result 21 states and 35 transitions. [2021-11-23 03:29:11,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:29:11,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-23 03:29:11,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:29:11,113 INFO L225 Difference]: With dead ends: 21 [2021-11-23 03:29:11,113 INFO L226 Difference]: Without dead ends: 18 [2021-11-23 03:29:11,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:29:11,115 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:29:11,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:29:11,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-23 03:29:11,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-23 03:29:11,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:29:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 27 transitions. [2021-11-23 03:29:11,122 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 27 transitions. Word has length 5 [2021-11-23 03:29:11,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:29:11,123 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 27 transitions. [2021-11-23 03:29:11,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:29:11,124 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 27 transitions. [2021-11-23 03:29:11,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:29:11,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:29:11,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:29:11,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:29:11,125 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION (and 1 more)] === [2021-11-23 03:29:11,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:29:11,126 INFO L85 PathProgramCache]: Analyzing trace with hash 844444633, now seen corresponding path program 1 times [2021-11-23 03:29:11,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:29:11,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306718997] [2021-11-23 03:29:11,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:29:11,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:29:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:29:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:29:11,260 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:29:11,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306718997] [2021-11-23 03:29:11,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306718997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:29:11,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:29:11,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:29:11,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277283083] [2021-11-23 03:29:11,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:29:11,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:29:11,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:29:11,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:29:11,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:29:11,264 INFO L87 Difference]: Start difference. First operand 18 states and 27 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:29:11,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:29:11,297 INFO L93 Difference]: Finished difference Result 14 states and 19 transitions. [2021-11-23 03:29:11,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:29:11,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 03:29:11,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:29:11,299 INFO L225 Difference]: With dead ends: 14 [2021-11-23 03:29:11,299 INFO L226 Difference]: Without dead ends: 14 [2021-11-23 03:29:11,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:29:11,302 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:29:11,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:29:11,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-23 03:29:11,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-23 03:29:11,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:29:11,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2021-11-23 03:29:11,308 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 7 [2021-11-23 03:29:11,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:29:11,309 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2021-11-23 03:29:11,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:29:11,310 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2021-11-23 03:29:11,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:29:11,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:29:11,311 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:29:11,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:29:11,312 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION (and 1 more)] === [2021-11-23 03:29:11,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:29:11,313 INFO L85 PathProgramCache]: Analyzing trace with hash -281190851, now seen corresponding path program 1 times [2021-11-23 03:29:11,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:29:11,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940967281] [2021-11-23 03:29:11,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:29:11,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:29:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:29:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:29:11,409 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:29:11,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940967281] [2021-11-23 03:29:11,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940967281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:29:11,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:29:11,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:29:11,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682474015] [2021-11-23 03:29:11,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:29:11,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:29:11,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:29:11,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:29:11,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:29:11,413 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:29:11,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:29:11,471 INFO L93 Difference]: Finished difference Result 13 states and 18 transitions. [2021-11-23 03:29:11,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:29:11,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 03:29:11,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:29:11,472 INFO L225 Difference]: With dead ends: 13 [2021-11-23 03:29:11,472 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 03:29:11,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:29:11,475 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:29:11,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:29:11,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 03:29:11,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 03:29:11,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:29:11,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 03:29:11,478 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2021-11-23 03:29:11,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:29:11,478 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 03:29:11,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:29:11,479 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 03:29:11,479 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 03:29:11,483 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2021-11-23 03:29:11,483 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2021-11-23 03:29:11,484 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 4 remaining) [2021-11-23 03:29:11,484 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2021-11-23 03:29:11,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:29:11,488 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-23 03:29:11,494 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-11-23 03:29:11,494 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:29:11,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:29:11 BasicIcfg [2021-11-23 03:29:11,499 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:29:11,500 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:29:11,500 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:29:11,500 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:29:11,501 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:29:07" (3/4) ... [2021-11-23 03:29:11,504 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 03:29:11,515 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thr1 [2021-11-23 03:29:11,528 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 40 nodes and edges [2021-11-23 03:29:11,528 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-11-23 03:29:11,529 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-23 03:29:11,530 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 03:29:11,574 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:29:11,575 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:29:11,576 INFO L158 Benchmark]: Toolchain (without parser) took 5613.69ms. Allocated memory was 98.6MB in the beginning and 130.0MB in the end (delta: 31.5MB). Free memory was 62.6MB in the beginning and 98.6MB in the end (delta: -36.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:29:11,576 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 98.6MB. Free memory was 71.1MB in the beginning and 71.0MB in the end (delta: 30.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:29:11,577 INFO L158 Benchmark]: CACSL2BoogieTranslator took 779.62ms. Allocated memory is still 98.6MB. Free memory was 62.6MB in the beginning and 65.4MB in the end (delta: -2.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 03:29:11,578 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.81ms. Allocated memory is still 98.6MB. Free memory was 65.4MB in the beginning and 63.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:29:11,578 INFO L158 Benchmark]: Boogie Preprocessor took 38.38ms. Allocated memory is still 98.6MB. Free memory was 63.4MB in the beginning and 61.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:29:11,579 INFO L158 Benchmark]: RCFGBuilder took 669.11ms. Allocated memory is still 98.6MB. Free memory was 61.9MB in the beginning and 46.3MB in the end (delta: 15.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-23 03:29:11,580 INFO L158 Benchmark]: TraceAbstraction took 3978.04ms. Allocated memory was 98.6MB in the beginning and 130.0MB in the end (delta: 31.5MB). Free memory was 45.9MB in the beginning and 101.7MB in the end (delta: -55.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:29:11,580 INFO L158 Benchmark]: Witness Printer took 75.47ms. Allocated memory is still 130.0MB. Free memory was 101.7MB in the beginning and 98.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:29:11,583 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 98.6MB. Free memory was 71.1MB in the beginning and 71.0MB in the end (delta: 30.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 779.62ms. Allocated memory is still 98.6MB. Free memory was 62.6MB in the beginning and 65.4MB in the end (delta: -2.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.81ms. Allocated memory is still 98.6MB. Free memory was 65.4MB in the beginning and 63.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.38ms. Allocated memory is still 98.6MB. Free memory was 63.4MB in the beginning and 61.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 669.11ms. Allocated memory is still 98.6MB. Free memory was 61.9MB in the beginning and 46.3MB in the end (delta: 15.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 3978.04ms. Allocated memory was 98.6MB in the beginning and 130.0MB in the end (delta: 31.5MB). Free memory was 45.9MB in the beginning and 101.7MB in the end (delta: -55.8MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 75.47ms. Allocated memory is still 130.0MB. Free memory was 101.7MB in the beginning and 98.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 58 PlacesBefore, 17 PlacesAfterwards, 56 TransitionsBefore, 14 TransitionsAfterwards, 450 CoEnabledTransitionPairs, 5 FixpointIterations, 19 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 45 TotalNumberOfCompositions, 963 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 636, positive: 557, positive conditional: 0, positive unconditional: 557, negative: 79, negative conditional: 0, negative unconditional: 79, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 336, positive: 311, positive conditional: 0, positive unconditional: 311, negative: 25, negative conditional: 0, negative unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 336, positive: 297, positive conditional: 0, positive unconditional: 297, negative: 39, negative conditional: 0, negative unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 39, positive: 14, positive conditional: 0, positive unconditional: 14, negative: 25, negative conditional: 0, negative unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 172, positive: 54, positive conditional: 0, positive unconditional: 54, negative: 118, negative conditional: 0, negative unconditional: 118, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 636, positive: 246, positive conditional: 0, positive unconditional: 246, negative: 54, negative conditional: 0, negative unconditional: 54, unknown: 336, unknown conditional: 0, unknown unconditional: 336] , Statistics on independence cache: Total cache size (in pairs): 35, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 707]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 721]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 66 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 3.8s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 18 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 18 mSDsluCounter, 10 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 20 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 67 IncrementalHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 7 mSDtfsCounter, 67 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, InterpolantAutomatonStates: 14, 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, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 82 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-23 03:29:11,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988c6d34-b6ef-4442-87f6-b56217e7410d/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE