./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe022_tso.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f780f36-858a-4f1c-87ab-c52d2f4d92f0/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f780f36-858a-4f1c-87ab-c52d2f4d92f0/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f780f36-858a-4f1c-87ab-c52d2f4d92f0/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f780f36-858a-4f1c-87ab-c52d2f4d92f0/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe022_tso.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f780f36-858a-4f1c-87ab-c52d2f4d92f0/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f780f36-858a-4f1c-87ab-c52d2f4d92f0/bin/utaipan-tZwUujhuQw --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 cfc87f4ca115dcc389a4b05cbc106fd8bac1a9e17a58d50108d65580024dc2f5 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-20 05:15:28,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 05:15:28,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 05:15:28,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 05:15:28,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 05:15:28,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 05:15:28,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 05:15:28,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 05:15:28,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 05:15:28,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 05:15:28,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 05:15:28,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 05:15:28,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 05:15:28,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 05:15:28,782 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 05:15:28,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 05:15:28,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 05:15:28,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 05:15:28,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 05:15:28,791 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 05:15:28,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 05:15:28,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 05:15:28,796 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 05:15:28,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 05:15:28,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 05:15:28,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 05:15:28,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 05:15:28,803 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 05:15:28,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 05:15:28,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 05:15:28,806 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 05:15:28,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 05:15:28,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 05:15:28,809 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 05:15:28,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 05:15:28,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 05:15:28,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 05:15:28,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 05:15:28,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 05:15:28,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 05:15:28,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 05:15:28,819 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f780f36-858a-4f1c-87ab-c52d2f4d92f0/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-20 05:15:28,862 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 05:15:28,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 05:15:28,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 05:15:28,864 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 05:15:28,864 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 05:15:28,864 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 05:15:28,865 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 05:15:28,865 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 05:15:28,871 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 05:15:28,872 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 05:15:28,873 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 05:15:28,873 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 05:15:28,874 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 05:15:28,874 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 05:15:28,874 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 05:15:28,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 05:15:28,875 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 05:15:28,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 05:15:28,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 05:15:28,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 05:15:28,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 05:15:28,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 05:15:28,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 05:15:28,877 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 05:15:28,877 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 05:15:28,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 05:15:28,877 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 05:15:28,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 05:15:28,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 05:15:28,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 05:15:28,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:15:28,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 05:15:28,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 05:15:28,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 05:15:28,881 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 05:15:28,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 05:15:28,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 05:15:28,882 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 05:15:28,882 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 05:15:28,882 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_6f780f36-858a-4f1c-87ab-c52d2f4d92f0/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f780f36-858a-4f1c-87ab-c52d2f4d92f0/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cfc87f4ca115dcc389a4b05cbc106fd8bac1a9e17a58d50108d65580024dc2f5 [2021-10-20 05:15:29,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 05:15:29,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 05:15:29,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 05:15:29,192 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 05:15:29,193 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 05:15:29,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f780f36-858a-4f1c-87ab-c52d2f4d92f0/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/pthread-wmm/safe022_tso.i [2021-10-20 05:15:29,272 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f780f36-858a-4f1c-87ab-c52d2f4d92f0/bin/utaipan-tZwUujhuQw/data/359b99fe0/e94fb4fe6e2f4666a7bb5a47eec29776/FLAGb93aab67b [2021-10-20 05:15:29,971 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 05:15:29,972 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f780f36-858a-4f1c-87ab-c52d2f4d92f0/sv-benchmarks/c/pthread-wmm/safe022_tso.i [2021-10-20 05:15:29,986 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f780f36-858a-4f1c-87ab-c52d2f4d92f0/bin/utaipan-tZwUujhuQw/data/359b99fe0/e94fb4fe6e2f4666a7bb5a47eec29776/FLAGb93aab67b [2021-10-20 05:15:30,202 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f780f36-858a-4f1c-87ab-c52d2f4d92f0/bin/utaipan-tZwUujhuQw/data/359b99fe0/e94fb4fe6e2f4666a7bb5a47eec29776 [2021-10-20 05:15:30,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 05:15:30,205 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 05:15:30,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 05:15:30,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 05:15:30,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 05:15:30,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:15:30" (1/1) ... [2021-10-20 05:15:30,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ee2464c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:30, skipping insertion in model container [2021-10-20 05:15:30,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:15:30" (1/1) ... [2021-10-20 05:15:30,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 05:15:30,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 05:15:30,486 WARN L228 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_6f780f36-858a-4f1c-87ab-c52d2f4d92f0/sv-benchmarks/c/pthread-wmm/safe022_tso.i[945,958] [2021-10-20 05:15:30,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:15:30,665 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 05:15:30,680 WARN L228 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_6f780f36-858a-4f1c-87ab-c52d2f4d92f0/sv-benchmarks/c/pthread-wmm/safe022_tso.i[945,958] [2021-10-20 05:15:30,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:15:30,792 INFO L208 MainTranslator]: Completed translation [2021-10-20 05:15:30,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:30 WrapperNode [2021-10-20 05:15:30,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 05:15:30,794 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 05:15:30,794 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 05:15:30,794 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 05:15:30,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:30" (1/1) ... [2021-10-20 05:15:30,842 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:30" (1/1) ... [2021-10-20 05:15:30,869 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 05:15:30,870 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 05:15:30,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 05:15:30,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 05:15:30,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:30" (1/1) ... [2021-10-20 05:15:30,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:30" (1/1) ... [2021-10-20 05:15:30,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:30" (1/1) ... [2021-10-20 05:15:30,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:30" (1/1) ... [2021-10-20 05:15:30,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:30" (1/1) ... [2021-10-20 05:15:30,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:30" (1/1) ... [2021-10-20 05:15:30,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:30" (1/1) ... [2021-10-20 05:15:30,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 05:15:30,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 05:15:30,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 05:15:30,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 05:15:30,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:30" (1/1) ... [2021-10-20 05:15:30,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:15:30,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f780f36-858a-4f1c-87ab-c52d2f4d92f0/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:15:30,955 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f780f36-858a-4f1c-87ab-c52d2f4d92f0/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 05:15:30,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f780f36-858a-4f1c-87ab-c52d2f4d92f0/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 05:15:31,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-20 05:15:31,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-20 05:15:31,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 05:15:31,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-20 05:15:31,014 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-10-20 05:15:31,014 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-10-20 05:15:31,014 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-10-20 05:15:31,014 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-10-20 05:15:31,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-20 05:15:31,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-20 05:15:31,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 05:15:31,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 05:15:31,017 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-20 05:15:31,427 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 05:15:31,428 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-20 05:15:31,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:15:31 BoogieIcfgContainer [2021-10-20 05:15:31,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 05:15:31,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 05:15:31,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 05:15:31,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 05:15:31,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:15:30" (1/3) ... [2021-10-20 05:15:31,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@306e3828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:15:31, skipping insertion in model container [2021-10-20 05:15:31,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:30" (2/3) ... [2021-10-20 05:15:31,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@306e3828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:15:31, skipping insertion in model container [2021-10-20 05:15:31,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:15:31" (3/3) ... [2021-10-20 05:15:31,440 INFO L111 eAbstractionObserver]: Analyzing ICFG safe022_tso.i [2021-10-20 05:15:31,446 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-20 05:15:31,446 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 05:15:31,447 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-20 05:15:31,447 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-20 05:15:31,474 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,474 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,474 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,475 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,475 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,475 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,475 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,476 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,476 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,477 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,477 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,477 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,478 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,478 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,478 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,478 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,479 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,479 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,479 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,479 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,480 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,480 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,480 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,481 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,484 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,485 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,485 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,485 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,490 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,490 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,491 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,491 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:15:31,493 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-10-20 05:15:31,542 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 05:15:31,549 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 [2021-10-20 05:15:31,550 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-20 05:15:31,564 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-20 05:15:31,577 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 67 transitions, 144 flow [2021-10-20 05:15:31,580 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 67 transitions, 144 flow [2021-10-20 05:15:31,582 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 72 places, 67 transitions, 144 flow [2021-10-20 05:15:31,628 INFO L129 PetriNetUnfolder]: 2/65 cut-off events. [2021-10-20 05:15:31,629 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-20 05:15:31,632 INFO L84 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 65 events. 2/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 36 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2021-10-20 05:15:31,634 INFO L116 LiptonReduction]: Number of co-enabled transitions 756 [2021-10-20 05:15:34,363 INFO L131 LiptonReduction]: Checked pairs total: 1496 [2021-10-20 05:15:34,363 INFO L133 LiptonReduction]: Total number of compositions: 62 [2021-10-20 05:15:34,371 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 22 places, 15 transitions, 40 flow [2021-10-20 05:15:34,396 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 58 states, 57 states have (on average 2.1052631578947367) internal successors, (120), 57 states have internal predecessors, (120), 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) [2021-10-20 05:15:34,398 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 57 states have (on average 2.1052631578947367) internal successors, (120), 57 states have internal predecessors, (120), 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) [2021-10-20 05:15:34,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-20 05:15:34,403 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:15:34,404 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-20 05:15:34,404 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-20 05:15:34,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:15:34,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1311866131, now seen corresponding path program 1 times [2021-10-20 05:15:34,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:15:34,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567997011] [2021-10-20 05:15:34,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:15:34,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:15:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:15:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:15:34,714 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:15:34,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567997011] [2021-10-20 05:15:34,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567997011] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:15:34,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:15:34,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-20 05:15:34,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225064913] [2021-10-20 05:15:34,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:15:34,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:15:34,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:15:34,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:15:34,747 INFO L87 Difference]: Start difference. First operand has 58 states, 57 states have (on average 2.1052631578947367) internal successors, (120), 57 states have internal predecessors, (120), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-20 05:15:34,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:15:34,776 INFO L93 Difference]: Finished difference Result 54 states and 109 transitions. [2021-10-20 05:15:34,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:15:34,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-10-20 05:15:34,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:15:34,789 INFO L225 Difference]: With dead ends: 54 [2021-10-20 05:15:34,789 INFO L226 Difference]: Without dead ends: 54 [2021-10-20 05:15:34,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:15:34,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-20 05:15:34,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-20 05:15:34,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 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) [2021-10-20 05:15:34,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 109 transitions. [2021-10-20 05:15:34,846 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 109 transitions. Word has length 6 [2021-10-20 05:15:34,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:15:34,847 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 109 transitions. [2021-10-20 05:15:34,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-20 05:15:34,848 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 109 transitions. [2021-10-20 05:15:34,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-20 05:15:34,849 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:15:34,854 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:15:34,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-20 05:15:34,855 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-20 05:15:34,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:15:34,856 INFO L82 PathProgramCache]: Analyzing trace with hash -2013166160, now seen corresponding path program 1 times [2021-10-20 05:15:34,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:15:34,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471079736] [2021-10-20 05:15:34,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:15:34,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:15:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:15:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:15:35,000 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:15:35,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471079736] [2021-10-20 05:15:35,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471079736] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:15:35,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:15:35,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:15:35,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319328952] [2021-10-20 05:15:35,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:15:35,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:15:35,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:15:35,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:15:35,006 INFO L87 Difference]: Start difference. First operand 54 states and 109 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2021-10-20 05:15:35,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:15:35,035 INFO L93 Difference]: Finished difference Result 60 states and 113 transitions. [2021-10-20 05:15:35,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:15:35,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 [2021-10-20 05:15:35,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:15:35,037 INFO L225 Difference]: With dead ends: 60 [2021-10-20 05:15:35,037 INFO L226 Difference]: Without dead ends: 36 [2021-10-20 05:15:35,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 05:15:35,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-20 05:15:35,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-20 05:15:35,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 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) [2021-10-20 05:15:35,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 63 transitions. [2021-10-20 05:15:35,053 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 63 transitions. Word has length 7 [2021-10-20 05:15:35,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:15:35,054 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 63 transitions. [2021-10-20 05:15:35,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2021-10-20 05:15:35,054 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 63 transitions. [2021-10-20 05:15:35,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-20 05:15:35,055 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:15:35,055 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:15:35,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-20 05:15:35,056 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-20 05:15:35,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:15:35,068 INFO L82 PathProgramCache]: Analyzing trace with hash 581783128, now seen corresponding path program 1 times [2021-10-20 05:15:35,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:15:35,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29340602] [2021-10-20 05:15:35,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:15:35,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:15:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:15:35,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:15:35,174 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:15:35,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29340602] [2021-10-20 05:15:35,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29340602] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:15:35,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:15:35,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:15:35,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440794475] [2021-10-20 05:15:35,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:15:35,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:15:35,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:15:35,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:15:35,180 INFO L87 Difference]: Start difference. First operand 36 states and 63 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) [2021-10-20 05:15:35,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:15:35,211 INFO L93 Difference]: Finished difference Result 39 states and 61 transitions. [2021-10-20 05:15:35,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-20 05:15:35,211 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 [2021-10-20 05:15:35,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:15:35,212 INFO L225 Difference]: With dead ends: 39 [2021-10-20 05:15:35,214 INFO L226 Difference]: Without dead ends: 29 [2021-10-20 05:15:35,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 05:15:35,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-20 05:15:35,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-20 05:15:35,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 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) [2021-10-20 05:15:35,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 44 transitions. [2021-10-20 05:15:35,220 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 44 transitions. Word has length 9 [2021-10-20 05:15:35,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:15:35,220 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 44 transitions. [2021-10-20 05:15:35,221 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) [2021-10-20 05:15:35,221 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 44 transitions. [2021-10-20 05:15:35,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-20 05:15:35,222 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:15:35,222 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:15:35,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-20 05:15:35,222 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-20 05:15:35,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:15:35,223 INFO L82 PathProgramCache]: Analyzing trace with hash 855409085, now seen corresponding path program 1 times [2021-10-20 05:15:35,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:15:35,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496169441] [2021-10-20 05:15:35,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:15:35,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:15:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:15:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:15:35,368 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:15:35,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496169441] [2021-10-20 05:15:35,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496169441] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:15:35,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:15:35,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:15:35,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817624303] [2021-10-20 05:15:35,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-20 05:15:35,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:15:35,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-20 05:15:35,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-20 05:15:35,372 INFO L87 Difference]: Start difference. First operand 29 states and 44 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-20 05:15:35,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:15:35,401 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2021-10-20 05:15:35,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-20 05:15:35,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-10-20 05:15:35,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:15:35,402 INFO L225 Difference]: With dead ends: 27 [2021-10-20 05:15:35,403 INFO L226 Difference]: Without dead ends: 22 [2021-10-20 05:15:35,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-20 05:15:35,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-20 05:15:35,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-20 05:15:35,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 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) [2021-10-20 05:15:35,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2021-10-20 05:15:35,407 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 10 [2021-10-20 05:15:35,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:15:35,407 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2021-10-20 05:15:35,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-20 05:15:35,408 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2021-10-20 05:15:35,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-20 05:15:35,408 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:15:35,409 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:15:35,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-20 05:15:35,413 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-20 05:15:35,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:15:35,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1671792748, now seen corresponding path program 1 times [2021-10-20 05:15:35,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:15:35,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902487178] [2021-10-20 05:15:35,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:15:35,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:15:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:15:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:15:35,482 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:15:35,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902487178] [2021-10-20 05:15:35,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902487178] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:15:35,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:15:35,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:15:35,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670528571] [2021-10-20 05:15:35,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:15:35,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:15:35,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:15:35,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:15:35,485 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-10-20 05:15:35,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:15:35,498 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2021-10-20 05:15:35,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-20 05:15:35,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2021-10-20 05:15:35,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:15:35,499 INFO L225 Difference]: With dead ends: 21 [2021-10-20 05:15:35,499 INFO L226 Difference]: Without dead ends: 0 [2021-10-20 05:15:35,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 05:15:35,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-20 05:15:35,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-20 05:15:35,500 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) [2021-10-20 05:15:35,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-20 05:15:35,500 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-10-20 05:15:35,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:15:35,501 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-20 05:15:35,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-10-20 05:15:35,501 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-20 05:15:35,501 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-20 05:15:35,504 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:15:35,505 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-20 05:15:35,505 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-20 05:15:35,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-20 05:15:35,509 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-20 05:15:35,509 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 05:15:35,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 05:15:35 BasicIcfg [2021-10-20 05:15:35,511 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 05:15:35,512 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 05:15:35,512 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 05:15:35,512 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 05:15:35,513 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:15:31" (3/4) ... [2021-10-20 05:15:35,516 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-20 05:15:35,523 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2021-10-20 05:15:35,523 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2021-10-20 05:15:35,528 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-20 05:15:35,528 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-20 05:15:35,528 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-20 05:15:35,529 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-20 05:15:35,566 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f780f36-858a-4f1c-87ab-c52d2f4d92f0/bin/utaipan-tZwUujhuQw/witness.graphml [2021-10-20 05:15:35,566 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 05:15:35,567 INFO L168 Benchmark]: Toolchain (without parser) took 5361.09 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 94.6 MB in the beginning and 115.9 MB in the end (delta: -21.4 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2021-10-20 05:15:35,568 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 86.0 MB. Free memory was 56.7 MB in the beginning and 56.7 MB in the end (delta: 30.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:15:35,569 INFO L168 Benchmark]: CACSL2BoogieTranslator took 586.17 ms. Allocated memory is still 130.0 MB. Free memory was 94.4 MB in the beginning and 97.1 MB in the end (delta: -2.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-20 05:15:35,569 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.28 ms. Allocated memory is still 130.0 MB. Free memory was 97.1 MB in the beginning and 95.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:15:35,570 INFO L168 Benchmark]: Boogie Preprocessor took 54.60 ms. Allocated memory is still 130.0 MB. Free memory was 95.2 MB in the beginning and 93.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:15:35,570 INFO L168 Benchmark]: RCFGBuilder took 505.37 ms. Allocated memory is still 130.0 MB. Free memory was 93.9 MB in the beginning and 82.6 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-20 05:15:35,571 INFO L168 Benchmark]: TraceAbstraction took 4078.96 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 82.0 MB in the beginning and 119.1 MB in the end (delta: -37.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:15:35,571 INFO L168 Benchmark]: Witness Printer took 53.97 ms. Allocated memory is still 157.3 MB. Free memory was 119.1 MB in the beginning and 115.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:15:35,574 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 86.0 MB. Free memory was 56.7 MB in the beginning and 56.7 MB in the end (delta: 30.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 586.17 ms. Allocated memory is still 130.0 MB. Free memory was 94.4 MB in the beginning and 97.1 MB in the end (delta: -2.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 75.28 ms. Allocated memory is still 130.0 MB. Free memory was 97.1 MB in the beginning and 95.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.60 ms. Allocated memory is still 130.0 MB. Free memory was 95.2 MB in the beginning and 93.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 505.37 ms. Allocated memory is still 130.0 MB. Free memory was 93.9 MB in the beginning and 82.6 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4078.96 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 82.0 MB in the beginning and 119.1 MB in the end (delta: -37.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 53.97 ms. Allocated memory is still 157.3 MB. Free memory was 119.1 MB in the beginning and 115.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2783.3ms, 72 PlacesBefore, 22 PlacesAfterwards, 67 TransitionsBefore, 15 TransitionsAfterwards, 756 CoEnabledTransitionPairs, 6 FixpointIterations, 19 TrivialSequentialCompositions, 36 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 2 ChoiceCompositions, 62 TotalNumberOfCompositions, 1496 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 895, positive: 822, positive conditional: 0, positive unconditional: 822, negative: 73, negative conditional: 0, negative unconditional: 73, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 540, positive: 511, positive conditional: 0, positive unconditional: 511, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 540, positive: 508, positive conditional: 0, positive unconditional: 508, negative: 32, negative conditional: 0, negative unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 32, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 88, positive: 21, positive conditional: 0, positive unconditional: 21, negative: 67, negative conditional: 0, negative unconditional: 67, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 895, positive: 311, positive conditional: 0, positive unconditional: 311, negative: 44, negative conditional: 0, negative unconditional: 44, unknown: 540, unknown conditional: 0, unknown unconditional: 540] , Statistics on independence cache: Total cache size (in pairs): 36, Positive cache size: 28, Positive conditional cache size: 0, Positive unconditional cache size: 28, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: 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 5 procedures, 82 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 3968.1ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 11.3ms, AutomataDifference: 181.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2845.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 59 SDtfs, 53 SDslu, 53 SDs, 0 SdLazy, 44 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 44.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 62.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=0, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 64.0ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 17.1ms SsaConstructionTime, 207.5ms SatisfiabilityAnalysisTime, 418.0ms InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 39 ConstructedInterpolants, 0 QuantifiedInterpolants, 179 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-20 05:15:35,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f780f36-858a-4f1c-87ab-c52d2f4d92f0/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...