./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe019_power.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede29521-d48f-47c1-9df9-5ccc98747e99/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede29521-d48f-47c1-9df9-5ccc98747e99/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede29521-d48f-47c1-9df9-5ccc98747e99/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede29521-d48f-47c1-9df9-5ccc98747e99/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe019_power.oepc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede29521-d48f-47c1-9df9-5ccc98747e99/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede29521-d48f-47c1-9df9-5ccc98747e99/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e9fa0a1b11704376245a2fedbc5c4fb7e02255cba008bc8067c3e06529a17976 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:00:37,707 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:00:37,833 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede29521-d48f-47c1-9df9-5ccc98747e99/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 08:00:37,841 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:00:37,842 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:00:37,884 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:00:37,885 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:00:37,886 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:00:37,887 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:00:37,892 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:00:37,894 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:00:37,894 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:00:37,895 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:00:37,897 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:00:37,897 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:00:37,897 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:00:37,898 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:00:37,898 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:00:37,899 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 08:00:37,899 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 08:00:37,900 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 08:00:37,900 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:00:37,901 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 08:00:37,901 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 08:00:37,901 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:00:37,902 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:00:37,903 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:00:37,903 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:00:37,904 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:00:37,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:37,906 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:00:37,906 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:00:37,923 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:00:37,925 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:00:37,925 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:00:37,925 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:00:37,926 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:00:37,926 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:00:37,926 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_ede29521-d48f-47c1-9df9-5ccc98747e99/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede29521-d48f-47c1-9df9-5ccc98747e99/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e9fa0a1b11704376245a2fedbc5c4fb7e02255cba008bc8067c3e06529a17976 [2023-11-19 08:00:38,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:00:38,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:00:38,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:00:38,236 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:00:38,236 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:00:38,238 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede29521-d48f-47c1-9df9-5ccc98747e99/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-wmm/safe019_power.oepc.i [2023-11-19 08:00:41,528 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:00:41,839 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:00:41,840 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede29521-d48f-47c1-9df9-5ccc98747e99/sv-benchmarks/c/pthread-wmm/safe019_power.oepc.i [2023-11-19 08:00:41,862 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede29521-d48f-47c1-9df9-5ccc98747e99/bin/uautomizer-verify-uCwYo4JHxu/data/d63e40afd/db24369dfc7447d7ab3ccb28101edcae/FLAG7e2446ca4 [2023-11-19 08:00:41,877 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede29521-d48f-47c1-9df9-5ccc98747e99/bin/uautomizer-verify-uCwYo4JHxu/data/d63e40afd/db24369dfc7447d7ab3ccb28101edcae [2023-11-19 08:00:41,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:00:41,888 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:00:41,889 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:41,890 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:00:41,900 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:00:41,901 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:41" (1/1) ... [2023-11-19 08:00:41,903 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f70e6db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:41, skipping insertion in model container [2023-11-19 08:00:41,903 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:41" (1/1) ... [2023-11-19 08:00:41,972 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:00:42,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:42,556 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:00:42,656 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:42,710 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:00:42,710 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:00:42,718 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:00:42,719 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:42 WrapperNode [2023-11-19 08:00:42,719 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:42,721 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:42,721 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:00:42,721 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:00:42,732 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:42" (1/1) ... [2023-11-19 08:00:42,764 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:42" (1/1) ... [2023-11-19 08:00:42,813 INFO L138 Inliner]: procedures = 177, calls = 88, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 187 [2023-11-19 08:00:42,813 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:42,814 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:00:42,814 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:00:42,814 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:00:42,823 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:42" (1/1) ... [2023-11-19 08:00:42,824 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:42" (1/1) ... [2023-11-19 08:00:42,830 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:42" (1/1) ... [2023-11-19 08:00:42,830 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:42" (1/1) ... [2023-11-19 08:00:42,845 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:42" (1/1) ... [2023-11-19 08:00:42,848 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:42" (1/1) ... [2023-11-19 08:00:42,852 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:42" (1/1) ... [2023-11-19 08:00:42,855 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:42" (1/1) ... [2023-11-19 08:00:42,862 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:00:42,863 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:00:42,867 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:00:42,883 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:00:42,885 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:42" (1/1) ... [2023-11-19 08:00:42,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:42,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede29521-d48f-47c1-9df9-5ccc98747e99/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:42,921 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede29521-d48f-47c1-9df9-5ccc98747e99/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:00:42,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede29521-d48f-47c1-9df9-5ccc98747e99/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:00:42,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:00:42,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:00:42,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 08:00:42,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:00:42,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:00:42,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:00:42,974 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-19 08:00:42,974 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-19 08:00:42,975 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-19 08:00:42,975 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-19 08:00:42,975 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-19 08:00:42,975 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-19 08:00:42,975 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-11-19 08:00:42,976 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-11-19 08:00:42,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:00:42,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 08:00:42,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:00:42,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:00:42,978 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:00:43,171 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:00:43,173 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:00:43,917 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:00:44,839 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:00:44,840 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 08:00:44,844 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:44 BoogieIcfgContainer [2023-11-19 08:00:44,844 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:00:44,847 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:00:44,847 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:00:44,850 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:00:44,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:00:41" (1/3) ... [2023-11-19 08:00:44,851 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11459e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:44, skipping insertion in model container [2023-11-19 08:00:44,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:42" (2/3) ... [2023-11-19 08:00:44,852 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11459e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:44, skipping insertion in model container [2023-11-19 08:00:44,852 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:44" (3/3) ... [2023-11-19 08:00:44,853 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_power.oepc.i [2023-11-19 08:00:44,873 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:00:44,874 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 56 error locations. [2023-11-19 08:00:44,874 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:00:45,132 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:00:45,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 257 transitions, 530 flow [2023-11-19 08:00:45,306 INFO L124 PetriNetUnfolderBase]: 49/253 cut-off events. [2023-11-19 08:00:45,306 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:45,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 253 events. 49/253 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 403 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 194. Up to 5 conditions per place. [2023-11-19 08:00:45,317 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 257 transitions, 530 flow [2023-11-19 08:00:45,331 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 253 transitions, 518 flow [2023-11-19 08:00:45,335 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:00:45,345 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 253 transitions, 518 flow [2023-11-19 08:00:45,348 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 253 transitions, 518 flow [2023-11-19 08:00:45,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 253 transitions, 518 flow [2023-11-19 08:00:45,428 INFO L124 PetriNetUnfolderBase]: 49/253 cut-off events. [2023-11-19 08:00:45,428 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:45,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 253 events. 49/253 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 398 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 194. Up to 5 conditions per place. [2023-11-19 08:00:45,447 INFO L119 LiptonReduction]: Number of co-enabled transitions 21418 [2023-11-19 08:01:06,470 INFO L134 LiptonReduction]: Checked pairs total: 58086 [2023-11-19 08:01:06,471 INFO L136 LiptonReduction]: Total number of compositions: 264 [2023-11-19 08:01:06,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:01:06,496 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5b4d90f1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:01:06,496 INFO L358 AbstractCegarLoop]: Starting to check reachability of 88 error locations. [2023-11-19 08:01:06,498 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:01:06,498 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-19 08:01:06,499 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:01:06,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:06,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 08:01:06,500 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2023-11-19 08:01:06,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:06,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1465, now seen corresponding path program 1 times [2023-11-19 08:01:06,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:06,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000250659] [2023-11-19 08:01:06,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:06,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:06,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:06,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:06,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000250659] [2023-11-19 08:01:06,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000250659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:06,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:06,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 08:01:06,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044561544] [2023-11-19 08:01:06,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:06,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:01:06,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:06,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:01:06,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:01:06,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 521 [2023-11-19 08:01:06,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 91 transitions, 194 flow. Second operand has 2 states, 2 states have (on average 150.5) internal successors, (301), 2 states have internal predecessors, (301), 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) [2023-11-19 08:01:06,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:06,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 521 [2023-11-19 08:01:06,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:28,792 INFO L124 PetriNetUnfolderBase]: 91468/121721 cut-off events. [2023-11-19 08:01:28,793 INFO L125 PetriNetUnfolderBase]: For 150/150 co-relation queries the response was YES. [2023-11-19 08:01:29,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242158 conditions, 121721 events. 91468/121721 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 5944. Compared 775021 event pairs, 91468 based on Foata normal form. 0/61379 useless extension candidates. Maximal degree in co-relation 242146. Up to 120060 conditions per place. [2023-11-19 08:01:29,671 INFO L140 encePairwiseOnDemand]: 486/521 looper letters, 51 selfloop transitions, 0 changer transitions 0/54 dead transitions. [2023-11-19 08:01:29,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 54 transitions, 222 flow [2023-11-19 08:01:29,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:01:29,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 08:01:29,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 386 transitions. [2023-11-19 08:01:29,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3704414587332054 [2023-11-19 08:01:29,697 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 386 transitions. [2023-11-19 08:01:29,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 386 transitions. [2023-11-19 08:01:29,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:29,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 386 transitions. [2023-11-19 08:01:29,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 193.0) internal successors, (386), 2 states have internal predecessors, (386), 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) [2023-11-19 08:01:29,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 521.0) internal successors, (1563), 3 states have internal predecessors, (1563), 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) [2023-11-19 08:01:29,720 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 521.0) internal successors, (1563), 3 states have internal predecessors, (1563), 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) [2023-11-19 08:01:29,722 INFO L175 Difference]: Start difference. First operand has 101 places, 91 transitions, 194 flow. Second operand 2 states and 386 transitions. [2023-11-19 08:01:29,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 54 transitions, 222 flow [2023-11-19 08:01:29,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 54 transitions, 218 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 08:01:29,736 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 116 flow [2023-11-19 08:01:29,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=521, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=116, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-11-19 08:01:29,745 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -37 predicate places. [2023-11-19 08:01:29,745 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 116 flow [2023-11-19 08:01:29,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 150.5) internal successors, (301), 2 states have internal predecessors, (301), 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) [2023-11-19 08:01:29,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:29,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 08:01:29,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:01:29,747 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2023-11-19 08:01:29,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:29,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1446403, now seen corresponding path program 1 times [2023-11-19 08:01:29,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:29,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62837815] [2023-11-19 08:01:29,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:29,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:30,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:30,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62837815] [2023-11-19 08:01:30,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62837815] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:30,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:30,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:01:30,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110383432] [2023-11-19 08:01:30,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:30,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:30,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:30,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:30,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:30,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 521 [2023-11-19 08:01:30,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 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) [2023-11-19 08:01:30,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:30,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 521 [2023-11-19 08:01:30,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand