./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54398140-9778-4795-9b18-e1cffd5d10c9/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54398140-9778-4795-9b18-e1cffd5d10c9/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_54398140-9778-4795-9b18-e1cffd5d10c9/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54398140-9778-4795-9b18-e1cffd5d10c9/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54398140-9778-4795-9b18-e1cffd5d10c9/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_54398140-9778-4795-9b18-e1cffd5d10c9/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 4e7050d36e2131966739d0040816e49ede1f1e8b3b668f65d41876950193b1d8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:50:57,821 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:50:57,945 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54398140-9778-4795-9b18-e1cffd5d10c9/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:50:57,954 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:50:57,955 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:50:57,993 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:50:57,994 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:50:57,994 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:50:57,995 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:50:58,002 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:50:58,004 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:50:58,005 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:50:58,005 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:50:58,006 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:50:58,006 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:50:58,007 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:50:58,007 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:50:58,008 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:50:58,008 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:50:58,009 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:50:58,009 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:50:58,010 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:50:58,010 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:50:58,011 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:50:58,011 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:50:58,012 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:50:58,012 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:50:58,013 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:50:58,014 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:50:58,015 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:58,016 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:50:58,017 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:50:58,017 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:50:58,017 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:50:58,018 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:50:58,018 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:50:58,018 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:50:58,019 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:50:58,019 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_54398140-9778-4795-9b18-e1cffd5d10c9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54398140-9778-4795-9b18-e1cffd5d10c9/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e7050d36e2131966739d0040816e49ede1f1e8b3b668f65d41876950193b1d8 [2023-11-19 07:50:58,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:50:58,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:50:58,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:50:58,340 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:50:58,341 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:50:58,342 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54398140-9778-4795-9b18-e1cffd5d10c9/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2023-11-19 07:51:01,610 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:51:01,880 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:51:01,881 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54398140-9778-4795-9b18-e1cffd5d10c9/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2023-11-19 07:51:01,906 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54398140-9778-4795-9b18-e1cffd5d10c9/bin/uautomizer-verify-uCwYo4JHxu/data/2cb6f8981/374be37fdb6d46f9bc5996cdff7eb728/FLAG648f9864c [2023-11-19 07:51:01,922 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54398140-9778-4795-9b18-e1cffd5d10c9/bin/uautomizer-verify-uCwYo4JHxu/data/2cb6f8981/374be37fdb6d46f9bc5996cdff7eb728 [2023-11-19 07:51:01,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:51:01,931 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:51:01,933 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:51:01,933 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:51:01,938 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:51:01,939 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:51:01" (1/1) ... [2023-11-19 07:51:01,940 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e452fb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:01, skipping insertion in model container [2023-11-19 07:51:01,940 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:51:01" (1/1) ... [2023-11-19 07:51:02,002 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:51:02,507 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:51:02,607 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:51:02,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:51:02,776 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:51:02,777 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:02 WrapperNode [2023-11-19 07:51:02,777 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:51:02,779 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:51:02,779 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:51:02,779 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:51:02,787 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:02" (1/1) ... [2023-11-19 07:51:02,842 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:02" (1/1) ... [2023-11-19 07:51:02,880 INFO L138 Inliner]: procedures = 278, calls = 64, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 251 [2023-11-19 07:51:02,880 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:51:02,881 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:51:02,881 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:51:02,881 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:51:02,892 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:02" (1/1) ... [2023-11-19 07:51:02,892 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:02" (1/1) ... [2023-11-19 07:51:02,899 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:02" (1/1) ... [2023-11-19 07:51:02,900 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:02" (1/1) ... [2023-11-19 07:51:02,913 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:02" (1/1) ... [2023-11-19 07:51:02,919 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:02" (1/1) ... [2023-11-19 07:51:02,922 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:02" (1/1) ... [2023-11-19 07:51:02,925 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:02" (1/1) ... [2023-11-19 07:51:02,930 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:51:02,931 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:51:02,931 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:51:02,932 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:51:02,933 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:02" (1/1) ... [2023-11-19 07:51:02,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:51:02,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54398140-9778-4795-9b18-e1cffd5d10c9/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:02,977 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54398140-9778-4795-9b18-e1cffd5d10c9/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:51:02,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54398140-9778-4795-9b18-e1cffd5d10c9/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:51:03,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:51:03,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 07:51:03,010 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-11-19 07:51:03,010 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-11-19 07:51:03,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:51:03,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:51:03,010 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-11-19 07:51:03,011 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-11-19 07:51:03,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:51:03,011 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:51:03,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:51:03,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:51:03,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 07:51:03,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:51:03,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:51:03,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:51:03,013 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 07:51:03,174 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:51:03,176 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:51:03,764 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:51:03,777 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:51:03,777 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-19 07:51:03,783 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:51:03 BoogieIcfgContainer [2023-11-19 07:51:03,783 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:51:03,786 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:51:03,786 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:51:03,790 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:51:03,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:51:01" (1/3) ... [2023-11-19 07:51:03,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f0342d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:51:03, skipping insertion in model container [2023-11-19 07:51:03,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:02" (2/3) ... [2023-11-19 07:51:03,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f0342d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:51:03, skipping insertion in model container [2023-11-19 07:51:03,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:51:03" (3/3) ... [2023-11-19 07:51:03,794 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing.i [2023-11-19 07:51:03,814 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:51:03,815 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-19 07:51:03,815 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:51:03,961 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-19 07:51:04,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 298 places, 322 transitions, 664 flow [2023-11-19 07:51:04,240 INFO L124 PetriNetUnfolderBase]: 61/607 cut-off events. [2023-11-19 07:51:04,240 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-19 07:51:04,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 607 events. 61/607 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2724 event pairs, 0 based on Foata normal form. 0/454 useless extension candidates. Maximal degree in co-relation 301. Up to 8 conditions per place. [2023-11-19 07:51:04,256 INFO L82 GeneralOperation]: Start removeDead. Operand has 298 places, 322 transitions, 664 flow [2023-11-19 07:51:04,270 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 298 places, 322 transitions, 664 flow [2023-11-19 07:51:04,274 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:51:04,284 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 298 places, 322 transitions, 664 flow [2023-11-19 07:51:04,287 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 298 places, 322 transitions, 664 flow [2023-11-19 07:51:04,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 298 places, 322 transitions, 664 flow [2023-11-19 07:51:04,415 INFO L124 PetriNetUnfolderBase]: 61/607 cut-off events. [2023-11-19 07:51:04,416 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-19 07:51:04,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 607 events. 61/607 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2724 event pairs, 0 based on Foata normal form. 0/454 useless extension candidates. Maximal degree in co-relation 301. Up to 8 conditions per place. [2023-11-19 07:51:04,458 INFO L119 LiptonReduction]: Number of co-enabled transitions 36610 [2023-11-19 07:51:20,182 INFO L134 LiptonReduction]: Checked pairs total: 84584 [2023-11-19 07:51:20,182 INFO L136 LiptonReduction]: Total number of compositions: 312 [2023-11-19 07:51:20,198 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:51:20,206 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;@2777d19a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:51:20,207 INFO L358 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2023-11-19 07:51:20,209 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:51:20,210 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-11-19 07:51:20,210 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:51:20,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:20,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:51:20,211 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-19 07:51:20,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:20,215 INFO L85 PathProgramCache]: Analyzing trace with hash 41452, now seen corresponding path program 1 times [2023-11-19 07:51:20,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:20,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902400233] [2023-11-19 07:51:20,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:20,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:20,467 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 07:51:20,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:20,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902400233] [2023-11-19 07:51:20,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902400233] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:20,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:20,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:51:20,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116441771] [2023-11-19 07:51:20,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:20,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:51:20,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:20,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:51:20,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:51:20,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 634 [2023-11-19 07:51:20,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 116 transitions, 252 flow. Second operand has 2 states, 2 states have (on average 295.0) internal successors, (590), 2 states have internal predecessors, (590), 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 07:51:20,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:20,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 634 [2023-11-19 07:51:20,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:26,212 INFO L124 PetriNetUnfolderBase]: 19887/33347 cut-off events. [2023-11-19 07:51:26,212 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2023-11-19 07:51:26,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63918 conditions, 33347 events. 19887/33347 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 1054. Compared 258381 event pairs, 19132 based on Foata normal form. 1576/17587 useless extension candidates. Maximal degree in co-relation 60968. Up to 30428 conditions per place. [2023-11-19 07:51:26,526 INFO L140 encePairwiseOnDemand]: 618/634 looper letters, 83 selfloop transitions, 0 changer transitions 0/99 dead transitions. [2023-11-19 07:51:26,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 99 transitions, 384 flow [2023-11-19 07:51:26,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:51:26,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:51:26,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 687 transitions. [2023-11-19 07:51:26,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5417981072555205 [2023-11-19 07:51:26,552 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 687 transitions. [2023-11-19 07:51:26,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 687 transitions. [2023-11-19 07:51:26,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:26,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 687 transitions. [2023-11-19 07:51:26,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 343.5) internal successors, (687), 2 states have internal predecessors, (687), 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 07:51:26,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 634.0) internal successors, (1902), 3 states have internal predecessors, (1902), 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 07:51:26,674 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 634.0) internal successors, (1902), 3 states have internal predecessors, (1902), 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 07:51:26,677 INFO L175 Difference]: Start difference. First operand has 102 places, 116 transitions, 252 flow. Second operand 2 states and 687 transitions. [2023-11-19 07:51:26,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 99 transitions, 384 flow [2023-11-19 07:51:26,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 99 transitions, 384 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:51:26,713 INFO L231 Difference]: Finished difference. Result has 98 places, 99 transitions, 218 flow [2023-11-19 07:51:26,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=218, PETRI_PLACES=98, PETRI_TRANSITIONS=99} [2023-11-19 07:51:26,723 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -4 predicate places. [2023-11-19 07:51:26,723 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 99 transitions, 218 flow [2023-11-19 07:51:26,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 295.0) internal successors, (590), 2 states have internal predecessors, (590), 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 07:51:26,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:26,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:51:26,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:51:26,727 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-19 07:51:26,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:26,728 INFO L85 PathProgramCache]: Analyzing trace with hash 41453, now seen corresponding path program 1 times [2023-11-19 07:51:26,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:26,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526658204] [2023-11-19 07:51:26,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:26,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:27,160 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 07:51:27,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:27,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526658204] [2023-11-19 07:51:27,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526658204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:27,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:27,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:51:27,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439045266] [2023-11-19 07:51:27,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:27,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:51:27,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:27,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:51:27,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:51:27,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 634 [2023-11-19 07:51:27,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 99 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 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 07:51:27,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:27,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 634 [2023-11-19 07:51:27,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:31,699 INFO L124 PetriNetUnfolderBase]: 18510/30565 cut-off events. [2023-11-19 07:51:31,700 INFO L125 PetriNetUnfolderBase]: For 164/164 co-relation queries the response was YES. [2023-11-19 07:51:31,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59198 conditions, 30565 events. 18510/30565 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 1083. Compared 236791 event pairs, 12700 based on Foata normal form. 0/14916 useless extension candidates. Maximal degree in co-relation 59193. Up to 20054 conditions per place. [2023-11-19 07:51:31,916 INFO L140 encePairwiseOnDemand]: 629/634 looper letters, 126 selfloop transitions, 2 changer transitions 0/144 dead transitions. [2023-11-19 07:51:31,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 144 transitions, 564 flow [2023-11-19 07:51:31,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:51:31,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:51:31,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 998 transitions. [2023-11-19 07:51:31,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247108307045215 [2023-11-19 07:51:31,922 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 998 transitions. [2023-11-19 07:51:31,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 998 transitions. [2023-11-19 07:51:31,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:31,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 998 transitions. [2023-11-19 07:51:31,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 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 07:51:31,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 634.0) internal successors, (2536), 4 states have internal predecessors, (2536), 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 07:51:31,939 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 634.0) internal successors, (2536), 4 states have internal predecessors, (2536), 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 07:51:31,939 INFO L175 Difference]: Start difference. First operand has 98 places, 99 transitions, 218 flow. Second operand 3 states and 998 transitions. [2023-11-19 07:51:31,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 144 transitions, 564 flow [2023-11-19 07:51:31,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 144 transitions, 564 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:51:31,951 INFO L231 Difference]: Finished difference. Result has 100 places, 98 transitions, 226 flow [2023-11-19 07:51:31,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=100, PETRI_TRANSITIONS=98} [2023-11-19 07:51:31,953 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -2 predicate places. [2023-11-19 07:51:31,954 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 98 transitions, 226 flow [2023-11-19 07:51:31,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 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 07:51:31,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:31,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:51:31,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:51:31,956 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-19 07:51:31,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:31,957 INFO L85 PathProgramCache]: Analyzing trace with hash 41451, now seen corresponding path program 1 times [2023-11-19 07:51:31,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:31,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548738849] [2023-11-19 07:51:31,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:31,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:32,212 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 07:51:32,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:32,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548738849] [2023-11-19 07:51:32,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548738849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:32,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:32,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:51:32,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898236964] [2023-11-19 07:51:32,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:32,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:51:32,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:32,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:51:32,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:51:32,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 634 [2023-11-19 07:51:32,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 98 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 283.6666666666667) internal successors, (851), 3 states have internal predecessors, (851), 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 07:51:32,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:32,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 634 [2023-11-19 07:51:32,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:36,295 INFO L124 PetriNetUnfolderBase]: 18600/31261 cut-off events. [2023-11-19 07:51:36,295 INFO L125 PetriNetUnfolderBase]: For 928/928 co-relation queries the response was YES. [2023-11-19 07:51:36,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61241 conditions, 31261 events. 18600/31261 cut-off events. For 928/928 co-relation queries the response was YES. Maximal size of possible extension queue 1038. Compared 241283 event pairs, 17875 based on Foata normal form. 0/16183 useless extension candidates. Maximal degree in co-relation 61234. Up to 28495 conditions per place. [2023-11-19 07:51:36,491 INFO L140 encePairwiseOnDemand]: 630/634 looper letters, 81 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-11-19 07:51:36,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 99 transitions, 394 flow [2023-11-19 07:51:36,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:51:36,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:51:36,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 934 transitions. [2023-11-19 07:51:36,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491062039957939 [2023-11-19 07:51:36,496 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 934 transitions. [2023-11-19 07:51:36,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 934 transitions. [2023-11-19 07:51:36,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:36,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 934 transitions. [2023-11-19 07:51:36,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 311.3333333333333) internal successors, (934), 3 states have internal predecessors, (934), 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 07:51:36,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 634.0) internal successors, (2536), 4 states have internal predecessors, (2536), 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 07:51:36,510 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 634.0) internal successors, (2536), 4 states have internal predecessors, (2536), 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 07:51:36,510 INFO L175 Difference]: Start difference. First operand has 100 places, 98 transitions, 226 flow. Second operand 3 states and 934 transitions. [2023-11-19 07:51:36,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 99 transitions, 394 flow [2023-11-19 07:51:36,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 99 transitions, 390 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:51:36,528 INFO L231 Difference]: Finished difference. Result has 101 places, 99 transitions, 236 flow [2023-11-19 07:51:36,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=101, PETRI_TRANSITIONS=99} [2023-11-19 07:51:36,530 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -1 predicate places. [2023-11-19 07:51:36,530 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 99 transitions, 236 flow [2023-11-19 07:51:36,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.6666666666667) internal successors, (851), 3 states have internal predecessors, (851), 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 07:51:36,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:36,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:51:36,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:51:36,532 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-19 07:51:36,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:36,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1286721, now seen corresponding path program 1 times [2023-11-19 07:51:36,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:36,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599948231] [2023-11-19 07:51:36,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:36,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:36,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:36,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599948231] [2023-11-19 07:51:36,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599948231] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:36,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154640999] [2023-11-19 07:51:36,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:36,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:36,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54398140-9778-4795-9b18-e1cffd5d10c9/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:36,899 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54398140-9778-4795-9b18-e1cffd5d10c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:36,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54398140-9778-4795-9b18-e1cffd5d10c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:51:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:37,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 07:51:37,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:37,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:51:37,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 07:51:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:37,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:37,374 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:37,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2023-11-19 07:51:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:37,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154640999] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:37,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:51:37,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 07:51:37,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464042196] [2023-11-19 07:51:37,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:37,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:51:37,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:37,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:51:37,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:51:40,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 634 [2023-11-19 07:51:40,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 99 transitions, 236 flow. Second operand has 8 states, 8 states have (on average 280.125) internal successors, (2241), 8 states have internal predecessors, (2241), 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 07:51:40,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:40,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 634 [2023-11-19 07:51:40,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:44,129 INFO L124 PetriNetUnfolderBase]: 18602/31266 cut-off events. [2023-11-19 07:51:44,129 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2023-11-19 07:51:44,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60718 conditions, 31266 events. 18602/31266 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 1038. Compared 241407 event pairs, 17875 based on Foata normal form. 0/15642 useless extension candidates. Maximal degree in co-relation 60710. Up to 28497 conditions per place. [2023-11-19 07:51:44,300 INFO L140 encePairwiseOnDemand]: 630/634 looper letters, 81 selfloop transitions, 7 changer transitions 0/104 dead transitions. [2023-11-19 07:51:44,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 104 transitions, 432 flow [2023-11-19 07:51:44,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:51:44,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:51:44,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1766 transitions. [2023-11-19 07:51:44,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46424815983175605 [2023-11-19 07:51:44,309 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1766 transitions. [2023-11-19 07:51:44,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1766 transitions. [2023-11-19 07:51:44,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:44,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1766 transitions. [2023-11-19 07:51:44,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 294.3333333333333) internal successors, (1766), 6 states have internal predecessors, (1766), 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 07:51:44,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 634.0) internal successors, (4438), 7 states have internal predecessors, (4438), 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 07:51:44,333 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 634.0) internal successors, (4438), 7 states have internal predecessors, (4438), 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 07:51:44,333 INFO L175 Difference]: Start difference. First operand has 101 places, 99 transitions, 236 flow. Second operand 6 states and 1766 transitions. [2023-11-19 07:51:44,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 104 transitions, 432 flow [2023-11-19 07:51:44,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 104 transitions, 428 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:51:44,346 INFO L231 Difference]: Finished difference. Result has 108 places, 104 transitions, 284 flow [2023-11-19 07:51:44,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=284, PETRI_PLACES=108, PETRI_TRANSITIONS=104} [2023-11-19 07:51:44,348 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 6 predicate places. [2023-11-19 07:51:44,348 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 104 transitions, 284 flow [2023-11-19 07:51:44,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 280.125) internal successors, (2241), 8 states have internal predecessors, (2241), 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 07:51:44,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:44,351 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-19 07:51:44,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54398140-9778-4795-9b18-e1cffd5d10c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:51:44,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54398140-9778-4795-9b18-e1cffd5d10c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:44,560 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-19 07:51:44,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:44,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1236592440, now seen corresponding path program 1 times [2023-11-19 07:51:44,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:44,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590518667] [2023-11-19 07:51:44,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:44,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:44,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:51:44,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:44,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590518667] [2023-11-19 07:51:44,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590518667] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:44,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:44,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:51:44,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586378277] [2023-11-19 07:51:44,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:44,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:51:44,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:44,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:51:44,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:51:44,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 634 [2023-11-19 07:51:44,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 104 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 285.3333333333333) internal successors, (856), 3 states have internal predecessors, (856), 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 07:51:44,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:44,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 634 [2023-11-19 07:51:44,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand