./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_03-munge_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_cb6f97e8-ba4d-4469-9c7e-ea0ebe87448d/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6f97e8-ba4d-4469-9c7e-ea0ebe87448d/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6f97e8-ba4d-4469-9c7e-ea0ebe87448d/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6f97e8-ba4d-4469-9c7e-ea0ebe87448d/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_03-munge_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6f97e8-ba4d-4469-9c7e-ea0ebe87448d/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6f97e8-ba4d-4469-9c7e-ea0ebe87448d/bin/uautomizer-verify-VRDe98Ueme --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 7df5d4e763d99c6ca9aa3d4daa03dcc5b8b9d65829db9a89ff85ebe5a14f3ac3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:46:42,659 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:46:42,779 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6f97e8-ba4d-4469-9c7e-ea0ebe87448d/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 10:46:42,788 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:46:42,789 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:46:42,832 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:46:42,833 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:46:42,833 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:46:42,834 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:46:42,840 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:46:42,840 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:46:42,841 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:46:42,842 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:46:42,844 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:46:42,844 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:46:42,845 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:46:42,845 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:46:42,845 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:46:42,846 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:46:42,846 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:46:42,847 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 10:46:42,847 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 10:46:42,848 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 10:46:42,848 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:46:42,849 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:46:42,849 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:46:42,849 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:46:42,850 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:46:42,851 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:46:42,851 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:46:42,853 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:46:42,853 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:46:42,853 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:46:42,854 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:46:42,854 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:46:42,854 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:46:42,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:46:42,855 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:46:42,855 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:46:42,855 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:46:42,855 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:46:42,856 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_cb6f97e8-ba4d-4469-9c7e-ea0ebe87448d/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6f97e8-ba4d-4469-9c7e-ea0ebe87448d/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7df5d4e763d99c6ca9aa3d4daa03dcc5b8b9d65829db9a89ff85ebe5a14f3ac3 [2023-11-26 10:46:43,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:46:43,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:46:43,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:46:43,254 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:46:43,254 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:46:43,256 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6f97e8-ba4d-4469-9c7e-ea0ebe87448d/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/goblint-regression/28-race_reach_03-munge_racing.i [2023-11-26 10:46:46,452 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:46:46,749 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:46:46,756 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6f97e8-ba4d-4469-9c7e-ea0ebe87448d/sv-benchmarks/c/goblint-regression/28-race_reach_03-munge_racing.i [2023-11-26 10:46:46,782 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6f97e8-ba4d-4469-9c7e-ea0ebe87448d/bin/uautomizer-verify-VRDe98Ueme/data/bcda26694/49b17d3e01ea458399f0a36f8507baa9/FLAG7ace4588d [2023-11-26 10:46:46,802 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6f97e8-ba4d-4469-9c7e-ea0ebe87448d/bin/uautomizer-verify-VRDe98Ueme/data/bcda26694/49b17d3e01ea458399f0a36f8507baa9 [2023-11-26 10:46:46,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:46:46,810 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:46:46,814 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:46:46,814 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:46:46,820 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:46:46,821 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:46:46" (1/1) ... [2023-11-26 10:46:46,822 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65e4f483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:46, skipping insertion in model container [2023-11-26 10:46:46,822 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:46:46" (1/1) ... [2023-11-26 10:46:46,889 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:46:47,376 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:46:47,391 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:46:47,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:46:47,535 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:46:47,536 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:47 WrapperNode [2023-11-26 10:46:47,536 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:46:47,537 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:46:47,538 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:46:47,538 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:46:47,546 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:47" (1/1) ... [2023-11-26 10:46:47,567 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:47" (1/1) ... [2023-11-26 10:46:47,606 INFO L138 Inliner]: procedures = 173, calls = 48, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 234 [2023-11-26 10:46:47,613 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:46:47,613 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:46:47,613 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:46:47,614 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:46:47,623 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:47" (1/1) ... [2023-11-26 10:46:47,623 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:47" (1/1) ... [2023-11-26 10:46:47,628 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:47" (1/1) ... [2023-11-26 10:46:47,650 INFO L175 MemorySlicer]: Split 21 memory accesses to 6 slices as follows [2, 2, 5, 2, 5, 5]. 24 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 0, 5, 0, 5, 5]. The 2 writes are split as follows [0, 1, 0, 1, 0, 0]. [2023-11-26 10:46:47,650 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:47" (1/1) ... [2023-11-26 10:46:47,650 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:47" (1/1) ... [2023-11-26 10:46:47,668 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:47" (1/1) ... [2023-11-26 10:46:47,681 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:47" (1/1) ... [2023-11-26 10:46:47,684 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:47" (1/1) ... [2023-11-26 10:46:47,686 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:47" (1/1) ... [2023-11-26 10:46:47,691 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:46:47,692 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:46:47,693 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:46:47,693 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:46:47,694 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:47" (1/1) ... [2023-11-26 10:46:47,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:46:47,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6f97e8-ba4d-4469-9c7e-ea0ebe87448d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:47,729 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6f97e8-ba4d-4469-9c7e-ea0ebe87448d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:46:47,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6f97e8-ba4d-4469-9c7e-ea0ebe87448d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:46:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:46:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:46:47,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:46:47,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:46:47,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 10:46:47,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-26 10:46:47,792 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-11-26 10:46:47,793 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-11-26 10:46:47,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:46:47,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:46:47,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:46:47,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:46:47,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 10:46:47,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-26 10:46:47,796 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 10:46:47,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:46:47,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:46:47,796 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-11-26 10:46:47,796 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-11-26 10:46:47,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:46:47,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:46:47,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:46:47,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:46:47,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:46:47,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 10:46:47,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-26 10:46:47,799 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 10:46:47,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:46:47,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:46:47,802 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 10:46:48,045 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:46:48,048 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:46:48,468 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:46:48,710 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:46:48,710 INFO L309 CfgBuilder]: Removed 24 assume(true) statements. [2023-11-26 10:46:48,712 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:46:48 BoogieIcfgContainer [2023-11-26 10:46:48,712 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:46:48,716 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:46:48,716 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:46:48,720 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:46:48,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:46:46" (1/3) ... [2023-11-26 10:46:48,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f44d909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:46:48, skipping insertion in model container [2023-11-26 10:46:48,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:47" (2/3) ... [2023-11-26 10:46:48,724 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f44d909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:46:48, skipping insertion in model container [2023-11-26 10:46:48,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:46:48" (3/3) ... [2023-11-26 10:46:48,727 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_03-munge_racing.i [2023-11-26 10:46:48,749 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:46:48,750 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-11-26 10:46:48,750 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:46:48,859 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-26 10:46:48,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 123 transitions, 266 flow [2023-11-26 10:46:48,982 INFO L124 PetriNetUnfolderBase]: 47/234 cut-off events. [2023-11-26 10:46:48,982 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-26 10:46:48,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 234 events. 47/234 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1250 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 139. Up to 8 conditions per place. [2023-11-26 10:46:48,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 123 transitions, 266 flow [2023-11-26 10:46:49,002 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 123 transitions, 266 flow [2023-11-26 10:46:49,012 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:46:49,019 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;@4f1c12e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:46:49,020 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2023-11-26 10:46:49,023 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:46:49,024 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-26 10:46:49,024 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:46:49,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:49,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:46:49,026 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-26 10:46:49,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:49,033 INFO L85 PathProgramCache]: Analyzing trace with hash 619049, now seen corresponding path program 1 times [2023-11-26 10:46:49,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:49,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550561998] [2023-11-26 10:46:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:49,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:49,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:49,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:49,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550561998] [2023-11-26 10:46:49,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550561998] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:49,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:49,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:46:49,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943280630] [2023-11-26 10:46:49,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:49,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:46:49,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:49,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:46:49,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:49,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 123 [2023-11-26 10:46:49,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 123 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:49,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:49,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 123 [2023-11-26 10:46:49,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:51,350 INFO L124 PetriNetUnfolderBase]: 5855/11699 cut-off events. [2023-11-26 10:46:51,350 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2023-11-26 10:46:51,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20834 conditions, 11699 events. 5855/11699 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 97021 event pairs, 4068 based on Foata normal form. 2515/13221 useless extension candidates. Maximal degree in co-relation 19836. Up to 6749 conditions per place. [2023-11-26 10:46:51,462 INFO L140 encePairwiseOnDemand]: 95/123 looper letters, 90 selfloop transitions, 2 changer transitions 0/131 dead transitions. [2023-11-26 10:46:51,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 131 transitions, 466 flow [2023-11-26 10:46:51,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:46:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:46:51,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2023-11-26 10:46:51,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7018970189701897 [2023-11-26 10:46:51,477 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 259 transitions. [2023-11-26 10:46:51,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 259 transitions. [2023-11-26 10:46:51,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:51,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 259 transitions. [2023-11-26 10:46:51,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2023-11-26 10:46:51,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 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) [2023-11-26 10:46:51,491 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 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) [2023-11-26 10:46:51,493 INFO L175 Difference]: Start difference. First operand has 98 places, 123 transitions, 266 flow. Second operand 3 states and 259 transitions. [2023-11-26 10:46:51,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 131 transitions, 466 flow [2023-11-26 10:46:51,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 131 transitions, 466 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 10:46:51,509 INFO L231 Difference]: Finished difference. Result has 96 places, 95 transitions, 214 flow [2023-11-26 10:46:51,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=96, PETRI_TRANSITIONS=95} [2023-11-26 10:46:51,515 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, -2 predicate places. [2023-11-26 10:46:51,516 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 95 transitions, 214 flow [2023-11-26 10:46:51,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:51,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:51,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:46:51,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:46:51,518 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-26 10:46:51,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:51,519 INFO L85 PathProgramCache]: Analyzing trace with hash 619050, now seen corresponding path program 1 times [2023-11-26 10:46:51,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:51,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544710155] [2023-11-26 10:46:51,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:51,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:51,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:51,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544710155] [2023-11-26 10:46:51,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544710155] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:51,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:51,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:46:51,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92646125] [2023-11-26 10:46:51,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:51,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:46:51,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:51,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:46:51,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:51,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 123 [2023-11-26 10:46:51,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 95 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2023-11-26 10:46:51,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:51,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 123 [2023-11-26 10:46:51,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:53,182 INFO L124 PetriNetUnfolderBase]: 4948/10321 cut-off events. [2023-11-26 10:46:53,183 INFO L125 PetriNetUnfolderBase]: For 507/507 co-relation queries the response was YES. [2023-11-26 10:46:53,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18536 conditions, 10321 events. 4948/10321 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 86214 event pairs, 2160 based on Foata normal form. 1/9280 useless extension candidates. Maximal degree in co-relation 17754. Up to 7669 conditions per place. [2023-11-26 10:46:53,277 INFO L140 encePairwiseOnDemand]: 119/123 looper letters, 72 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2023-11-26 10:46:53,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 114 transitions, 400 flow [2023-11-26 10:46:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:46:53,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:46:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2023-11-26 10:46:53,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2023-11-26 10:46:53,285 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2023-11-26 10:46:53,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2023-11-26 10:46:53,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:53,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2023-11-26 10:46:53,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 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) [2023-11-26 10:46:53,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 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) [2023-11-26 10:46:53,380 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 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) [2023-11-26 10:46:53,380 INFO L175 Difference]: Start difference. First operand has 96 places, 95 transitions, 214 flow. Second operand 3 states and 202 transitions. [2023-11-26 10:46:53,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 114 transitions, 400 flow [2023-11-26 10:46:53,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 114 transitions, 396 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:46:53,410 INFO L231 Difference]: Finished difference. Result has 97 places, 95 transitions, 220 flow [2023-11-26 10:46:53,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=97, PETRI_TRANSITIONS=95} [2023-11-26 10:46:53,411 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, -1 predicate places. [2023-11-26 10:46:53,412 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 95 transitions, 220 flow [2023-11-26 10:46:53,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2023-11-26 10:46:53,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:53,412 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-26 10:46:53,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:46:53,413 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-26 10:46:53,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:53,414 INFO L85 PathProgramCache]: Analyzing trace with hash 496508003, now seen corresponding path program 1 times [2023-11-26 10:46:53,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:53,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103812856] [2023-11-26 10:46:53,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:53,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:53,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:53,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103812856] [2023-11-26 10:46:53,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103812856] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:53,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916013403] [2023-11-26 10:46:53,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:53,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:53,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6f97e8-ba4d-4469-9c7e-ea0ebe87448d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:53,675 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6f97e8-ba4d-4469-9c7e-ea0ebe87448d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:53,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6f97e8-ba4d-4469-9c7e-ea0ebe87448d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:46:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:53,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:46:53,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:53,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:46:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:53,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:54,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:54,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916013403] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:54,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:54,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-26 10:46:54,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852882201] [2023-11-26 10:46:54,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:54,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:54,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:54,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:54,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:54,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 123 [2023-11-26 10:46:54,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 95 transitions, 220 flow. Second operand has 9 states, 9 states have (on average 43.333333333333336) internal successors, (390), 9 states have internal predecessors, (390), 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) [2023-11-26 10:46:54,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:54,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 123 [2023-11-26 10:46:54,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:54,346 INFO L124 PetriNetUnfolderBase]: 55/165 cut-off events. [2023-11-26 10:46:54,347 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-26 10:46:54,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 165 events. 55/165 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 671 event pairs, 0 based on Foata normal form. 38/196 useless extension candidates. Maximal degree in co-relation 339. Up to 111 conditions per place. [2023-11-26 10:46:54,348 INFO L140 encePairwiseOnDemand]: 119/123 looper letters, 41 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-11-26 10:46:54,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 210 flow [2023-11-26 10:46:54,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:46:54,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:46:54,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 209 transitions. [2023-11-26 10:46:54,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4247967479674797 [2023-11-26 10:46:54,351 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 209 transitions. [2023-11-26 10:46:54,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 209 transitions. [2023-11-26 10:46:54,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:54,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 209 transitions. [2023-11-26 10:46:54,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 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) [2023-11-26 10:46:54,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 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) [2023-11-26 10:46:54,356 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 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) [2023-11-26 10:46:54,356 INFO L175 Difference]: Start difference. First operand has 97 places, 95 transitions, 220 flow. Second operand 4 states and 209 transitions. [2023-11-26 10:46:54,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 210 flow [2023-11-26 10:46:54,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 204 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 10:46:54,359 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 82 flow [2023-11-26 10:46:54,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-11-26 10:46:54,360 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, -55 predicate places. [2023-11-26 10:46:54,360 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 82 flow [2023-11-26 10:46:54,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 43.333333333333336) internal successors, (390), 9 states have internal predecessors, (390), 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) [2023-11-26 10:46:54,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:54,361 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-26 10:46:54,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6f97e8-ba4d-4469-9c7e-ea0ebe87448d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:54,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb6f97e8-ba4d-4469-9c7e-ea0ebe87448d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:54,567 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-26 10:46:54,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:54,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1788120391, now seen corresponding path program 1 times [2023-11-26 10:46:54,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:54,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614456117] [2023-11-26 10:46:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:54,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:46:54,590 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 10:46:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:46:54,635 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 10:46:54,635 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 10:46:54,638 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 15 remaining) [2023-11-26 10:46:54,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK (13 of 15 remaining) [2023-11-26 10:46:54,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 15 remaining) [2023-11-26 10:46:54,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2023-11-26 10:46:54,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2023-11-26 10:46:54,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2023-11-26 10:46:54,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2023-11-26 10:46:54,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2023-11-26 10:46:54,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2023-11-26 10:46:54,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2023-11-26 10:46:54,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (4 of 15 remaining) [2023-11-26 10:46:54,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 15 remaining) [2023-11-26 10:46:54,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 15 remaining) [2023-11-26 10:46:54,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 15 remaining) [2023-11-26 10:46:54,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2023-11-26 10:46:54,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:46:54,646 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-26 10:46:54,649 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-26 10:46:54,649 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-26 10:46:54,713 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-11-26 10:46:54,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 217 transitions, 478 flow [2023-11-26 10:46:54,844 INFO L124 PetriNetUnfolderBase]: 161/719 cut-off events. [2023-11-26 10:46:54,845 INFO L125 PetriNetUnfolderBase]: For 72/79 co-relation queries the response was YES. [2023-11-26 10:46:54,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 808 conditions, 719 events. 161/719 cut-off events. For 72/79 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4883 event pairs, 2 based on Foata normal form. 0/459 useless extension candidates. Maximal degree in co-relation 445. Up to 32 conditions per place. [2023-11-26 10:46:54,860 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 217 transitions, 478 flow [2023-11-26 10:46:54,873 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 217 transitions, 478 flow [2023-11-26 10:46:54,875 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:46:54,881 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;@4f1c12e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:46:54,882 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-11-26 10:46:54,884 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:46:54,885 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-26 10:46:54,890 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:46:54,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:54,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:46:54,892 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 10:46:54,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:54,893 INFO L85 PathProgramCache]: Analyzing trace with hash 832544, now seen corresponding path program 1 times [2023-11-26 10:46:54,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:54,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125800315] [2023-11-26 10:46:54,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:54,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:54,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:54,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125800315] [2023-11-26 10:46:54,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125800315] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:54,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:54,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:46:54,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738521096] [2023-11-26 10:46:54,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:54,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:46:54,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:54,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:46:54,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:54,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 217 [2023-11-26 10:46:54,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 217 transitions, 478 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2023-11-26 10:46:54,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:54,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 217 [2023-11-26 10:46:54,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand