./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a 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_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU --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 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:18:38,992 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:18:39,091 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:18:39,096 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:18:39,097 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:18:39,131 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:18:39,132 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:18:39,132 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:18:39,135 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:18:39,136 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:18:39,136 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:18:39,137 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:18:39,138 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:18:39,138 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:18:39,139 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:18:39,139 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:18:39,140 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:18:39,140 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:18:39,141 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:18:39,141 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:18:39,142 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:18:39,146 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:18:39,146 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:18:39,147 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:18:39,147 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:18:39,147 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:18:39,147 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:18:39,148 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:18:39,148 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:18:39,148 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:18:39,148 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:18:39,149 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:18:39,149 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:18:39,149 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:18:39,151 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:18:39,151 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:18:39,151 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:18:39,152 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:18:39,152 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:18:39,152 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:18:39,152 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:18:39,153 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:18:39,153 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_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba [2024-10-31 22:18:39,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:18:39,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:18:39,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:18:39,524 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:18:39,524 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:18:39,526 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i Unable to find full path for "g++" [2024-10-31 22:18:41,568 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:18:41,875 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:18:41,875 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2024-10-31 22:18:41,903 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/data/2e8e4949e/6ddb8e03b09942ea8fd1dc4355d2e76a/FLAG99dc4f4c8 [2024-10-31 22:18:41,920 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/data/2e8e4949e/6ddb8e03b09942ea8fd1dc4355d2e76a [2024-10-31 22:18:41,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:18:41,924 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:18:41,926 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:18:41,926 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:18:41,932 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:18:41,933 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:18:41" (1/1) ... [2024-10-31 22:18:41,934 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@230bfaeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:41, skipping insertion in model container [2024-10-31 22:18:41,935 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:18:41" (1/1) ... [2024-10-31 22:18:42,006 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:18:42,596 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:18:42,635 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:18:42,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:18:42,762 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:18:42,762 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:42 WrapperNode [2024-10-31 22:18:42,763 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:18:42,764 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:18:42,764 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:18:42,764 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:18:42,772 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:42" (1/1) ... [2024-10-31 22:18:42,789 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:42" (1/1) ... [2024-10-31 22:18:42,839 INFO L138 Inliner]: procedures = 272, calls = 96, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 281 [2024-10-31 22:18:42,839 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:18:42,844 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:18:42,844 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:18:42,844 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:18:42,855 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:42" (1/1) ... [2024-10-31 22:18:42,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:42" (1/1) ... [2024-10-31 22:18:42,862 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:42" (1/1) ... [2024-10-31 22:18:42,886 INFO L175 MemorySlicer]: Split 79 memory accesses to 4 slices as follows [2, 5, 70, 2]. 89 percent of accesses are in the largest equivalence class. The 67 initializations are split as follows [2, 5, 60, 0]. The 5 writes are split as follows [0, 0, 4, 1]. [2024-10-31 22:18:42,886 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:42" (1/1) ... [2024-10-31 22:18:42,886 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:42" (1/1) ... [2024-10-31 22:18:42,898 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:42" (1/1) ... [2024-10-31 22:18:42,903 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:42" (1/1) ... [2024-10-31 22:18:42,905 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:42" (1/1) ... [2024-10-31 22:18:42,907 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:42" (1/1) ... [2024-10-31 22:18:42,911 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:18:42,912 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:18:42,912 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:18:42,913 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:18:42,914 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:42" (1/1) ... [2024-10-31 22:18:42,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:18:42,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:18:42,949 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:18:42,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:18:42,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 22:18:42,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 22:18:42,988 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-31 22:18:42,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:18:42,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:18:42,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:18:42,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-31 22:18:42,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:18:42,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:18:42,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:18:42,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-31 22:18:42,990 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-31 22:18:42,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:18:42,990 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-31 22:18:42,990 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-31 22:18:42,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:18:42,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:18:42,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:18:42,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-31 22:18:42,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:18:42,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:18:42,994 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:18:43,188 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:18:43,193 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:18:43,874 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:18:43,875 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:18:44,556 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:18:44,556 INFO L316 CfgBuilder]: Removed 25 assume(true) statements. [2024-10-31 22:18:44,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:18:44 BoogieIcfgContainer [2024-10-31 22:18:44,559 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:18:44,562 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:18:44,565 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:18:44,568 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:18:44,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:18:41" (1/3) ... [2024-10-31 22:18:44,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10185161 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:18:44, skipping insertion in model container [2024-10-31 22:18:44,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:42" (2/3) ... [2024-10-31 22:18:44,570 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10185161 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:18:44, skipping insertion in model container [2024-10-31 22:18:44,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:18:44" (3/3) ... [2024-10-31 22:18:44,571 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2024-10-31 22:18:44,605 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:18:44,609 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2024-10-31 22:18:44,609 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:18:44,724 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-31 22:18:44,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 141 transitions, 289 flow [2024-10-31 22:18:44,873 INFO L124 PetriNetUnfolderBase]: 44/213 cut-off events. [2024-10-31 22:18:44,874 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-31 22:18:44,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 213 events. 44/213 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1021 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2024-10-31 22:18:44,884 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 141 transitions, 289 flow [2024-10-31 22:18:44,892 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 141 transitions, 289 flow [2024-10-31 22:18:44,908 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:18:44,921 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@3357f3d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:18:44,922 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-10-31 22:18:44,928 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:18:44,928 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-31 22:18:44,928 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:18:44,929 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:18:44,929 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-31 22:18:44,930 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:18:44,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:44,936 INFO L85 PathProgramCache]: Analyzing trace with hash 22359306, now seen corresponding path program 1 times [2024-10-31 22:18:44,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:44,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821413758] [2024-10-31 22:18:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:44,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:18:45,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:45,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821413758] [2024-10-31 22:18:45,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821413758] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:18:45,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:18:45,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:18:45,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248694933] [2024-10-31 22:18:45,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:18:45,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:18:45,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:45,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:18:45,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:18:45,459 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 141 [2024-10-31 22:18:45,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 141 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2024-10-31 22:18:45,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:18:45,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 141 [2024-10-31 22:18:45,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:18:46,222 INFO L124 PetriNetUnfolderBase]: 625/2072 cut-off events. [2024-10-31 22:18:46,222 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2024-10-31 22:18:46,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3265 conditions, 2072 events. 625/2072 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 15912 event pairs, 525 based on Foata normal form. 394/2156 useless extension candidates. Maximal degree in co-relation 3159. Up to 1187 conditions per place. [2024-10-31 22:18:46,246 INFO L140 encePairwiseOnDemand]: 114/141 looper letters, 53 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2024-10-31 22:18:46,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 116 transitions, 349 flow [2024-10-31 22:18:46,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:18:46,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:18:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2024-10-31 22:18:46,261 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6217494089834515 [2024-10-31 22:18:46,264 INFO L175 Difference]: Start difference. First operand has 114 places, 141 transitions, 289 flow. Second operand 3 states and 263 transitions. [2024-10-31 22:18:46,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 116 transitions, 349 flow [2024-10-31 22:18:46,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 116 transitions, 349 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:18:46,275 INFO L231 Difference]: Finished difference. Result has 115 places, 116 transitions, 249 flow [2024-10-31 22:18:46,278 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=115, PETRI_TRANSITIONS=116} [2024-10-31 22:18:46,283 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 1 predicate places. [2024-10-31 22:18:46,284 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 116 transitions, 249 flow [2024-10-31 22:18:46,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2024-10-31 22:18:46,285 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:18:46,285 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:18:46,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:18:46,286 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:18:46,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:46,287 INFO L85 PathProgramCache]: Analyzing trace with hash 693133463, now seen corresponding path program 1 times [2024-10-31 22:18:46,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:46,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155438015] [2024-10-31 22:18:46,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:46,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:18:46,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:46,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155438015] [2024-10-31 22:18:46,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155438015] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:18:46,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227594190] [2024-10-31 22:18:46,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:46,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:46,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:18:46,455 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:18:46,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:18:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:46,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 22:18:46,605 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:18:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:18:46,646 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:18:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:18:46,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227594190] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:18:46,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:18:46,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-31 22:18:46,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739087263] [2024-10-31 22:18:46,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:18:46,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:18:46,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:46,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:18:46,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:18:46,673 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 141 [2024-10-31 22:18:46,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 116 transitions, 249 flow. Second operand has 7 states, 7 states have (on average 62.285714285714285) internal successors, (436), 7 states have internal predecessors, (436), 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) [2024-10-31 22:18:46,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:18:46,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 141 [2024-10-31 22:18:46,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:18:47,242 INFO L124 PetriNetUnfolderBase]: 625/2075 cut-off events. [2024-10-31 22:18:47,242 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2024-10-31 22:18:47,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3281 conditions, 2075 events. 625/2075 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 15930 event pairs, 525 based on Foata normal form. 0/1765 useless extension candidates. Maximal degree in co-relation 3269. Up to 1187 conditions per place. [2024-10-31 22:18:47,260 INFO L140 encePairwiseOnDemand]: 138/141 looper letters, 53 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2024-10-31 22:18:47,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 119 transitions, 377 flow [2024-10-31 22:18:47,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:18:47,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:18:47,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 427 transitions. [2024-10-31 22:18:47,265 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5047281323877069 [2024-10-31 22:18:47,265 INFO L175 Difference]: Start difference. First operand has 115 places, 116 transitions, 249 flow. Second operand 6 states and 427 transitions. [2024-10-31 22:18:47,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 119 transitions, 377 flow [2024-10-31 22:18:47,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 119 transitions, 373 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-31 22:18:47,270 INFO L231 Difference]: Finished difference. Result has 122 places, 119 transitions, 281 flow [2024-10-31 22:18:47,271 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=281, PETRI_PLACES=122, PETRI_TRANSITIONS=119} [2024-10-31 22:18:47,272 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 8 predicate places. [2024-10-31 22:18:47,272 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 119 transitions, 281 flow [2024-10-31 22:18:47,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 62.285714285714285) internal successors, (436), 7 states have internal predecessors, (436), 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) [2024-10-31 22:18:47,273 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:18:47,273 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-31 22:18:47,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:18:47,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:47,476 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:18:47,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:47,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1068781557, now seen corresponding path program 2 times [2024-10-31 22:18:47,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:47,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512939935] [2024-10-31 22:18:47,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:47,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:18:47,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:47,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512939935] [2024-10-31 22:18:47,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512939935] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:18:47,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000438356] [2024-10-31 22:18:47,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:18:47,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:47,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:18:47,738 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:18:47,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:18:47,862 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 22:18:47,862 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:18:47,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:18:47,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:18:47,913 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 [2024-10-31 22:18:47,947 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 22:18:47,948 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:18:47,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000438356] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:18:47,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:18:47,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2024-10-31 22:18:47,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102371006] [2024-10-31 22:18:47,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:18:47,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:18:47,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:47,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:18:47,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:18:47,997 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 141 [2024-10-31 22:18:47,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 119 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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) [2024-10-31 22:18:47,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:18:47,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 141 [2024-10-31 22:18:47,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:18:48,447 INFO L124 PetriNetUnfolderBase]: 619/1982 cut-off events. [2024-10-31 22:18:48,447 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-31 22:18:48,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3212 conditions, 1982 events. 619/1982 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 15582 event pairs, 0 based on Foata normal form. 1/1672 useless extension candidates. Maximal degree in co-relation 3178. Up to 1177 conditions per place. [2024-10-31 22:18:48,463 INFO L140 encePairwiseOnDemand]: 137/141 looper letters, 80 selfloop transitions, 2 changer transitions 0/142 dead transitions. [2024-10-31 22:18:48,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 142 transitions, 491 flow [2024-10-31 22:18:48,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:18:48,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:18:48,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2024-10-31 22:18:48,465 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6146572104018913 [2024-10-31 22:18:48,465 INFO L175 Difference]: Start difference. First operand has 122 places, 119 transitions, 281 flow. Second operand 3 states and 260 transitions. [2024-10-31 22:18:48,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 142 transitions, 491 flow [2024-10-31 22:18:48,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 142 transitions, 477 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-31 22:18:48,472 INFO L231 Difference]: Finished difference. Result has 124 places, 119 transitions, 277 flow [2024-10-31 22:18:48,472 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=277, PETRI_PLACES=124, PETRI_TRANSITIONS=119} [2024-10-31 22:18:48,473 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 10 predicate places. [2024-10-31 22:18:48,473 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 119 transitions, 277 flow [2024-10-31 22:18:48,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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) [2024-10-31 22:18:48,474 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:18:48,474 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-31 22:18:48,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:18:48,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:48,682 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:18:48,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:48,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1068781558, now seen corresponding path program 1 times [2024-10-31 22:18:48,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:48,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199556438] [2024-10-31 22:18:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:48,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 22:18:48,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:48,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199556438] [2024-10-31 22:18:48,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199556438] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:18:48,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:18:48,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:18:48,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307853710] [2024-10-31 22:18:48,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:18:48,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:18:48,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:48,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:18:48,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:18:48,902 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 141 [2024-10-31 22:18:48,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 119 transitions, 277 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2024-10-31 22:18:48,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:18:48,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 141 [2024-10-31 22:18:48,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:18:49,363 INFO L124 PetriNetUnfolderBase]: 666/2129 cut-off events. [2024-10-31 22:18:49,363 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-10-31 22:18:49,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3479 conditions, 2129 events. 666/2129 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 16498 event pairs, 525 based on Foata normal form. 0/1858 useless extension candidates. Maximal degree in co-relation 3450. Up to 1161 conditions per place. [2024-10-31 22:18:49,378 INFO L140 encePairwiseOnDemand]: 137/141 looper letters, 80 selfloop transitions, 2 changer transitions 0/139 dead transitions. [2024-10-31 22:18:49,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 139 transitions, 481 flow [2024-10-31 22:18:49,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:18:49,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:18:49,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2024-10-31 22:18:49,380 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5933806146572104 [2024-10-31 22:18:49,380 INFO L175 Difference]: Start difference. First operand has 124 places, 119 transitions, 277 flow. Second operand 3 states and 251 transitions. [2024-10-31 22:18:49,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 139 transitions, 481 flow [2024-10-31 22:18:49,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 139 transitions, 477 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:18:49,384 INFO L231 Difference]: Finished difference. Result has 122 places, 117 transitions, 273 flow [2024-10-31 22:18:49,385 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=122, PETRI_TRANSITIONS=117} [2024-10-31 22:18:49,386 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 8 predicate places. [2024-10-31 22:18:49,386 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 117 transitions, 273 flow [2024-10-31 22:18:49,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2024-10-31 22:18:49,386 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:18:49,387 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2024-10-31 22:18:49,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:18:49,387 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:18:49,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:49,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1426733069, now seen corresponding path program 1 times [2024-10-31 22:18:49,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:49,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304768165] [2024-10-31 22:18:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:49,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:18:49,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:49,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304768165] [2024-10-31 22:18:49,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304768165] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:18:49,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658415313] [2024-10-31 22:18:49,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:49,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:49,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:18:49,555 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:18:49,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:18:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:49,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:18:49,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:18:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:18:49,723 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:18:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:18:49,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658415313] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:18:49,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:18:49,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-31 22:18:49,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955665045] [2024-10-31 22:18:49,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:18:49,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:18:49,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:49,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:18:49,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:18:49,851 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 141 [2024-10-31 22:18:49,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 117 transitions, 273 flow. Second operand has 13 states, 13 states have (on average 62.30769230769231) internal successors, (810), 13 states have internal predecessors, (810), 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) [2024-10-31 22:18:49,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:18:49,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 141 [2024-10-31 22:18:49,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:18:50,428 INFO L124 PetriNetUnfolderBase]: 622/2038 cut-off events. [2024-10-31 22:18:50,429 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-10-31 22:18:50,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3317 conditions, 2038 events. 622/2038 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 15532 event pairs, 525 based on Foata normal form. 6/1772 useless extension candidates. Maximal degree in co-relation 3264. Up to 1164 conditions per place. [2024-10-31 22:18:50,444 INFO L140 encePairwiseOnDemand]: 138/141 looper letters, 53 selfloop transitions, 11 changer transitions 0/123 dead transitions. [2024-10-31 22:18:50,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 123 transitions, 437 flow [2024-10-31 22:18:50,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 22:18:50,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-31 22:18:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 802 transitions. [2024-10-31 22:18:50,448 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4739952718676123 [2024-10-31 22:18:50,448 INFO L175 Difference]: Start difference. First operand has 122 places, 117 transitions, 273 flow. Second operand 12 states and 802 transitions. [2024-10-31 22:18:50,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 123 transitions, 437 flow [2024-10-31 22:18:50,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 123 transitions, 433 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:18:50,455 INFO L231 Difference]: Finished difference. Result has 137 places, 123 transitions, 353 flow [2024-10-31 22:18:50,456 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=353, PETRI_PLACES=137, PETRI_TRANSITIONS=123} [2024-10-31 22:18:50,457 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 23 predicate places. [2024-10-31 22:18:50,458 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 123 transitions, 353 flow [2024-10-31 22:18:50,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 62.30769230769231) internal successors, (810), 13 states have internal predecessors, (810), 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) [2024-10-31 22:18:50,459 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:18:50,459 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2024-10-31 22:18:50,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 22:18:50,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:50,661 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:18:50,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:50,661 INFO L85 PathProgramCache]: Analyzing trace with hash -258610035, now seen corresponding path program 2 times [2024-10-31 22:18:50,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:50,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440775766] [2024-10-31 22:18:50,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:50,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-31 22:18:50,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:50,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440775766] [2024-10-31 22:18:50,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440775766] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:18:50,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904677096] [2024-10-31 22:18:50,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:18:50,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:50,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:18:50,939 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:18:50,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:18:51,064 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:18:51,065 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:18:51,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:18:51,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:18:51,092 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 [2024-10-31 22:18:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-31 22:18:51,194 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:18:51,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904677096] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:18:51,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:18:51,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2024-10-31 22:18:51,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750857183] [2024-10-31 22:18:51,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:18:51,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:18:51,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:51,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:18:51,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:18:51,287 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 141 [2024-10-31 22:18:51,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 123 transitions, 353 flow. Second operand has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 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) [2024-10-31 22:18:51,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:18:51,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 141 [2024-10-31 22:18:51,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:18:51,859 INFO L124 PetriNetUnfolderBase]: 598/1923 cut-off events. [2024-10-31 22:18:51,859 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-10-31 22:18:51,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3196 conditions, 1923 events. 598/1923 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 14970 event pairs, 0 based on Foata normal form. 22/1700 useless extension candidates. Maximal degree in co-relation 3119. Up to 1051 conditions per place. [2024-10-31 22:18:51,875 INFO L140 encePairwiseOnDemand]: 136/141 looper letters, 127 selfloop transitions, 4 changer transitions 0/189 dead transitions. [2024-10-31 22:18:51,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 189 transitions, 745 flow [2024-10-31 22:18:51,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:18:51,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:18:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 422 transitions. [2024-10-31 22:18:51,878 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5985815602836879 [2024-10-31 22:18:51,878 INFO L175 Difference]: Start difference. First operand has 137 places, 123 transitions, 353 flow. Second operand 5 states and 422 transitions. [2024-10-31 22:18:51,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 189 transitions, 745 flow [2024-10-31 22:18:51,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 189 transitions, 697 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-10-31 22:18:51,884 INFO L231 Difference]: Finished difference. Result has 136 places, 123 transitions, 316 flow [2024-10-31 22:18:51,884 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=316, PETRI_PLACES=136, PETRI_TRANSITIONS=123} [2024-10-31 22:18:51,885 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 22 predicate places. [2024-10-31 22:18:51,885 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 123 transitions, 316 flow [2024-10-31 22:18:51,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 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) [2024-10-31 22:18:51,886 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:18:51,886 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2024-10-31 22:18:51,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-31 22:18:52,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:18:52,091 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:18:52,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:52,094 INFO L85 PathProgramCache]: Analyzing trace with hash 573024315, now seen corresponding path program 1 times [2024-10-31 22:18:52,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:52,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381495403] [2024-10-31 22:18:52,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:52,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:18:52,130 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 22:18:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:18:52,185 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-31 22:18:52,185 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-31 22:18:52,186 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2024-10-31 22:18:52,188 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2024-10-31 22:18:52,189 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2024-10-31 22:18:52,189 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2024-10-31 22:18:52,189 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2024-10-31 22:18:52,190 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (33 of 39 remaining) [2024-10-31 22:18:52,190 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2024-10-31 22:18:52,190 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2024-10-31 22:18:52,190 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2024-10-31 22:18:52,191 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2024-10-31 22:18:52,191 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2024-10-31 22:18:52,191 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2024-10-31 22:18:52,191 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2024-10-31 22:18:52,192 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2024-10-31 22:18:52,192 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2024-10-31 22:18:52,192 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2024-10-31 22:18:52,193 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2024-10-31 22:18:52,193 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2024-10-31 22:18:52,193 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2024-10-31 22:18:52,193 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2024-10-31 22:18:52,194 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2024-10-31 22:18:52,194 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2024-10-31 22:18:52,194 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2024-10-31 22:18:52,194 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2024-10-31 22:18:52,195 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2024-10-31 22:18:52,195 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2024-10-31 22:18:52,195 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2024-10-31 22:18:52,195 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2024-10-31 22:18:52,196 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2024-10-31 22:18:52,196 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2024-10-31 22:18:52,196 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2024-10-31 22:18:52,196 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2024-10-31 22:18:52,197 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2024-10-31 22:18:52,197 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2024-10-31 22:18:52,197 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2024-10-31 22:18:52,197 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2024-10-31 22:18:52,198 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2024-10-31 22:18:52,198 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2024-10-31 22:18:52,198 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2024-10-31 22:18:52,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:18:52,199 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-10-31 22:18:52,201 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-31 22:18:52,202 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-31 22:18:52,250 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:18:52,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 204 transitions, 424 flow [2024-10-31 22:18:52,302 INFO L124 PetriNetUnfolderBase]: 74/360 cut-off events. [2024-10-31 22:18:52,302 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-31 22:18:52,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 360 events. 74/360 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2070 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 215. Up to 12 conditions per place. [2024-10-31 22:18:52,306 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 204 transitions, 424 flow [2024-10-31 22:18:52,312 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 204 transitions, 424 flow [2024-10-31 22:18:52,315 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:18:52,316 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@3357f3d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:18:52,317 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-10-31 22:18:52,319 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:18:52,323 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-31 22:18:52,323 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:18:52,323 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:18:52,323 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-31 22:18:52,323 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-31 22:18:52,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:52,326 INFO L85 PathProgramCache]: Analyzing trace with hash 28639242, now seen corresponding path program 1 times [2024-10-31 22:18:52,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:52,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859741521] [2024-10-31 22:18:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:52,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:18:52,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:52,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859741521] [2024-10-31 22:18:52,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859741521] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:18:52,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:18:52,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:18:52,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392781206] [2024-10-31 22:18:52,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:18:52,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:18:52,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:52,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:18:52,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:18:52,385 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 204 [2024-10-31 22:18:52,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 204 transitions, 424 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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) [2024-10-31 22:18:52,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:18:52,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 204 [2024-10-31 22:18:52,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:19:00,215 INFO L124 PetriNetUnfolderBase]: 27581/60837 cut-off events. [2024-10-31 22:19:00,215 INFO L125 PetriNetUnfolderBase]: For 195/200 co-relation queries the response was YES. [2024-10-31 22:19:00,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100897 conditions, 60837 events. 27581/60837 cut-off events. For 195/200 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 679650 event pairs, 24192 based on Foata normal form. 13675/66308 useless extension candidates. Maximal degree in co-relation 93084. Up to 39942 conditions per place. [2024-10-31 22:19:00,833 INFO L140 encePairwiseOnDemand]: 165/204 looper letters, 77 selfloop transitions, 2 changer transitions 0/166 dead transitions. [2024-10-31 22:19:00,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 166 transitions, 506 flow [2024-10-31 22:19:00,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:19:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:19:00,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2024-10-31 22:19:00,836 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6160130718954249 [2024-10-31 22:19:00,836 INFO L175 Difference]: Start difference. First operand has 164 places, 204 transitions, 424 flow. Second operand 3 states and 377 transitions. [2024-10-31 22:19:00,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 166 transitions, 506 flow [2024-10-31 22:19:00,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 166 transitions, 506 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:19:00,842 INFO L231 Difference]: Finished difference. Result has 164 places, 166 transitions, 358 flow [2024-10-31 22:19:00,843 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=358, PETRI_PLACES=164, PETRI_TRANSITIONS=166} [2024-10-31 22:19:00,845 INFO L277 CegarLoopForPetriNet]: 164 programPoint places, 0 predicate places. [2024-10-31 22:19:00,845 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 166 transitions, 358 flow [2024-10-31 22:19:00,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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) [2024-10-31 22:19:00,846 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:19:00,847 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:19:00,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:19:00,847 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-31 22:19:00,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:00,848 INFO L85 PathProgramCache]: Analyzing trace with hash 887811682, now seen corresponding path program 1 times [2024-10-31 22:19:00,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:00,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262439412] [2024-10-31 22:19:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:00,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:00,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:00,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262439412] [2024-10-31 22:19:00,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262439412] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:00,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102870473] [2024-10-31 22:19:00,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:00,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:00,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:00,933 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:00,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:19:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:01,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 22:19:01,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:01,071 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:01,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102870473] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:01,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:01,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-31 22:19:01,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679716466] [2024-10-31 22:19:01,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:01,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:19:01,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:01,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:19:01,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:19:01,097 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 204 [2024-10-31 22:19:01,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 166 transitions, 358 flow. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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) [2024-10-31 22:19:01,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:19:01,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 204 [2024-10-31 22:19:01,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:19:07,725 INFO L124 PetriNetUnfolderBase]: 27581/60840 cut-off events. [2024-10-31 22:19:07,725 INFO L125 PetriNetUnfolderBase]: For 200/205 co-relation queries the response was YES. [2024-10-31 22:19:07,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100913 conditions, 60840 events. 27581/60840 cut-off events. For 200/205 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 679806 event pairs, 24192 based on Foata normal form. 0/52636 useless extension candidates. Maximal degree in co-relation 100900. Up to 39942 conditions per place. [2024-10-31 22:19:08,227 INFO L140 encePairwiseOnDemand]: 201/204 looper letters, 77 selfloop transitions, 5 changer transitions 0/169 dead transitions. [2024-10-31 22:19:08,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 169 transitions, 534 flow [2024-10-31 22:19:08,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:19:08,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:19:08,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 607 transitions. [2024-10-31 22:19:08,231 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4959150326797386 [2024-10-31 22:19:08,231 INFO L175 Difference]: Start difference. First operand has 164 places, 166 transitions, 358 flow. Second operand 6 states and 607 transitions. [2024-10-31 22:19:08,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 169 transitions, 534 flow [2024-10-31 22:19:08,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 169 transitions, 530 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-31 22:19:08,238 INFO L231 Difference]: Finished difference. Result has 171 places, 169 transitions, 390 flow [2024-10-31 22:19:08,238 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=390, PETRI_PLACES=171, PETRI_TRANSITIONS=169} [2024-10-31 22:19:08,239 INFO L277 CegarLoopForPetriNet]: 164 programPoint places, 7 predicate places. [2024-10-31 22:19:08,239 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 169 transitions, 390 flow [2024-10-31 22:19:08,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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) [2024-10-31 22:19:08,240 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:19:08,241 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-31 22:19:08,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:19:08,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f4c13b1-75bc-49f6-919c-e176bbd18e55/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-31 22:19:08,442 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-31 22:19:08,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:08,443 INFO L85 PathProgramCache]: Analyzing trace with hash 384423434, now seen corresponding path program 2 times [2024-10-31 22:19:08,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:08,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893198320] [2024-10-31 22:19:08,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:08,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 22:19:08,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:08,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893198320] [2024-10-31 22:19:08,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893198320] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:19:08,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:19:08,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:19:08,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228566248] [2024-10-31 22:19:08,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:19:08,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:19:08,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:08,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:19:08,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:19:08,572 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 204 [2024-10-31 22:19:08,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 169 transitions, 390 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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) [2024-10-31 22:19:08,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:19:08,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 204 [2024-10-31 22:19:08,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand