./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd --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 b3e7d0a2f10d1449a9a354d4032bafdd0ae7a7fd76aceb835acbee3134ec74e4 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 14:01:14,673 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 14:01:14,757 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 14:01:14,762 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 14:01:14,763 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 14:01:14,791 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 14:01:14,795 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 14:01:14,795 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 14:01:14,795 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 14:01:14,795 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 14:01:14,796 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 14:01:14,796 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 14:01:14,796 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 14:01:14,796 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 14:01:14,796 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 14:01:14,797 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 14:01:14,797 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 14:01:14,797 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 14:01:14,797 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 14:01:14,797 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 14:01:14,797 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 14:01:14,800 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 14:01:14,800 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 14:01:14,800 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 14:01:14,800 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 14:01:14,800 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 14:01:14,801 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 14:01:14,801 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 14:01:14,801 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 14:01:14,801 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 14:01:14,801 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 14:01:14,801 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 14:01:14,801 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 14:01:14,801 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:01:14,801 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 14:01:14,802 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 14:01:14,802 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 14:01:14,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 14:01:14,802 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 14:01:14,802 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 14:01:14,802 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 14:01:14,802 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 14:01:14,802 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd 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 -> b3e7d0a2f10d1449a9a354d4032bafdd0ae7a7fd76aceb835acbee3134ec74e4 [2024-11-13 14:01:15,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 14:01:15,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 14:01:15,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 14:01:15,199 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 14:01:15,200 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 14:01:15,202 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i Unable to find full path for "g++" [2024-11-13 14:01:17,264 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 14:01:17,573 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 14:01:17,576 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i [2024-11-13 14:01:17,591 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/data/3c53efd25/2554a5d6a3724bd0899a86005b43edeb/FLAG78c89348f [2024-11-13 14:01:17,606 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/data/3c53efd25/2554a5d6a3724bd0899a86005b43edeb [2024-11-13 14:01:17,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 14:01:17,613 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 14:01:17,614 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 14:01:17,614 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 14:01:17,619 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 14:01:17,620 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:01:17" (1/1) ... [2024-11-13 14:01:17,621 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68a4becb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:01:17, skipping insertion in model container [2024-11-13 14:01:17,621 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:01:17" (1/1) ... [2024-11-13 14:01:17,665 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 14:01:18,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:01:18,055 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 14:01:18,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:01:18,161 INFO L204 MainTranslator]: Completed translation [2024-11-13 14:01:18,162 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:01:18 WrapperNode [2024-11-13 14:01:18,162 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 14:01:18,163 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 14:01:18,163 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 14:01:18,164 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 14:01:18,172 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:01:18" (1/1) ... [2024-11-13 14:01:18,187 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:01:18" (1/1) ... [2024-11-13 14:01:18,213 INFO L138 Inliner]: procedures = 174, calls = 42, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 139 [2024-11-13 14:01:18,213 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 14:01:18,214 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 14:01:18,214 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 14:01:18,214 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 14:01:18,224 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:01:18" (1/1) ... [2024-11-13 14:01:18,224 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:01:18" (1/1) ... [2024-11-13 14:01:18,228 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:01:18" (1/1) ... [2024-11-13 14:01:18,244 INFO L175 MemorySlicer]: Split 20 memory accesses to 4 slices as follows [2, 2, 8, 8]. 40 percent of accesses are in the largest equivalence class. The 18 initializations are split as follows [2, 0, 8, 8]. The 1 writes are split as follows [0, 1, 0, 0]. [2024-11-13 14:01:18,245 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:01:18" (1/1) ... [2024-11-13 14:01:18,245 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:01:18" (1/1) ... [2024-11-13 14:01:18,256 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:01:18" (1/1) ... [2024-11-13 14:01:18,261 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:01:18" (1/1) ... [2024-11-13 14:01:18,264 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:01:18" (1/1) ... [2024-11-13 14:01:18,265 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:01:18" (1/1) ... [2024-11-13 14:01:18,269 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 14:01:18,270 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 14:01:18,270 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 14:01:18,270 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 14:01:18,271 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:01:18" (1/1) ... [2024-11-13 14:01:18,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:01:18,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:01:18,320 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 14:01:18,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 14:01:18,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 14:01:18,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 14:01:18,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-13 14:01:18,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-13 14:01:18,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 14:01:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 14:01:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-13 14:01:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-13 14:01:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-13 14:01:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 14:01:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 14:01:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-13 14:01:18,361 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-13 14:01:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 14:01:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-13 14:01:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-13 14:01:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-13 14:01:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-13 14:01:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 14:01:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 14:01:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-13 14:01:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-13 14:01:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-13 14:01:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 14:01:18,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 14:01:18,365 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 14:01:18,552 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 14:01:18,554 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 14:01:18,989 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 14:01:18,990 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 14:01:19,661 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 14:01:19,661 INFO L316 CfgBuilder]: Removed 10 assume(true) statements. [2024-11-13 14:01:19,661 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:01:19 BoogieIcfgContainer [2024-11-13 14:01:19,662 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 14:01:19,666 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 14:01:19,666 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 14:01:19,670 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 14:01:19,671 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:01:17" (1/3) ... [2024-11-13 14:01:19,671 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33854af1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:01:19, skipping insertion in model container [2024-11-13 14:01:19,671 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:01:18" (2/3) ... [2024-11-13 14:01:19,672 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33854af1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:01:19, skipping insertion in model container [2024-11-13 14:01:19,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:01:19" (3/3) ... [2024-11-13 14:01:19,673 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_02-simple_racefree.i [2024-11-13 14:01:19,689 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 14:01:19,691 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_02-simple_racefree.i that has 2 procedures, 49 locations, 1 initial locations, 6 loop locations, and 6 error locations. [2024-11-13 14:01:19,691 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 14:01:19,758 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-13 14:01:19,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 60 transitions, 127 flow [2024-11-13 14:01:19,866 INFO L124 PetriNetUnfolderBase]: 15/91 cut-off events. [2024-11-13 14:01:19,869 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-13 14:01:19,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 91 events. 15/91 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 345 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2024-11-13 14:01:19,875 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 60 transitions, 127 flow [2024-11-13 14:01:19,882 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 60 transitions, 127 flow [2024-11-13 14:01:19,894 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 14:01:19,930 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;@5ce4ba53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 14:01:19,930 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-13 14:01:19,946 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 14:01:19,946 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-13 14:01:19,946 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 14:01:19,946 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:19,947 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 14:01:19,948 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 14:01:19,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:19,953 INFO L85 PathProgramCache]: Analyzing trace with hash 461334, now seen corresponding path program 1 times [2024-11-13 14:01:19,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:19,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102310545] [2024-11-13 14:01:19,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:19,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:20,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:20,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102310545] [2024-11-13 14:01:20,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102310545] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:01:20,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:01:20,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 14:01:20,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163770365] [2024-11-13 14:01:20,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:01:20,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:01:20,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:20,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:01:20,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:01:20,493 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-11-13 14:01:20,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 60 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2024-11-13 14:01:20,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:20,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-11-13 14:01:20,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:20,788 INFO L124 PetriNetUnfolderBase]: 136/437 cut-off events. [2024-11-13 14:01:20,788 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-13 14:01:20,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 437 events. 136/437 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2199 event pairs, 117 based on Foata normal form. 94/512 useless extension candidates. Maximal degree in co-relation 700. Up to 272 conditions per place. [2024-11-13 14:01:20,796 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 34 selfloop transitions, 2 changer transitions 1/56 dead transitions. [2024-11-13 14:01:20,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 56 transitions, 193 flow [2024-11-13 14:01:20,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:01:20,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 14:01:20,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2024-11-13 14:01:20,819 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-11-13 14:01:20,821 INFO L175 Difference]: Start difference. First operand has 52 places, 60 transitions, 127 flow. Second operand 3 states and 112 transitions. [2024-11-13 14:01:20,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 56 transitions, 193 flow [2024-11-13 14:01:20,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 56 transitions, 193 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-13 14:01:20,839 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 103 flow [2024-11-13 14:01:20,842 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-11-13 14:01:20,847 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2024-11-13 14:01:20,847 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 103 flow [2024-11-13 14:01:20,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2024-11-13 14:01:20,848 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:20,848 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 14:01:20,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 14:01:20,849 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 14:01:20,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:20,851 INFO L85 PathProgramCache]: Analyzing trace with hash 461335, now seen corresponding path program 1 times [2024-11-13 14:01:20,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:20,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631939827] [2024-11-13 14:01:20,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:20,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:21,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:21,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631939827] [2024-11-13 14:01:21,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631939827] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:01:21,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:01:21,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 14:01:21,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552420012] [2024-11-13 14:01:21,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:01:21,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:01:21,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:21,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:01:21,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:01:21,239 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-11-13 14:01:21,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2024-11-13 14:01:21,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:21,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-11-13 14:01:21,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:21,433 INFO L124 PetriNetUnfolderBase]: 117/395 cut-off events. [2024-11-13 14:01:21,433 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-13 14:01:21,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 676 conditions, 395 events. 117/395 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2113 event pairs, 0 based on Foata normal form. 1/367 useless extension candidates. Maximal degree in co-relation 640. Up to 251 conditions per place. [2024-11-13 14:01:21,440 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 34 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2024-11-13 14:01:21,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 195 flow [2024-11-13 14:01:21,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:01:21,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 14:01:21,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-11-13 14:01:21,443 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-11-13 14:01:21,443 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 103 flow. Second operand 3 states and 104 transitions. [2024-11-13 14:01:21,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 195 flow [2024-11-13 14:01:21,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 191 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 14:01:21,450 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 109 flow [2024-11-13 14:01:21,451 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-11-13 14:01:21,452 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2024-11-13 14:01:21,453 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 109 flow [2024-11-13 14:01:21,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2024-11-13 14:01:21,454 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:21,454 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-13 14:01:21,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 14:01:21,454 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 14:01:21,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:21,455 INFO L85 PathProgramCache]: Analyzing trace with hash 863695867, now seen corresponding path program 1 times [2024-11-13 14:01:21,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:21,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978834167] [2024-11-13 14:01:21,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:21,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:21,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:21,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978834167] [2024-11-13 14:01:21,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978834167] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:01:21,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300844187] [2024-11-13 14:01:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:21,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:21,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:01:21,770 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:01:21,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 14:01:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:21,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 14:01:21,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:01:22,058 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 [2024-11-13 14:01:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:22,166 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:01:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:22,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300844187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:01:22,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:01:22,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-11-13 14:01:22,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901063273] [2024-11-13 14:01:22,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:01:22,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 14:01:22,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:22,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 14:01:22,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:01:22,377 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-13 14:01:22,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 109 flow. Second operand has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 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) [2024-11-13 14:01:22,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:22,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-13 14:01:22,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:22,513 INFO L124 PetriNetUnfolderBase]: 27/88 cut-off events. [2024-11-13 14:01:22,513 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-13 14:01:22,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 88 events. 27/88 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 232 event pairs, 0 based on Foata normal form. 20/104 useless extension candidates. Maximal degree in co-relation 160. Up to 57 conditions per place. [2024-11-13 14:01:22,517 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 23 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-11-13 14:01:22,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 128 flow [2024-11-13 14:01:22,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:01:22,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:01:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-11-13 14:01:22,521 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-11-13 14:01:22,522 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 109 flow. Second operand 4 states and 111 transitions. [2024-11-13 14:01:22,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 128 flow [2024-11-13 14:01:22,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 34 transitions, 122 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 14:01:22,525 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 54 flow [2024-11-13 14:01:22,527 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2024-11-13 14:01:22,528 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -23 predicate places. [2024-11-13 14:01:22,528 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 54 flow [2024-11-13 14:01:22,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 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) [2024-11-13 14:01:22,530 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:22,530 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-13 14:01:22,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-13 14:01:22,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:22,731 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 14:01:22,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:22,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1004768519, now seen corresponding path program 1 times [2024-11-13 14:01:22,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:22,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014163637] [2024-11-13 14:01:22,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:22,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 14:01:22,800 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 14:01:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 14:01:22,845 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-13 14:01:22,845 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-13 14:01:22,847 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-13 14:01:22,849 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-13 14:01:22,849 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-13 14:01:22,849 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2024-11-13 14:01:22,849 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-13 14:01:22,850 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2024-11-13 14:01:22,850 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-13 14:01:22,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 14:01:22,850 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-13 14:01:22,853 WARN L247 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-13 14:01:22,854 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-13 14:01:22,885 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-13 14:01:22,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 85 transitions, 186 flow [2024-11-13 14:01:22,911 INFO L124 PetriNetUnfolderBase]: 27/159 cut-off events. [2024-11-13 14:01:22,911 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-13 14:01:22,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 159 events. 27/159 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 679 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 95. Up to 6 conditions per place. [2024-11-13 14:01:22,913 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 85 transitions, 186 flow [2024-11-13 14:01:22,915 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 85 transitions, 186 flow [2024-11-13 14:01:22,916 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 14:01:22,917 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;@5ce4ba53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 14:01:22,917 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-13 14:01:22,920 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 14:01:22,920 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-13 14:01:22,920 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 14:01:22,920 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:22,921 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 14:01:22,921 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 14:01:22,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:22,921 INFO L85 PathProgramCache]: Analyzing trace with hash 545739, now seen corresponding path program 1 times [2024-11-13 14:01:22,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:22,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445559233] [2024-11-13 14:01:22,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:22,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:23,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:23,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445559233] [2024-11-13 14:01:23,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445559233] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:01:23,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:01:23,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 14:01:23,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021303715] [2024-11-13 14:01:23,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:01:23,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:01:23,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:23,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:01:23,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:01:23,031 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 85 [2024-11-13 14:01:23,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 85 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2024-11-13 14:01:23,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:23,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 85 [2024-11-13 14:01:23,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:24,000 INFO L124 PetriNetUnfolderBase]: 2991/6066 cut-off events. [2024-11-13 14:01:24,001 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-11-13 14:01:24,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10951 conditions, 6066 events. 2991/6066 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 45949 event pairs, 2583 based on Foata normal form. 1632/7435 useless extension candidates. Maximal degree in co-relation 8032. Up to 4189 conditions per place. [2024-11-13 14:01:24,042 INFO L140 encePairwiseOnDemand]: 65/85 looper letters, 54 selfloop transitions, 2 changer transitions 1/84 dead transitions. [2024-11-13 14:01:24,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 84 transitions, 298 flow [2024-11-13 14:01:24,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:01:24,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 14:01:24,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2024-11-13 14:01:24,047 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6588235294117647 [2024-11-13 14:01:24,047 INFO L175 Difference]: Start difference. First operand has 72 places, 85 transitions, 186 flow. Second operand 3 states and 168 transitions. [2024-11-13 14:01:24,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 84 transitions, 298 flow [2024-11-13 14:01:24,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 84 transitions, 298 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-13 14:01:24,051 INFO L231 Difference]: Finished difference. Result has 71 places, 65 transitions, 150 flow [2024-11-13 14:01:24,051 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=71, PETRI_TRANSITIONS=65} [2024-11-13 14:01:24,055 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2024-11-13 14:01:24,056 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 65 transitions, 150 flow [2024-11-13 14:01:24,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2024-11-13 14:01:24,056 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:24,056 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 14:01:24,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 14:01:24,056 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 14:01:24,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:24,057 INFO L85 PathProgramCache]: Analyzing trace with hash 545740, now seen corresponding path program 1 times [2024-11-13 14:01:24,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:24,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102430647] [2024-11-13 14:01:24,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:24,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:24,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:24,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102430647] [2024-11-13 14:01:24,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102430647] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:01:24,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:01:24,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 14:01:24,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552568413] [2024-11-13 14:01:24,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:01:24,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:01:24,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:24,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:01:24,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:01:24,228 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 85 [2024-11-13 14:01:24,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 65 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2024-11-13 14:01:24,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:24,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 85 [2024-11-13 14:01:24,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:25,098 INFO L124 PetriNetUnfolderBase]: 2594/5471 cut-off events. [2024-11-13 14:01:25,099 INFO L125 PetriNetUnfolderBase]: For 135/143 co-relation queries the response was YES. [2024-11-13 14:01:25,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9831 conditions, 5471 events. 2594/5471 cut-off events. For 135/143 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 41717 event pairs, 2574 based on Foata normal form. 1/5163 useless extension candidates. Maximal degree in co-relation 9025. Up to 4168 conditions per place. [2024-11-13 14:01:25,142 INFO L140 encePairwiseOnDemand]: 81/85 looper letters, 46 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2024-11-13 14:01:25,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 76 transitions, 268 flow [2024-11-13 14:01:25,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:01:25,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 14:01:25,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2024-11-13 14:01:25,144 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2024-11-13 14:01:25,145 INFO L175 Difference]: Start difference. First operand has 71 places, 65 transitions, 150 flow. Second operand 3 states and 140 transitions. [2024-11-13 14:01:25,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 76 transitions, 268 flow [2024-11-13 14:01:25,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 76 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 14:01:25,157 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 160 flow [2024-11-13 14:01:25,158 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2024-11-13 14:01:25,160 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2024-11-13 14:01:25,161 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 160 flow [2024-11-13 14:01:25,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2024-11-13 14:01:25,162 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:25,162 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-13 14:01:25,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 14:01:25,162 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 14:01:25,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:25,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1507376377, now seen corresponding path program 1 times [2024-11-13 14:01:25,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:25,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027730325] [2024-11-13 14:01:25,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:25,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:25,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:25,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:25,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027730325] [2024-11-13 14:01:25,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027730325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:01:25,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932870674] [2024-11-13 14:01:25,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:25,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:25,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:01:25,417 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:01:25,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 14:01:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:25,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 14:01:25,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:01:25,625 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 [2024-11-13 14:01:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:25,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:01:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:25,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932870674] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:01:25,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:01:25,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-13 14:01:25,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831691518] [2024-11-13 14:01:25,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:01:25,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 14:01:25,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:25,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 14:01:25,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-13 14:01:25,911 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 85 [2024-11-13 14:01:25,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 160 flow. Second operand has 9 states, 9 states have (on average 31.333333333333332) internal successors, (282), 9 states have internal predecessors, (282), 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) [2024-11-13 14:01:25,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:25,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 85 [2024-11-13 14:01:25,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:26,244 INFO L124 PetriNetUnfolderBase]: 657/1415 cut-off events. [2024-11-13 14:01:26,244 INFO L125 PetriNetUnfolderBase]: For 355/355 co-relation queries the response was YES. [2024-11-13 14:01:26,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2674 conditions, 1415 events. 657/1415 cut-off events. For 355/355 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 8217 event pairs, 276 based on Foata normal form. 220/1612 useless extension candidates. Maximal degree in co-relation 2326. Up to 840 conditions per place. [2024-11-13 14:01:26,252 INFO L140 encePairwiseOnDemand]: 81/85 looper letters, 53 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2024-11-13 14:01:26,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 73 transitions, 276 flow [2024-11-13 14:01:26,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:01:26,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:01:26,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 205 transitions. [2024-11-13 14:01:26,254 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4823529411764706 [2024-11-13 14:01:26,254 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 160 flow. Second operand 5 states and 205 transitions. [2024-11-13 14:01:26,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 73 transitions, 276 flow [2024-11-13 14:01:26,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 73 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 14:01:26,256 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 106 flow [2024-11-13 14:01:26,256 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2024-11-13 14:01:26,257 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -20 predicate places. [2024-11-13 14:01:26,257 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 106 flow [2024-11-13 14:01:26,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 31.333333333333332) internal successors, (282), 9 states have internal predecessors, (282), 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) [2024-11-13 14:01:26,258 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:26,258 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-13 14:01:26,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 14:01:26,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-13 14:01:26,462 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 14:01:26,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:26,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1558165847, now seen corresponding path program 1 times [2024-11-13 14:01:26,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:26,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465492135] [2024-11-13 14:01:26,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:26,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 14:01:26,506 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 14:01:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 14:01:26,529 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-13 14:01:26,529 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-13 14:01:26,529 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-13 14:01:26,529 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-13 14:01:26,530 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-13 14:01:26,530 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2024-11-13 14:01:26,530 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-13 14:01:26,530 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2024-11-13 14:01:26,530 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-13 14:01:26,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 14:01:26,530 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-13 14:01:26,531 WARN L247 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-13 14:01:26,531 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-13 14:01:26,559 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-13 14:01:26,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 110 transitions, 247 flow [2024-11-13 14:01:26,585 INFO L124 PetriNetUnfolderBase]: 42/248 cut-off events. [2024-11-13 14:01:26,586 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-13 14:01:26,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 248 events. 42/248 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1116 event pairs, 1 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 170. Up to 12 conditions per place. [2024-11-13 14:01:26,588 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 110 transitions, 247 flow [2024-11-13 14:01:26,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 110 transitions, 247 flow [2024-11-13 14:01:26,591 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 14:01:26,591 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;@5ce4ba53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 14:01:26,591 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-13 14:01:26,594 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 14:01:26,594 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-13 14:01:26,595 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 14:01:26,595 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:26,595 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 14:01:26,595 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 14:01:26,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:26,595 INFO L85 PathProgramCache]: Analyzing trace with hash 654969, now seen corresponding path program 1 times [2024-11-13 14:01:26,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:26,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755880714] [2024-11-13 14:01:26,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:26,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:26,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:26,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755880714] [2024-11-13 14:01:26,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755880714] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:01:26,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:01:26,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 14:01:26,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538287490] [2024-11-13 14:01:26,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:01:26,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:01:26,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:26,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:01:26,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:01:26,723 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 110 [2024-11-13 14:01:26,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 110 transitions, 247 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2024-11-13 14:01:26,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:26,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 110 [2024-11-13 14:01:26,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:35,109 INFO L124 PetriNetUnfolderBase]: 47447/78707 cut-off events. [2024-11-13 14:01:35,110 INFO L125 PetriNetUnfolderBase]: For 1236/1236 co-relation queries the response was YES. [2024-11-13 14:01:35,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145940 conditions, 78707 events. 47447/78707 cut-off events. For 1236/1236 co-relation queries the response was YES. Maximal size of possible extension queue 2012. Compared 706973 event pairs, 40780 based on Foata normal form. 23856/99464 useless extension candidates. Maximal degree in co-relation 53254. Up to 57237 conditions per place. [2024-11-13 14:01:35,884 INFO L140 encePairwiseOnDemand]: 84/110 looper letters, 74 selfloop transitions, 2 changer transitions 1/112 dead transitions. [2024-11-13 14:01:35,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 112 transitions, 405 flow [2024-11-13 14:01:35,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:01:35,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 14:01:35,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2024-11-13 14:01:35,887 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6787878787878788 [2024-11-13 14:01:35,887 INFO L175 Difference]: Start difference. First operand has 92 places, 110 transitions, 247 flow. Second operand 3 states and 224 transitions. [2024-11-13 14:01:35,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 112 transitions, 405 flow [2024-11-13 14:01:35,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 112 transitions, 405 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-13 14:01:35,896 INFO L231 Difference]: Finished difference. Result has 91 places, 84 transitions, 199 flow [2024-11-13 14:01:35,897 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=91, PETRI_TRANSITIONS=84} [2024-11-13 14:01:35,897 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -1 predicate places. [2024-11-13 14:01:35,897 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 84 transitions, 199 flow [2024-11-13 14:01:35,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2024-11-13 14:01:35,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:35,898 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 14:01:35,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-13 14:01:35,898 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 14:01:35,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:35,899 INFO L85 PathProgramCache]: Analyzing trace with hash 654970, now seen corresponding path program 1 times [2024-11-13 14:01:35,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:35,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700848747] [2024-11-13 14:01:35,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:35,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:36,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:36,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700848747] [2024-11-13 14:01:36,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700848747] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:01:36,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:01:36,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 14:01:36,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665339886] [2024-11-13 14:01:36,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:01:36,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:01:36,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:36,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:01:36,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:01:36,086 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 110 [2024-11-13 14:01:36,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 84 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2024-11-13 14:01:36,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:36,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 110 [2024-11-13 14:01:36,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:41,356 INFO L124 PetriNetUnfolderBase]: 40912/69187 cut-off events. [2024-11-13 14:01:41,356 INFO L125 PetriNetUnfolderBase]: For 2262/2336 co-relation queries the response was YES. [2024-11-13 14:01:41,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128547 conditions, 69187 events. 40912/69187 cut-off events. For 2262/2336 co-relation queries the response was YES. Maximal size of possible extension queue 1824. Compared 621202 event pairs, 40771 based on Foata normal form. 1/66026 useless extension candidates. Maximal degree in co-relation 116944. Up to 57216 conditions per place. [2024-11-13 14:01:41,677 INFO L140 encePairwiseOnDemand]: 106/110 looper letters, 57 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2024-11-13 14:01:41,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 95 transitions, 339 flow [2024-11-13 14:01:41,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:01:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 14:01:41,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2024-11-13 14:01:41,678 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-11-13 14:01:41,679 INFO L175 Difference]: Start difference. First operand has 91 places, 84 transitions, 199 flow. Second operand 3 states and 175 transitions. [2024-11-13 14:01:41,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 95 transitions, 339 flow [2024-11-13 14:01:41,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 95 transitions, 335 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 14:01:41,854 INFO L231 Difference]: Finished difference. Result has 91 places, 85 transitions, 209 flow [2024-11-13 14:01:41,855 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=91, PETRI_TRANSITIONS=85} [2024-11-13 14:01:41,855 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -1 predicate places. [2024-11-13 14:01:41,855 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 85 transitions, 209 flow [2024-11-13 14:01:41,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2024-11-13 14:01:41,856 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:41,856 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-13 14:01:41,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-13 14:01:41,856 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 14:01:41,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:41,856 INFO L85 PathProgramCache]: Analyzing trace with hash -691568464, now seen corresponding path program 1 times [2024-11-13 14:01:41,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:41,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771383091] [2024-11-13 14:01:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:41,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:42,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:42,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771383091] [2024-11-13 14:01:42,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771383091] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:01:42,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143183631] [2024-11-13 14:01:42,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:42,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:42,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:01:42,108 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:01:42,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 14:01:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:42,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 14:01:42,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:01:42,361 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 [2024-11-13 14:01:42,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:42,428 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:01:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:42,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143183631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:01:42,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:01:42,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-13 14:01:42,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438487327] [2024-11-13 14:01:42,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:01:42,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 14:01:42,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:42,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 14:01:42,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-13 14:01:42,610 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 110 [2024-11-13 14:01:42,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 85 transitions, 209 flow. Second operand has 9 states, 9 states have (on average 39.333333333333336) internal successors, (354), 9 states have internal predecessors, (354), 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) [2024-11-13 14:01:42,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:42,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 110 [2024-11-13 14:01:42,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:44,245 INFO L124 PetriNetUnfolderBase]: 10557/17688 cut-off events. [2024-11-13 14:01:44,246 INFO L125 PetriNetUnfolderBase]: For 3709/3709 co-relation queries the response was YES. [2024-11-13 14:01:44,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34248 conditions, 17688 events. 10557/17688 cut-off events. For 3709/3709 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 134203 event pairs, 1600 based on Foata normal form. 2220/19764 useless extension candidates. Maximal degree in co-relation 3508. Up to 11100 conditions per place. [2024-11-13 14:01:44,350 INFO L140 encePairwiseOnDemand]: 106/110 looper letters, 92 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2024-11-13 14:01:44,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 121 transitions, 462 flow [2024-11-13 14:01:44,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:01:44,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 14:01:44,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 324 transitions. [2024-11-13 14:01:44,352 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-11-13 14:01:44,352 INFO L175 Difference]: Start difference. First operand has 91 places, 85 transitions, 209 flow. Second operand 6 states and 324 transitions. [2024-11-13 14:01:44,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 121 transitions, 462 flow [2024-11-13 14:01:44,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 121 transitions, 458 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-13 14:01:44,356 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 154 flow [2024-11-13 14:01:44,356 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2024-11-13 14:01:44,357 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -19 predicate places. [2024-11-13 14:01:44,357 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 154 flow [2024-11-13 14:01:44,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 39.333333333333336) internal successors, (354), 9 states have internal predecessors, (354), 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) [2024-11-13 14:01:44,358 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:44,358 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2024-11-13 14:01:44,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 14:01:44,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f53c61-c934-408a-8c7d-4003b1f39f4e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 14:01:44,562 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 14:01:44,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:44,563 INFO L85 PathProgramCache]: Analyzing trace with hash -521846790, now seen corresponding path program 1 times [2024-11-13 14:01:44,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:44,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030009438] [2024-11-13 14:01:44,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:44,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 14:01:44,631 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 14:01:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 14:01:44,673 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-13 14:01:44,676 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-13 14:01:44,677 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-13 14:01:44,677 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-13 14:01:44,677 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-13 14:01:44,677 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2024-11-13 14:01:44,679 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-13 14:01:44,680 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2024-11-13 14:01:44,680 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-13 14:01:44,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-13 14:01:44,680 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-13 14:01:44,680 WARN L247 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-13 14:01:44,681 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-13 14:01:44,724 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-13 14:01:44,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 135 transitions, 310 flow [2024-11-13 14:01:44,779 INFO L124 PetriNetUnfolderBase]: 65/381 cut-off events. [2024-11-13 14:01:44,779 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-13 14:01:44,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 381 events. 65/381 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1857 event pairs, 6 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 272. Up to 32 conditions per place. [2024-11-13 14:01:44,783 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 135 transitions, 310 flow [2024-11-13 14:01:44,788 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 135 transitions, 310 flow [2024-11-13 14:01:44,789 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 14:01:44,790 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;@5ce4ba53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 14:01:44,791 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-13 14:01:44,794 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 14:01:44,795 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-13 14:01:44,795 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 14:01:44,795 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:44,795 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 14:01:44,795 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 14:01:44,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:44,796 INFO L85 PathProgramCache]: Analyzing trace with hash 789024, now seen corresponding path program 1 times [2024-11-13 14:01:44,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:44,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603865571] [2024-11-13 14:01:44,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:44,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:44,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:44,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603865571] [2024-11-13 14:01:44,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603865571] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:01:44,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:01:44,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 14:01:44,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82928864] [2024-11-13 14:01:44,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:01:44,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:01:44,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:44,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:01:44,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:01:44,902 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 135 [2024-11-13 14:01:44,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 135 transitions, 310 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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) [2024-11-13 14:01:44,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:44,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 135 [2024-11-13 14:01:44,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand