./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c9008ebcceff34245d74f1892a84a552f8268a9318e8a2970f14b3ec6b594daf --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:06:40,541 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:06:40,638 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:06:40,642 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:06:40,643 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:06:40,677 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:06:40,679 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:06:40,679 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:06:40,680 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:06:40,682 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:06:40,682 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:06:40,682 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:06:40,684 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:06:40,684 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:06:40,686 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:06:40,686 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:06:40,687 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:06:40,687 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:06:40,687 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:06:40,688 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:06:40,688 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:06:40,692 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:06:40,692 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:06:40,693 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:06:40,693 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:06:40,693 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:06:40,693 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:06:40,694 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:06:40,694 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:06:40,694 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:06:40,694 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:06:40,695 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:06:40,695 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:06:40,695 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:06:40,695 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:06:40,696 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:06:40,698 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:06:40,698 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:06:40,698 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:06:40,699 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:06:40,699 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:06:40,699 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:06:40,699 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9008ebcceff34245d74f1892a84a552f8268a9318e8a2970f14b3ec6b594daf [2024-10-31 22:06:40,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:06:41,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:06:41,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:06:41,016 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:06:41,017 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:06:41,018 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c Unable to find full path for "g++" [2024-10-31 22:06:43,044 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:06:43,288 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:06:43,289 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2024-10-31 22:06:43,304 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/data/4b8238270/c8be5dae178047f7b3c960e26d9cf765/FLAG322329503 [2024-10-31 22:06:43,324 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/data/4b8238270/c8be5dae178047f7b3c960e26d9cf765 [2024-10-31 22:06:43,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:06:43,329 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:06:43,330 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:06:43,331 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:06:43,340 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:06:43,341 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:06:43" (1/1) ... [2024-10-31 22:06:43,342 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c2f8531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:43, skipping insertion in model container [2024-10-31 22:06:43,343 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:06:43" (1/1) ... [2024-10-31 22:06:43,378 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:06:43,730 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 22:06:43,738 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 22:06:43,743 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:06:43,754 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:06:43,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:06:43,835 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:06:43,836 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:43 WrapperNode [2024-10-31 22:06:43,836 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:06:43,837 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:06:43,837 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:06:43,838 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:06:43,846 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:43" (1/1) ... [2024-10-31 22:06:43,856 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:43" (1/1) ... [2024-10-31 22:06:43,920 INFO L138 Inliner]: procedures = 26, calls = 52, calls flagged for inlining = 23, calls inlined = 35, statements flattened = 426 [2024-10-31 22:06:43,920 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:06:43,921 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:06:43,921 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:06:43,922 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:06:43,936 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:43" (1/1) ... [2024-10-31 22:06:43,937 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:43" (1/1) ... [2024-10-31 22:06:43,947 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:43" (1/1) ... [2024-10-31 22:06:44,003 INFO L175 MemorySlicer]: Split 26 memory accesses to 3 slices as follows [2, 9, 15]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 6 writes are split as follows [0, 3, 3]. [2024-10-31 22:06:44,011 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:43" (1/1) ... [2024-10-31 22:06:44,011 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:43" (1/1) ... [2024-10-31 22:06:44,060 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:43" (1/1) ... [2024-10-31 22:06:44,084 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:43" (1/1) ... [2024-10-31 22:06:44,094 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:43" (1/1) ... [2024-10-31 22:06:44,102 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:43" (1/1) ... [2024-10-31 22:06:44,107 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:06:44,108 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:06:44,108 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:06:44,108 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:06:44,110 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:43" (1/1) ... [2024-10-31 22:06:44,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:06:44,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:44,157 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:06:44,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:06:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:06:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:06:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:06:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:06:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:06:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:06:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:06:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:06:44,193 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:06:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:06:44,194 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:06:44,194 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-31 22:06:44,194 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-31 22:06:44,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:06:44,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:06:44,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:06:44,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:06:44,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:06:44,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:06:44,198 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:06:44,351 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:06:44,353 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:06:45,347 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:06:45,347 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:06:46,172 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:06:46,173 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-31 22:06:46,174 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:06:46 BoogieIcfgContainer [2024-10-31 22:06:46,174 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:06:46,178 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:06:46,180 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:06:46,184 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:06:46,184 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:06:43" (1/3) ... [2024-10-31 22:06:46,186 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dcf800e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:06:46, skipping insertion in model container [2024-10-31 22:06:46,186 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:43" (2/3) ... [2024-10-31 22:06:46,187 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dcf800e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:06:46, skipping insertion in model container [2024-10-31 22:06:46,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:06:46" (3/3) ... [2024-10-31 22:06:46,190 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-trans.wvr.c [2024-10-31 22:06:46,215 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:06:46,215 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2024-10-31 22:06:46,216 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:06:46,339 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-31 22:06:46,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 261 flow [2024-10-31 22:06:46,533 INFO L124 PetriNetUnfolderBase]: 12/117 cut-off events. [2024-10-31 22:06:46,534 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 22:06:46,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 117 events. 12/117 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 402 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2024-10-31 22:06:46,547 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 120 transitions, 261 flow [2024-10-31 22:06:46,559 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 116 transitions, 250 flow [2024-10-31 22:06:46,572 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:06:46,586 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;@2b8b2beb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:06:46,586 INFO L334 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2024-10-31 22:06:46,591 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:06:46,591 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:06:46,592 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:06:46,592 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:46,593 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:06:46,594 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-31 22:06:46,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:46,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1324850, now seen corresponding path program 1 times [2024-10-31 22:06:46,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:46,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003466698] [2024-10-31 22:06:46,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:46,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:47,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:47,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:47,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003466698] [2024-10-31 22:06:47,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003466698] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:47,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:47,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:06:47,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928068040] [2024-10-31 22:06:47,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:47,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:06:47,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:47,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:06:47,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:06:47,201 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-10-31 22:06:47,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 116 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:06:47,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:47,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-10-31 22:06:47,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:48,370 INFO L124 PetriNetUnfolderBase]: 2205/4833 cut-off events. [2024-10-31 22:06:48,370 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2024-10-31 22:06:48,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7937 conditions, 4833 events. 2205/4833 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39081 event pairs, 1390 based on Foata normal form. 1/3721 useless extension candidates. Maximal degree in co-relation 7419. Up to 2942 conditions per place. [2024-10-31 22:06:48,433 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 48 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-10-31 22:06:48,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 111 transitions, 340 flow [2024-10-31 22:06:48,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:06:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:06:48,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2024-10-31 22:06:48,452 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-10-31 22:06:48,454 INFO L175 Difference]: Start difference. First operand has 114 places, 116 transitions, 250 flow. Second operand 3 states and 249 transitions. [2024-10-31 22:06:48,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 111 transitions, 340 flow [2024-10-31 22:06:48,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 111 transitions, 328 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 22:06:48,467 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 232 flow [2024-10-31 22:06:48,470 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2024-10-31 22:06:48,473 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -9 predicate places. [2024-10-31 22:06:48,474 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 232 flow [2024-10-31 22:06:48,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:06:48,475 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:48,475 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:06:48,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:06:48,475 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-31 22:06:48,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:48,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1324851, now seen corresponding path program 1 times [2024-10-31 22:06:48,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:48,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891947342] [2024-10-31 22:06:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:48,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:48,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:48,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891947342] [2024-10-31 22:06:48,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891947342] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:48,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:48,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:06:48,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307128399] [2024-10-31 22:06:48,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:48,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:06:48,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:48,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:06:48,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:06:49,057 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-10-31 22:06:49,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:06:49,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:49,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-10-31 22:06:49,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:50,016 INFO L124 PetriNetUnfolderBase]: 2205/4835 cut-off events. [2024-10-31 22:06:50,016 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-10-31 22:06:50,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7844 conditions, 4835 events. 2205/4835 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39072 event pairs, 1390 based on Foata normal form. 0/3720 useless extension candidates. Maximal degree in co-relation 7809. Up to 2954 conditions per place. [2024-10-31 22:06:50,067 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 53 selfloop transitions, 2 changer transitions 0/113 dead transitions. [2024-10-31 22:06:50,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 346 flow [2024-10-31 22:06:50,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:06:50,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:06:50,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2024-10-31 22:06:50,073 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-10-31 22:06:50,073 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 232 flow. Second operand 3 states and 252 transitions. [2024-10-31 22:06:50,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 346 flow [2024-10-31 22:06:50,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 113 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:06:50,079 INFO L231 Difference]: Finished difference. Result has 106 places, 112 transitions, 242 flow [2024-10-31 22:06:50,080 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=106, PETRI_TRANSITIONS=112} [2024-10-31 22:06:50,081 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -8 predicate places. [2024-10-31 22:06:50,082 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 112 transitions, 242 flow [2024-10-31 22:06:50,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:06:50,082 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:50,083 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 22:06:50,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:06:50,084 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-31 22:06:50,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:50,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1273224688, now seen corresponding path program 1 times [2024-10-31 22:06:50,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:50,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436011109] [2024-10-31 22:06:50,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:50,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:50,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:50,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436011109] [2024-10-31 22:06:50,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436011109] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:06:50,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637496772] [2024-10-31 22:06:50,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:50,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:50,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:50,579 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:06:50,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:06:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:50,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 22:06:50,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:06:50,792 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 10 treesize of output 9 [2024-10-31 22:06:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:51,090 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:06:51,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:51,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637496772] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:06:51,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:06:51,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-31 22:06:51,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247558405] [2024-10-31 22:06:51,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:06:51,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:06:51,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:51,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:06:51,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:06:52,345 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-10-31 22:06:52,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 112 transitions, 242 flow. Second operand has 11 states, 11 states have (on average 66.36363636363636) internal successors, (730), 11 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:06:52,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:52,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-10-31 22:06:52,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:53,513 INFO L124 PetriNetUnfolderBase]: 2205/4834 cut-off events. [2024-10-31 22:06:53,514 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-10-31 22:06:53,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7846 conditions, 4834 events. 2205/4834 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39080 event pairs, 1390 based on Foata normal form. 0/3720 useless extension candidates. Maximal degree in co-relation 7833. Up to 2950 conditions per place. [2024-10-31 22:06:53,550 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 49 selfloop transitions, 5 changer transitions 0/112 dead transitions. [2024-10-31 22:06:53,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 112 transitions, 348 flow [2024-10-31 22:06:53,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:06:53,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:06:53,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 380 transitions. [2024-10-31 22:06:53,553 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-10-31 22:06:53,554 INFO L175 Difference]: Start difference. First operand has 106 places, 112 transitions, 242 flow. Second operand 5 states and 380 transitions. [2024-10-31 22:06:53,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 112 transitions, 348 flow [2024-10-31 22:06:53,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 112 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:06:53,557 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 254 flow [2024-10-31 22:06:53,557 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2024-10-31 22:06:53,558 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -5 predicate places. [2024-10-31 22:06:53,558 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 254 flow [2024-10-31 22:06:53,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 66.36363636363636) internal successors, (730), 11 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:06:53,559 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:53,559 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 22:06:53,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:06:53,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:53,764 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-31 22:06:53,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:53,765 INFO L85 PathProgramCache]: Analyzing trace with hash 815261611, now seen corresponding path program 1 times [2024-10-31 22:06:53,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:53,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793893565] [2024-10-31 22:06:53,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:53,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:06:54,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:54,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793893565] [2024-10-31 22:06:54,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793893565] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:54,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:54,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:06:54,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461978477] [2024-10-31 22:06:54,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:54,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:06:54,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:54,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:06:54,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:06:54,261 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-10-31 22:06:54,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:06:54,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:54,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-10-31 22:06:54,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:55,060 INFO L124 PetriNetUnfolderBase]: 2206/4837 cut-off events. [2024-10-31 22:06:55,061 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-10-31 22:06:55,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7860 conditions, 4837 events. 2206/4837 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39112 event pairs, 1390 based on Foata normal form. 0/3722 useless extension candidates. Maximal degree in co-relation 7831. Up to 2953 conditions per place. [2024-10-31 22:06:55,104 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 52 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2024-10-31 22:06:55,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 115 transitions, 374 flow [2024-10-31 22:06:55,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:06:55,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:06:55,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 318 transitions. [2024-10-31 22:06:55,107 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-10-31 22:06:55,107 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 254 flow. Second operand 4 states and 318 transitions. [2024-10-31 22:06:55,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 115 transitions, 374 flow [2024-10-31 22:06:55,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 115 transitions, 364 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-31 22:06:55,110 INFO L231 Difference]: Finished difference. Result has 110 places, 114 transitions, 269 flow [2024-10-31 22:06:55,111 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=269, PETRI_PLACES=110, PETRI_TRANSITIONS=114} [2024-10-31 22:06:55,112 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -4 predicate places. [2024-10-31 22:06:55,112 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 114 transitions, 269 flow [2024-10-31 22:06:55,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:06:55,113 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:55,113 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:55,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:06:55,113 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-31 22:06:55,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:55,114 INFO L85 PathProgramCache]: Analyzing trace with hash -496692954, now seen corresponding path program 1 times [2024-10-31 22:06:55,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:55,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375201137] [2024-10-31 22:06:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:55,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:06:55,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:55,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375201137] [2024-10-31 22:06:55,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375201137] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:55,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:55,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:06:55,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718710894] [2024-10-31 22:06:55,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:55,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:06:55,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:55,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:06:55,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:06:55,262 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-10-31 22:06:55,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 114 transitions, 269 flow. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:06:55,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:55,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-10-31 22:06:55,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:55,959 INFO L124 PetriNetUnfolderBase]: 2205/4836 cut-off events. [2024-10-31 22:06:55,959 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-10-31 22:06:55,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7860 conditions, 4836 events. 2205/4836 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39097 event pairs, 1390 based on Foata normal form. 1/3726 useless extension candidates. Maximal degree in co-relation 7832. Up to 2950 conditions per place. [2024-10-31 22:06:55,998 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 50 selfloop transitions, 4 changer transitions 0/114 dead transitions. [2024-10-31 22:06:55,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 114 transitions, 374 flow [2024-10-31 22:06:55,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:06:55,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:06:55,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 327 transitions. [2024-10-31 22:06:56,000 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68125 [2024-10-31 22:06:56,000 INFO L175 Difference]: Start difference. First operand has 110 places, 114 transitions, 269 flow. Second operand 4 states and 327 transitions. [2024-10-31 22:06:56,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 114 transitions, 374 flow [2024-10-31 22:06:56,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 114 transitions, 370 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:06:56,003 INFO L231 Difference]: Finished difference. Result has 111 places, 113 transitions, 268 flow [2024-10-31 22:06:56,004 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=111, PETRI_TRANSITIONS=113} [2024-10-31 22:06:56,007 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -3 predicate places. [2024-10-31 22:06:56,007 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 113 transitions, 268 flow [2024-10-31 22:06:56,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:06:56,007 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:56,008 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:56,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:06:56,009 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-31 22:06:56,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:56,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1782402732, now seen corresponding path program 1 times [2024-10-31 22:06:56,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:56,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477267198] [2024-10-31 22:06:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:56,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:06:56,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:56,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477267198] [2024-10-31 22:06:56,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477267198] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:06:56,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866887244] [2024-10-31 22:06:56,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:56,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:56,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:56,355 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:06:56,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:06:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:56,487 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 22:06:56,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:06:56,509 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 10 treesize of output 9 [2024-10-31 22:06:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:06:56,746 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:06:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:06:56,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866887244] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:06:56,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:06:56,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-10-31 22:06:56,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633312209] [2024-10-31 22:06:56,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:06:56,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:06:56,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:56,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:06:56,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:06:58,206 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-10-31 22:06:58,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 113 transitions, 268 flow. Second operand has 13 states, 13 states have (on average 66.61538461538461) internal successors, (866), 13 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:06:58,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:58,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-10-31 22:06:58,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:59,263 INFO L124 PetriNetUnfolderBase]: 2207/4841 cut-off events. [2024-10-31 22:06:59,264 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-10-31 22:06:59,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7881 conditions, 4841 events. 2207/4841 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39141 event pairs, 1390 based on Foata normal form. 0/3729 useless extension candidates. Maximal degree in co-relation 7839. Up to 2946 conditions per place. [2024-10-31 22:06:59,305 INFO L140 encePairwiseOnDemand]: 112/120 looper letters, 45 selfloop transitions, 16 changer transitions 0/119 dead transitions. [2024-10-31 22:06:59,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 119 transitions, 416 flow [2024-10-31 22:06:59,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:06:59,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:06:59,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 648 transitions. [2024-10-31 22:06:59,308 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-10-31 22:06:59,308 INFO L175 Difference]: Start difference. First operand has 111 places, 113 transitions, 268 flow. Second operand 9 states and 648 transitions. [2024-10-31 22:06:59,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 119 transitions, 416 flow [2024-10-31 22:06:59,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 119 transitions, 406 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:06:59,311 INFO L231 Difference]: Finished difference. Result has 115 places, 119 transitions, 316 flow [2024-10-31 22:06:59,311 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=316, PETRI_PLACES=115, PETRI_TRANSITIONS=119} [2024-10-31 22:06:59,312 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 1 predicate places. [2024-10-31 22:06:59,312 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 119 transitions, 316 flow [2024-10-31 22:06:59,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 66.61538461538461) internal successors, (866), 13 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:06:59,313 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:59,314 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:59,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:06:59,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:06:59,514 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-31 22:06:59,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:59,515 INFO L85 PathProgramCache]: Analyzing trace with hash -580089275, now seen corresponding path program 1 times [2024-10-31 22:06:59,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:59,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204079162] [2024-10-31 22:06:59,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:59,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:06:59,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:59,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204079162] [2024-10-31 22:06:59,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204079162] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:59,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:59,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:06:59,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25557136] [2024-10-31 22:06:59,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:59,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:06:59,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:59,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:06:59,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:07:00,047 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-10-31 22:07:00,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 119 transitions, 316 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:07:00,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:07:00,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-10-31 22:07:00,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:07:00,892 INFO L124 PetriNetUnfolderBase]: 2207/4843 cut-off events. [2024-10-31 22:07:00,892 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-10-31 22:07:00,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7896 conditions, 4843 events. 2207/4843 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 39096 event pairs, 1390 based on Foata normal form. 0/3731 useless extension candidates. Maximal degree in co-relation 7850. Up to 2958 conditions per place. [2024-10-31 22:07:00,936 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 58 selfloop transitions, 5 changer transitions 0/121 dead transitions. [2024-10-31 22:07:00,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 121 transitions, 446 flow [2024-10-31 22:07:00,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:07:00,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:07:00,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2024-10-31 22:07:00,938 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2024-10-31 22:07:00,938 INFO L175 Difference]: Start difference. First operand has 115 places, 119 transitions, 316 flow. Second operand 4 states and 317 transitions. [2024-10-31 22:07:00,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 121 transitions, 446 flow [2024-10-31 22:07:00,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 121 transitions, 427 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-10-31 22:07:00,944 INFO L231 Difference]: Finished difference. Result has 116 places, 120 transitions, 320 flow [2024-10-31 22:07:00,944 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=116, PETRI_TRANSITIONS=120} [2024-10-31 22:07:00,946 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 2 predicate places. [2024-10-31 22:07:00,946 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 120 transitions, 320 flow [2024-10-31 22:07:00,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:07:00,947 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:07:00,947 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:07:00,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:07:00,947 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-31 22:07:00,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:07:00,948 INFO L85 PathProgramCache]: Analyzing trace with hash 879998184, now seen corresponding path program 1 times [2024-10-31 22:07:00,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:07:00,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428948523] [2024-10-31 22:07:00,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:07:00,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:07:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:07:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:07:01,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:07:01,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428948523] [2024-10-31 22:07:01,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428948523] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:07:01,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441988696] [2024-10-31 22:07:01,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:07:01,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:07:01,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:07:01,365 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:07:01,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:07:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:07:01,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:07:01,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:07:01,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:07:01,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:07:01,718 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:07:01,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:07:01,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441988696] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:07:01,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:07:01,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-10-31 22:07:01,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062726666] [2024-10-31 22:07:01,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:07:01,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:07:01,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:07:01,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:07:01,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:07:02,911 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-10-31 22:07:02,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 120 transitions, 320 flow. Second operand has 13 states, 13 states have (on average 67.07692307692308) internal successors, (872), 13 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:07:02,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:07:02,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-10-31 22:07:02,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:07:03,855 INFO L124 PetriNetUnfolderBase]: 2208/4845 cut-off events. [2024-10-31 22:07:03,856 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-10-31 22:07:03,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7902 conditions, 4845 events. 2208/4845 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39091 event pairs, 1390 based on Foata normal form. 0/3733 useless extension candidates. Maximal degree in co-relation 7857. Up to 2950 conditions per place. [2024-10-31 22:07:03,895 INFO L140 encePairwiseOnDemand]: 111/120 looper letters, 47 selfloop transitions, 18 changer transitions 0/123 dead transitions. [2024-10-31 22:07:03,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 123 transitions, 458 flow [2024-10-31 22:07:03,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:07:03,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:07:03,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 647 transitions. [2024-10-31 22:07:03,898 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5990740740740741 [2024-10-31 22:07:03,898 INFO L175 Difference]: Start difference. First operand has 116 places, 120 transitions, 320 flow. Second operand 9 states and 647 transitions. [2024-10-31 22:07:03,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 123 transitions, 458 flow [2024-10-31 22:07:03,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 123 transitions, 453 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:07:03,901 INFO L231 Difference]: Finished difference. Result has 121 places, 123 transitions, 359 flow [2024-10-31 22:07:03,902 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=359, PETRI_PLACES=121, PETRI_TRANSITIONS=123} [2024-10-31 22:07:03,904 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 7 predicate places. [2024-10-31 22:07:03,905 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 123 transitions, 359 flow [2024-10-31 22:07:03,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 67.07692307692308) internal successors, (872), 13 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:07:03,906 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:07:03,907 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:07:03,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 22:07:04,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:07:04,107 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-31 22:07:04,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:07:04,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1510143368, now seen corresponding path program 1 times [2024-10-31 22:07:04,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:07:04,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835177637] [2024-10-31 22:07:04,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:07:04,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:07:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:07:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:07:04,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:07:04,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835177637] [2024-10-31 22:07:04,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835177637] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:07:04,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646670919] [2024-10-31 22:07:04,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:07:04,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:07:04,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:07:04,412 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:07:04,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:07:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:07:04,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-31 22:07:04,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:07:04,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:07:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:07:04,631 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:07:04,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646670919] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:07:04,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:07:04,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-10-31 22:07:04,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545020000] [2024-10-31 22:07:04,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:07:04,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:07:04,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:07:04,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:07:04,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:07:04,707 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-10-31 22:07:04,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 123 transitions, 359 flow. Second operand has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:07:04,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:07:04,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-10-31 22:07:04,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:07:05,241 INFO L124 PetriNetUnfolderBase]: 2209/4849 cut-off events. [2024-10-31 22:07:05,241 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-10-31 22:07:05,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7928 conditions, 4849 events. 2209/4849 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39132 event pairs, 1390 based on Foata normal form. 0/3736 useless extension candidates. Maximal degree in co-relation 7876. Up to 2968 conditions per place. [2024-10-31 22:07:05,274 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 66 selfloop transitions, 5 changer transitions 0/126 dead transitions. [2024-10-31 22:07:05,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 126 transitions, 507 flow [2024-10-31 22:07:05,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:07:05,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:07:05,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2024-10-31 22:07:05,276 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2024-10-31 22:07:05,276 INFO L175 Difference]: Start difference. First operand has 121 places, 123 transitions, 359 flow. Second operand 4 states and 317 transitions. [2024-10-31 22:07:05,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 126 transitions, 507 flow [2024-10-31 22:07:05,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 126 transitions, 482 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-10-31 22:07:05,279 INFO L231 Difference]: Finished difference. Result has 121 places, 125 transitions, 358 flow [2024-10-31 22:07:05,280 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=358, PETRI_PLACES=121, PETRI_TRANSITIONS=125} [2024-10-31 22:07:05,280 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 7 predicate places. [2024-10-31 22:07:05,281 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 125 transitions, 358 flow [2024-10-31 22:07:05,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:07:05,281 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:07:05,281 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:07:05,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:07:05,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:07:05,482 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-31 22:07:05,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:07:05,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1510143367, now seen corresponding path program 1 times [2024-10-31 22:07:05,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:07:05,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758137529] [2024-10-31 22:07:05,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:07:05,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:07:05,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:07:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:07:05,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:07:05,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758137529] [2024-10-31 22:07:05,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758137529] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:07:05,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:07:05,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:07:05,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118148297] [2024-10-31 22:07:05,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:07:05,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:07:05,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:07:05,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:07:05,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:07:05,617 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-10-31 22:07:05,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 125 transitions, 358 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:07:05,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:07:05,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-10-31 22:07:05,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:07:06,257 INFO L124 PetriNetUnfolderBase]: 2209/4845 cut-off events. [2024-10-31 22:07:06,257 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-10-31 22:07:06,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7918 conditions, 4845 events. 2209/4845 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39175 event pairs, 1390 based on Foata normal form. 2/3737 useless extension candidates. Maximal degree in co-relation 7869. Up to 2956 conditions per place. [2024-10-31 22:07:06,293 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 64 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2024-10-31 22:07:06,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 122 transitions, 486 flow [2024-10-31 22:07:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:07:06,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:07:06,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2024-10-31 22:07:06,295 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-10-31 22:07:06,295 INFO L175 Difference]: Start difference. First operand has 121 places, 125 transitions, 358 flow. Second operand 3 states and 248 transitions. [2024-10-31 22:07:06,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 122 transitions, 486 flow [2024-10-31 22:07:06,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 122 transitions, 480 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:07:06,298 INFO L231 Difference]: Finished difference. Result has 118 places, 122 transitions, 352 flow [2024-10-31 22:07:06,298 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=352, PETRI_PLACES=118, PETRI_TRANSITIONS=122} [2024-10-31 22:07:06,299 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 4 predicate places. [2024-10-31 22:07:06,299 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 122 transitions, 352 flow [2024-10-31 22:07:06,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:07:06,300 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:07:06,300 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:07:06,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 22:07:06,300 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-31 22:07:06,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:07:06,301 INFO L85 PathProgramCache]: Analyzing trace with hash -430193655, now seen corresponding path program 1 times [2024-10-31 22:07:06,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:07:06,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820151115] [2024-10-31 22:07:06,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:07:06,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:07:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:07:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:07:06,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:07:06,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820151115] [2024-10-31 22:07:06,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820151115] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:07:06,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:07:06,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:07:06,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990187336] [2024-10-31 22:07:06,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:07:06,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:07:06,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:07:06,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:07:06,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:07:06,455 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-10-31 22:07:06,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 352 flow. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:07:06,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:07:06,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-10-31 22:07:06,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:07:07,088 INFO L124 PetriNetUnfolderBase]: 2208/4844 cut-off events. [2024-10-31 22:07:07,088 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-10-31 22:07:07,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7915 conditions, 4844 events. 2208/4844 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 39174 event pairs, 1390 based on Foata normal form. 1/3736 useless extension candidates. Maximal degree in co-relation 7867. Up to 2964 conditions per place. [2024-10-31 22:07:07,121 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 63 selfloop transitions, 4 changer transitions 0/122 dead transitions. [2024-10-31 22:07:07,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 122 transitions, 484 flow [2024-10-31 22:07:07,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:07:07,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:07:07,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 325 transitions. [2024-10-31 22:07:07,123 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2024-10-31 22:07:07,123 INFO L175 Difference]: Start difference. First operand has 118 places, 122 transitions, 352 flow. Second operand 4 states and 325 transitions. [2024-10-31 22:07:07,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 122 transitions, 484 flow [2024-10-31 22:07:07,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 122 transitions, 478 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:07:07,126 INFO L231 Difference]: Finished difference. Result has 119 places, 121 transitions, 350 flow [2024-10-31 22:07:07,127 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=119, PETRI_TRANSITIONS=121} [2024-10-31 22:07:07,127 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 5 predicate places. [2024-10-31 22:07:07,127 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 121 transitions, 350 flow [2024-10-31 22:07:07,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:07:07,128 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:07:07,128 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:07:07,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 22:07:07,129 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-31 22:07:07,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:07:07,129 INFO L85 PathProgramCache]: Analyzing trace with hash -451124234, now seen corresponding path program 1 times [2024-10-31 22:07:07,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:07:07,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813332318] [2024-10-31 22:07:07,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:07:07,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:07:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:07:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:07:07,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:07:07,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813332318] [2024-10-31 22:07:07,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813332318] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:07:07,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062468757] [2024-10-31 22:07:07,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:07:07,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:07:07,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:07:07,338 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:07:07,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:07:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:07:07,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:07:07,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:07:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:07:07,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:07:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:07:07,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062468757] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:07:07,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:07:07,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-10-31 22:07:07,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791836645] [2024-10-31 22:07:07,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:07:07,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:07:07,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:07:07,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:07:07,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:07:07,978 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-10-31 22:07:07,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 121 transitions, 350 flow. Second operand has 14 states, 14 states have (on average 70.0) internal successors, (980), 14 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:07:07,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:07:07,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-10-31 22:07:07,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:07:09,397 INFO L124 PetriNetUnfolderBase]: 4402/9628 cut-off events. [2024-10-31 22:07:09,398 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-10-31 22:07:09,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15715 conditions, 9628 events. 4402/9628 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 87455 event pairs, 2784 based on Foata normal form. 1/7507 useless extension candidates. Maximal degree in co-relation 7860. Up to 2944 conditions per place. [2024-10-31 22:07:09,460 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 88 selfloop transitions, 34 changer transitions 0/177 dead transitions. [2024-10-31 22:07:09,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 177 transitions, 758 flow [2024-10-31 22:07:09,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:07:09,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:07:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 716 transitions. [2024-10-31 22:07:09,463 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-10-31 22:07:09,463 INFO L175 Difference]: Start difference. First operand has 119 places, 121 transitions, 350 flow. Second operand 9 states and 716 transitions. [2024-10-31 22:07:09,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 177 transitions, 758 flow [2024-10-31 22:07:09,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 177 transitions, 744 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:07:09,472 INFO L231 Difference]: Finished difference. Result has 128 places, 139 transitions, 540 flow [2024-10-31 22:07:09,472 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=540, PETRI_PLACES=128, PETRI_TRANSITIONS=139} [2024-10-31 22:07:09,472 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 14 predicate places. [2024-10-31 22:07:09,473 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 139 transitions, 540 flow [2024-10-31 22:07:09,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.0) internal successors, (980), 14 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:07:09,474 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:07:09,474 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:07:09,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:07:09,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02962990-4000-4eae-822e-d5e3326338c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:07:09,678 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-10-31 22:07:09,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:07:09,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1099947173, now seen corresponding path program 1 times [2024-10-31 22:07:09,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:07:09,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790558758] [2024-10-31 22:07:09,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:07:09,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:07:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat