./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 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_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX --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 dbd0a32f8466e9a1ac86b6dfec2b7453fe6f40d8d953742d93d3d05c5ad7b7af --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 17:50:51,141 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 17:50:51,270 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 17:50:51,278 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 17:50:51,282 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 17:50:51,328 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 17:50:51,328 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 17:50:51,329 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 17:50:51,331 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 17:50:51,332 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 17:50:51,333 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 17:50:51,333 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 17:50:51,334 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 17:50:51,335 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 17:50:51,338 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 17:50:51,339 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 17:50:51,339 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 17:50:51,339 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 17:50:51,340 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 17:50:51,340 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 17:50:51,344 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 17:50:51,345 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 17:50:51,345 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 17:50:51,346 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 17:50:51,346 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 17:50:51,346 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 17:50:51,347 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 17:50:51,347 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 17:50:51,347 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 17:50:51,348 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 17:50:51,351 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 17:50:51,351 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 17:50:51,352 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 17:50:51,353 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:50:51,353 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 17:50:51,354 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 17:50:51,354 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 17:50:51,354 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 17:50:51,355 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 17:50:51,355 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 17:50:51,355 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 17:50:51,357 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 17:50:51,357 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_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dbd0a32f8466e9a1ac86b6dfec2b7453fe6f40d8d953742d93d3d05c5ad7b7af [2024-11-08 17:50:51,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 17:50:51,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 17:50:51,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 17:50:51,774 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 17:50:51,775 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 17:50:51,777 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c Unable to find full path for "g++" [2024-11-08 17:50:54,309 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 17:50:54,552 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 17:50:54,553 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2024-11-08 17:50:54,564 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/data/7c7356c67/ff585d7e6b0e4bf49d43fc6798b3b2e2/FLAG001ba4c51 [2024-11-08 17:50:54,583 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/data/7c7356c67/ff585d7e6b0e4bf49d43fc6798b3b2e2 [2024-11-08 17:50:54,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 17:50:54,587 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 17:50:54,589 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 17:50:54,590 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 17:50:54,598 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 17:50:54,599 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:50:54" (1/1) ... [2024-11-08 17:50:54,601 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31515325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:50:54, skipping insertion in model container [2024-11-08 17:50:54,602 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:50:54" (1/1) ... [2024-11-08 17:50:54,633 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 17:50:54,912 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 17:50:54,916 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:50:54,929 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 17:50:54,962 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:50:54,984 INFO L204 MainTranslator]: Completed translation [2024-11-08 17:50:54,985 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:50:54 WrapperNode [2024-11-08 17:50:54,985 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 17:50:54,986 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 17:50:54,986 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 17:50:54,987 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 17:50:54,996 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:50:54" (1/1) ... [2024-11-08 17:50:55,005 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:50:54" (1/1) ... [2024-11-08 17:50:55,035 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 89 [2024-11-08 17:50:55,040 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 17:50:55,041 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 17:50:55,041 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 17:50:55,041 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 17:50:55,051 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:50:54" (1/1) ... [2024-11-08 17:50:55,051 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:50:54" (1/1) ... [2024-11-08 17:50:55,055 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:50:54" (1/1) ... [2024-11-08 17:50:55,075 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-08 17:50:55,076 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:50:54" (1/1) ... [2024-11-08 17:50:55,076 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:50:54" (1/1) ... [2024-11-08 17:50:55,085 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:50:54" (1/1) ... [2024-11-08 17:50:55,090 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:50:54" (1/1) ... [2024-11-08 17:50:55,092 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:50:54" (1/1) ... [2024-11-08 17:50:55,094 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:50:54" (1/1) ... [2024-11-08 17:50:55,097 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 17:50:55,098 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 17:50:55,098 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 17:50:55,099 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 17:50:55,100 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:50:54" (1/1) ... [2024-11-08 17:50:55,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:50:55,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:50:55,147 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 17:50:55,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 17:50:55,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 17:50:55,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 17:50:55,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 17:50:55,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 17:50:55,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 17:50:55,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-08 17:50:55,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-08 17:50:55,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 17:50:55,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 17:50:55,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 17:50:55,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 17:50:55,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-08 17:50:55,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-08 17:50:55,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 17:50:55,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 17:50:55,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 17:50:55,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 17:50:55,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 17:50:55,204 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 17:50:55,431 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 17:50:55,434 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 17:50:56,034 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 17:50:56,035 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 17:50:56,368 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 17:50:56,369 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 17:50:56,369 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:50:56 BoogieIcfgContainer [2024-11-08 17:50:56,370 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 17:50:56,374 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 17:50:56,374 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 17:50:56,380 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 17:50:56,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 05:50:54" (1/3) ... [2024-11-08 17:50:56,382 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b680b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:50:56, skipping insertion in model container [2024-11-08 17:50:56,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:50:54" (2/3) ... [2024-11-08 17:50:56,384 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b680b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:50:56, skipping insertion in model container [2024-11-08 17:50:56,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:50:56" (3/3) ... [2024-11-08 17:50:56,388 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-le-max.wvr.c [2024-11-08 17:50:56,411 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 17:50:56,412 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-08 17:50:56,412 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 17:50:56,504 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-08 17:50:56,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 59 transitions, 139 flow [2024-11-08 17:50:56,603 INFO L124 PetriNetUnfolderBase]: 6/56 cut-off events. [2024-11-08 17:50:56,603 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-08 17:50:56,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 56 events. 6/56 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 124 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-11-08 17:50:56,608 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 59 transitions, 139 flow [2024-11-08 17:50:56,614 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 55 transitions, 128 flow [2024-11-08 17:50:56,627 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 17:50:56,637 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;@2d9b75ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 17:50:56,637 INFO L334 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2024-11-08 17:50:56,644 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 17:50:56,647 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-08 17:50:56,648 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 17:50:56,651 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:50:56,652 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 17:50:56,653 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-08 17:50:56,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:50:56,666 INFO L85 PathProgramCache]: Analyzing trace with hash 12658846, now seen corresponding path program 1 times [2024-11-08 17:50:56,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:50:56,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262606894] [2024-11-08 17:50:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:50:56,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:50:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:50:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:50:57,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:50:57,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262606894] [2024-11-08 17:50:57,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262606894] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:50:57,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:50:57,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:50:57,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978590684] [2024-11-08 17:50:57,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:50:57,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:50:57,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:50:57,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:50:57,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:50:57,250 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 59 [2024-11-08 17:50:57,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:50:57,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:50:57,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 59 [2024-11-08 17:50:57,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:50:57,670 INFO L124 PetriNetUnfolderBase]: 336/592 cut-off events. [2024-11-08 17:50:57,671 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-08 17:50:57,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1179 conditions, 592 events. 336/592 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3030 event pairs, 263 based on Foata normal form. 1/465 useless extension candidates. Maximal degree in co-relation 1078. Up to 504 conditions per place. [2024-11-08 17:50:57,684 INFO L140 encePairwiseOnDemand]: 47/59 looper letters, 25 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2024-11-08 17:50:57,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 44 transitions, 160 flow [2024-11-08 17:50:57,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:50:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:50:57,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-11-08 17:50:57,701 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5127118644067796 [2024-11-08 17:50:57,703 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 128 flow. Second operand 4 states and 121 transitions. [2024-11-08 17:50:57,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 44 transitions, 160 flow [2024-11-08 17:50:57,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 148 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 17:50:57,716 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 98 flow [2024-11-08 17:50:57,719 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2024-11-08 17:50:57,724 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, -14 predicate places. [2024-11-08 17:50:57,724 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 98 flow [2024-11-08 17:50:57,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:50:57,725 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:50:57,725 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 17:50:57,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 17:50:57,725 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-08 17:50:57,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:50:57,726 INFO L85 PathProgramCache]: Analyzing trace with hash 12658847, now seen corresponding path program 1 times [2024-11-08 17:50:57,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:50:57,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940113318] [2024-11-08 17:50:57,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:50:57,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:50:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:50:57,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:50:57,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:50:57,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940113318] [2024-11-08 17:50:57,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940113318] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:50:57,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:50:57,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:50:57,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487947668] [2024-11-08 17:50:57,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:50:57,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:50:57,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:50:57,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:50:57,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:50:58,024 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 59 [2024-11-08 17:50:58,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:50:58,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:50:58,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 59 [2024-11-08 17:50:58,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:50:58,269 INFO L124 PetriNetUnfolderBase]: 337/598 cut-off events. [2024-11-08 17:50:58,269 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 17:50:58,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1147 conditions, 598 events. 337/598 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3007 event pairs, 263 based on Foata normal form. 1/470 useless extension candidates. Maximal degree in co-relation 1118. Up to 510 conditions per place. [2024-11-08 17:50:58,281 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 29 selfloop transitions, 2 changer transitions 2/48 dead transitions. [2024-11-08 17:50:58,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 48 transitions, 172 flow [2024-11-08 17:50:58,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:50:58,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:50:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-11-08 17:50:58,286 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5169491525423728 [2024-11-08 17:50:58,286 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 98 flow. Second operand 4 states and 122 transitions. [2024-11-08 17:50:58,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 48 transitions, 172 flow [2024-11-08 17:50:58,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 48 transitions, 169 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:50:58,293 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 111 flow [2024-11-08 17:50:58,294 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2024-11-08 17:50:58,295 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, -11 predicate places. [2024-11-08 17:50:58,296 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 111 flow [2024-11-08 17:50:58,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:50:58,296 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:50:58,297 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 17:50:58,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 17:50:58,297 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-08 17:50:58,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:50:58,298 INFO L85 PathProgramCache]: Analyzing trace with hash 12659823, now seen corresponding path program 1 times [2024-11-08 17:50:58,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:50:58,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460396020] [2024-11-08 17:50:58,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:50:58,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:50:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:50:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:50:58,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:50:58,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460396020] [2024-11-08 17:50:58,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460396020] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:50:58,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:50:58,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:50:58,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606305133] [2024-11-08 17:50:58,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:50:58,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:50:58,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:50:58,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:50:58,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:50:58,895 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 59 [2024-11-08 17:50:58,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 111 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:50:58,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:50:58,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 59 [2024-11-08 17:50:58,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:50:59,158 INFO L124 PetriNetUnfolderBase]: 336/595 cut-off events. [2024-11-08 17:50:59,159 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 17:50:59,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 595 events. 336/595 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2992 event pairs, 263 based on Foata normal form. 1/469 useless extension candidates. Maximal degree in co-relation 1137. Up to 512 conditions per place. [2024-11-08 17:50:59,165 INFO L140 encePairwiseOnDemand]: 55/59 looper letters, 31 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2024-11-08 17:50:59,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 47 transitions, 183 flow [2024-11-08 17:50:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:50:59,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:50:59,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-11-08 17:50:59,170 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4872881355932203 [2024-11-08 17:50:59,171 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 111 flow. Second operand 4 states and 115 transitions. [2024-11-08 17:50:59,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 47 transitions, 183 flow [2024-11-08 17:50:59,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 179 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-08 17:50:59,175 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 123 flow [2024-11-08 17:50:59,176 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2024-11-08 17:50:59,177 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, -9 predicate places. [2024-11-08 17:50:59,177 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 123 flow [2024-11-08 17:50:59,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:50:59,179 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:50:59,179 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-08 17:50:59,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 17:50:59,179 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-08 17:50:59,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:50:59,181 INFO L85 PathProgramCache]: Analyzing trace with hash -807889542, now seen corresponding path program 1 times [2024-11-08 17:50:59,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:50:59,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731022972] [2024-11-08 17:50:59,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:50:59,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:50:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:50:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:50:59,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:50:59,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731022972] [2024-11-08 17:50:59,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731022972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:50:59,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140096379] [2024-11-08 17:50:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:50:59,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:50:59,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:50:59,787 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:50:59,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 17:50:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:50:59,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 17:50:59,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:51:00,021 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 [2024-11-08 17:51:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:51:00,592 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:51:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:51:00,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140096379] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:51:00,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:51:00,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-08 17:51:00,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600155125] [2024-11-08 17:51:00,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:51:00,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 17:51:00,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:51:00,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 17:51:00,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:51:01,203 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 59 [2024-11-08 17:51:01,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 123 flow. Second operand has 12 states, 12 states have (on average 21.75) internal successors, (261), 12 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:01,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:51:01,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 59 [2024-11-08 17:51:01,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:51:01,710 INFO L124 PetriNetUnfolderBase]: 336/598 cut-off events. [2024-11-08 17:51:01,711 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-08 17:51:01,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1167 conditions, 598 events. 336/598 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3016 event pairs, 263 based on Foata normal form. 4/475 useless extension candidates. Maximal degree in co-relation 1146. Up to 506 conditions per place. [2024-11-08 17:51:01,720 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 28 selfloop transitions, 9 changer transitions 0/50 dead transitions. [2024-11-08 17:51:01,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 208 flow [2024-11-08 17:51:01,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 17:51:01,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 17:51:01,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-11-08 17:51:01,723 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4258474576271186 [2024-11-08 17:51:01,723 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 123 flow. Second operand 8 states and 201 transitions. [2024-11-08 17:51:01,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 208 flow [2024-11-08 17:51:01,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 202 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 17:51:01,727 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 138 flow [2024-11-08 17:51:01,727 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=138, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-11-08 17:51:01,728 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, -6 predicate places. [2024-11-08 17:51:01,728 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 138 flow [2024-11-08 17:51:01,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.75) internal successors, (261), 12 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:01,729 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:51:01,729 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:51:01,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 17:51:01,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:51:01,931 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-08 17:51:01,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:51:01,931 INFO L85 PathProgramCache]: Analyzing trace with hash -807890518, now seen corresponding path program 1 times [2024-11-08 17:51:01,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:51:01,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937664555] [2024-11-08 17:51:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:51:01,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:51:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:51:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:51:02,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:51:02,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937664555] [2024-11-08 17:51:02,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937664555] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:51:02,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420951825] [2024-11-08 17:51:02,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:51:02,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:51:02,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:51:02,219 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:51:02,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 17:51:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:51:02,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-08 17:51:02,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:51:02,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 17:51:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:51:02,414 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:51:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:51:02,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420951825] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 17:51:02,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:51:02,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 8 [2024-11-08 17:51:02,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911253261] [2024-11-08 17:51:02,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:51:02,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:51:02,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:51:02,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:51:02,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-08 17:51:02,594 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 59 [2024-11-08 17:51:02,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:02,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:51:02,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 59 [2024-11-08 17:51:02,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:51:02,784 INFO L124 PetriNetUnfolderBase]: 336/596 cut-off events. [2024-11-08 17:51:02,785 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-08 17:51:02,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1165 conditions, 596 events. 336/596 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3057 event pairs, 263 based on Foata normal form. 0/469 useless extension candidates. Maximal degree in co-relation 1128. Up to 505 conditions per place. [2024-11-08 17:51:02,791 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 27 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-11-08 17:51:02,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 46 transitions, 198 flow [2024-11-08 17:51:02,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:51:02,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:51:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-11-08 17:51:02,793 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47796610169491527 [2024-11-08 17:51:02,794 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 138 flow. Second operand 5 states and 141 transitions. [2024-11-08 17:51:02,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 46 transitions, 198 flow [2024-11-08 17:51:02,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 46 transitions, 181 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-08 17:51:02,797 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 125 flow [2024-11-08 17:51:02,797 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-11-08 17:51:02,798 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, -8 predicate places. [2024-11-08 17:51:02,798 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 125 flow [2024-11-08 17:51:02,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:02,799 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:51:02,799 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:51:02,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 17:51:02,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:51:03,000 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-08 17:51:03,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:51:03,001 INFO L85 PathProgramCache]: Analyzing trace with hash 606016827, now seen corresponding path program 1 times [2024-11-08 17:51:03,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:51:03,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582905685] [2024-11-08 17:51:03,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:51:03,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:51:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:51:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:51:03,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:51:03,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582905685] [2024-11-08 17:51:03,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582905685] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:51:03,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:51:03,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:51:03,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090344287] [2024-11-08 17:51:03,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:51:03,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 17:51:03,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:51:03,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 17:51:03,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-08 17:51:03,191 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 59 [2024-11-08 17:51:03,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 125 flow. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:03,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:51:03,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 59 [2024-11-08 17:51:03,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:51:03,465 INFO L124 PetriNetUnfolderBase]: 524/944 cut-off events. [2024-11-08 17:51:03,466 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-08 17:51:03,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1739 conditions, 944 events. 524/944 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5164 event pairs, 263 based on Foata normal form. 0/735 useless extension candidates. Maximal degree in co-relation 1700. Up to 535 conditions per place. [2024-11-08 17:51:03,475 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 37 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-11-08 17:51:03,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 59 transitions, 243 flow [2024-11-08 17:51:03,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:51:03,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 17:51:03,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-11-08 17:51:03,477 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4915254237288136 [2024-11-08 17:51:03,477 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 125 flow. Second operand 6 states and 174 transitions. [2024-11-08 17:51:03,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 59 transitions, 243 flow [2024-11-08 17:51:03,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 237 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 17:51:03,481 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 146 flow [2024-11-08 17:51:03,481 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2024-11-08 17:51:03,482 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, -5 predicate places. [2024-11-08 17:51:03,482 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 146 flow [2024-11-08 17:51:03,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:03,483 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:51:03,483 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:51:03,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 17:51:03,484 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-08 17:51:03,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:51:03,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2013243691, now seen corresponding path program 1 times [2024-11-08 17:51:03,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:51:03,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903294116] [2024-11-08 17:51:03,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:51:03,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:51:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:51:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:51:03,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:51:03,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903294116] [2024-11-08 17:51:03,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903294116] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:51:03,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584235558] [2024-11-08 17:51:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:51:03,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:51:03,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:51:03,829 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:51:03,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 17:51:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:51:03,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 17:51:03,934 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:51:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:51:04,032 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:51:04,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584235558] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:51:04,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 17:51:04,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2024-11-08 17:51:04,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191690784] [2024-11-08 17:51:04,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:51:04,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:51:04,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:51:04,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:51:04,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-08 17:51:04,079 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 59 [2024-11-08 17:51:04,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:04,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:51:04,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 59 [2024-11-08 17:51:04,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:51:04,366 INFO L124 PetriNetUnfolderBase]: 797/1424 cut-off events. [2024-11-08 17:51:04,366 INFO L125 PetriNetUnfolderBase]: For 326/326 co-relation queries the response was YES. [2024-11-08 17:51:04,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2906 conditions, 1424 events. 797/1424 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8002 event pairs, 375 based on Foata normal form. 0/1159 useless extension candidates. Maximal degree in co-relation 2866. Up to 767 conditions per place. [2024-11-08 17:51:04,381 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 43 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2024-11-08 17:51:04,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 62 transitions, 287 flow [2024-11-08 17:51:04,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:51:04,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:51:04,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-11-08 17:51:04,383 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5466101694915254 [2024-11-08 17:51:04,383 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 146 flow. Second operand 4 states and 129 transitions. [2024-11-08 17:51:04,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 62 transitions, 287 flow [2024-11-08 17:51:04,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 62 transitions, 273 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 17:51:04,387 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 156 flow [2024-11-08 17:51:04,387 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-11-08 17:51:04,388 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, -5 predicate places. [2024-11-08 17:51:04,389 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 156 flow [2024-11-08 17:51:04,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:04,389 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:51:04,390 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:51:04,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 17:51:04,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:51:04,591 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-08 17:51:04,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:51:04,592 INFO L85 PathProgramCache]: Analyzing trace with hash 683833463, now seen corresponding path program 1 times [2024-11-08 17:51:04,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:51:04,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004058617] [2024-11-08 17:51:04,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:51:04,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:51:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:51:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:51:04,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:51:04,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004058617] [2024-11-08 17:51:04,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004058617] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:51:04,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780763445] [2024-11-08 17:51:04,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:51:04,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:51:04,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:51:04,803 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:51:04,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 17:51:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:51:04,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 17:51:04,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:51:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:51:05,073 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:51:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:51:05,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780763445] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:51:05,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:51:05,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-08 17:51:05,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882510906] [2024-11-08 17:51:05,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:51:05,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 17:51:05,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:51:05,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 17:51:05,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:51:05,341 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 59 [2024-11-08 17:51:05,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 156 flow. Second operand has 14 states, 14 states have (on average 19.714285714285715) internal successors, (276), 14 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:05,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:51:05,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 59 [2024-11-08 17:51:05,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:51:06,381 INFO L124 PetriNetUnfolderBase]: 2353/3740 cut-off events. [2024-11-08 17:51:06,382 INFO L125 PetriNetUnfolderBase]: For 1157/1157 co-relation queries the response was YES. [2024-11-08 17:51:06,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8740 conditions, 3740 events. 2353/3740 cut-off events. For 1157/1157 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 21782 event pairs, 1078 based on Foata normal form. 0/3183 useless extension candidates. Maximal degree in co-relation 5201. Up to 1590 conditions per place. [2024-11-08 17:51:06,417 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 110 selfloop transitions, 17 changer transitions 0/134 dead transitions. [2024-11-08 17:51:06,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 134 transitions, 681 flow [2024-11-08 17:51:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 17:51:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-08 17:51:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 301 transitions. [2024-11-08 17:51:06,419 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4637904468412943 [2024-11-08 17:51:06,420 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 156 flow. Second operand 11 states and 301 transitions. [2024-11-08 17:51:06,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 134 transitions, 681 flow [2024-11-08 17:51:06,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 134 transitions, 659 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:51:06,426 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 234 flow [2024-11-08 17:51:06,426 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=234, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2024-11-08 17:51:06,427 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 7 predicate places. [2024-11-08 17:51:06,427 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 234 flow [2024-11-08 17:51:06,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.714285714285715) internal successors, (276), 14 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:06,428 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:51:06,428 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:51:06,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 17:51:06,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:51:06,633 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-08 17:51:06,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:51:06,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1319291033, now seen corresponding path program 1 times [2024-11-08 17:51:06,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:51:06,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987156058] [2024-11-08 17:51:06,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:51:06,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:51:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:51:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:51:06,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:51:06,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987156058] [2024-11-08 17:51:06,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987156058] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:51:06,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212896656] [2024-11-08 17:51:06,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:51:06,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:51:06,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:51:06,801 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:51:06,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 17:51:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:51:06,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 17:51:06,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:51:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:51:07,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:51:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:51:07,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212896656] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:51:07,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:51:07,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-08 17:51:07,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271992382] [2024-11-08 17:51:07,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:51:07,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 17:51:07,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:51:07,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 17:51:07,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:51:07,341 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 59 [2024-11-08 17:51:07,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 234 flow. Second operand has 14 states, 14 states have (on average 19.857142857142858) internal successors, (278), 14 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) [2024-11-08 17:51:07,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:51:07,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 59 [2024-11-08 17:51:07,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:51:08,266 INFO L124 PetriNetUnfolderBase]: 1992/3028 cut-off events. [2024-11-08 17:51:08,266 INFO L125 PetriNetUnfolderBase]: For 2599/2637 co-relation queries the response was YES. [2024-11-08 17:51:08,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7981 conditions, 3028 events. 1992/3028 cut-off events. For 2599/2637 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16528 event pairs, 974 based on Foata normal form. 0/2712 useless extension candidates. Maximal degree in co-relation 5235. Up to 1594 conditions per place. [2024-11-08 17:51:08,299 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 98 selfloop transitions, 17 changer transitions 0/125 dead transitions. [2024-11-08 17:51:08,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 125 transitions, 711 flow [2024-11-08 17:51:08,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 17:51:08,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-08 17:51:08,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 293 transitions. [2024-11-08 17:51:08,302 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4514637904468413 [2024-11-08 17:51:08,302 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 234 flow. Second operand 11 states and 293 transitions. [2024-11-08 17:51:08,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 125 transitions, 711 flow [2024-11-08 17:51:08,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 125 transitions, 697 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-08 17:51:08,315 INFO L231 Difference]: Finished difference. Result has 77 places, 64 transitions, 300 flow [2024-11-08 17:51:08,315 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=300, PETRI_PLACES=77, PETRI_TRANSITIONS=64} [2024-11-08 17:51:08,316 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 18 predicate places. [2024-11-08 17:51:08,316 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 64 transitions, 300 flow [2024-11-08 17:51:08,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.857142857142858) internal successors, (278), 14 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) [2024-11-08 17:51:08,317 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:51:08,317 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:51:08,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 17:51:08,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:51:08,522 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-08 17:51:08,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:51:08,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2092607156, now seen corresponding path program 2 times [2024-11-08 17:51:08,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:51:08,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853459520] [2024-11-08 17:51:08,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:51:08,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:51:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:51:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:51:09,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:51:09,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853459520] [2024-11-08 17:51:09,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853459520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:51:09,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496935563] [2024-11-08 17:51:09,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:51:09,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:51:09,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:51:09,045 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:51:09,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 17:51:09,161 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:51:09,161 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:51:09,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-08 17:51:09,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:51:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:51:09,440 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:51:09,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-08 17:51:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:51:09,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496935563] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:51:09,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:51:09,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2024-11-08 17:51:09,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327619449] [2024-11-08 17:51:09,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:51:09,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 17:51:09,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:51:09,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 17:51:09,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-11-08 17:51:10,575 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 59 [2024-11-08 17:51:10,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 64 transitions, 300 flow. Second operand has 21 states, 21 states have (on average 23.904761904761905) internal successors, (502), 21 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:10,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:51:10,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 59 [2024-11-08 17:51:10,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:51:11,730 INFO L124 PetriNetUnfolderBase]: 1392/2458 cut-off events. [2024-11-08 17:51:11,730 INFO L125 PetriNetUnfolderBase]: For 2462/2499 co-relation queries the response was YES. [2024-11-08 17:51:11,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6684 conditions, 2458 events. 1392/2458 cut-off events. For 2462/2499 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 14578 event pairs, 504 based on Foata normal form. 44/2416 useless extension candidates. Maximal degree in co-relation 4775. Up to 678 conditions per place. [2024-11-08 17:51:11,763 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 99 selfloop transitions, 14 changer transitions 0/135 dead transitions. [2024-11-08 17:51:11,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 135 transitions, 771 flow [2024-11-08 17:51:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 17:51:11,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 17:51:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 323 transitions. [2024-11-08 17:51:11,766 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5474576271186441 [2024-11-08 17:51:11,766 INFO L175 Difference]: Start difference. First operand has 77 places, 64 transitions, 300 flow. Second operand 10 states and 323 transitions. [2024-11-08 17:51:11,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 135 transitions, 771 flow [2024-11-08 17:51:11,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 135 transitions, 758 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-08 17:51:11,786 INFO L231 Difference]: Finished difference. Result has 85 places, 68 transitions, 353 flow [2024-11-08 17:51:11,786 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=353, PETRI_PLACES=85, PETRI_TRANSITIONS=68} [2024-11-08 17:51:11,790 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 26 predicate places. [2024-11-08 17:51:11,790 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 68 transitions, 353 flow [2024-11-08 17:51:11,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 23.904761904761905) internal successors, (502), 21 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:11,791 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:51:11,791 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:51:11,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 17:51:11,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:51:11,996 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-08 17:51:11,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:51:11,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1990932220, now seen corresponding path program 2 times [2024-11-08 17:51:11,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:51:11,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772200304] [2024-11-08 17:51:11,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:51:11,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:51:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:51:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:51:12,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:51:12,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772200304] [2024-11-08 17:51:12,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772200304] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:51:12,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922874403] [2024-11-08 17:51:12,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:51:12,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:51:12,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:51:12,402 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:51:12,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 17:51:12,515 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:51:12,515 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:51:12,517 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-08 17:51:12,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:51:12,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 17:51:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:51:12,786 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:51:13,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:51:13,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922874403] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:51:13,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:51:13,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2024-11-08 17:51:13,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345862085] [2024-11-08 17:51:13,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:51:13,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 17:51:13,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:51:13,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 17:51:13,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2024-11-08 17:51:13,846 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 59 [2024-11-08 17:51:13,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 68 transitions, 353 flow. Second operand has 21 states, 21 states have (on average 23.19047619047619) internal successors, (487), 21 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:13,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:51:13,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 59 [2024-11-08 17:51:13,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:51:15,010 INFO L124 PetriNetUnfolderBase]: 1739/3056 cut-off events. [2024-11-08 17:51:15,011 INFO L125 PetriNetUnfolderBase]: For 5280/5309 co-relation queries the response was YES. [2024-11-08 17:51:15,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9198 conditions, 3056 events. 1739/3056 cut-off events. For 5280/5309 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 18291 event pairs, 588 based on Foata normal form. 56/3017 useless extension candidates. Maximal degree in co-relation 7213. Up to 877 conditions per place. [2024-11-08 17:51:15,057 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 107 selfloop transitions, 14 changer transitions 0/143 dead transitions. [2024-11-08 17:51:15,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 143 transitions, 963 flow [2024-11-08 17:51:15,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 17:51:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 17:51:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 309 transitions. [2024-11-08 17:51:15,060 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.523728813559322 [2024-11-08 17:51:15,060 INFO L175 Difference]: Start difference. First operand has 85 places, 68 transitions, 353 flow. Second operand 10 states and 309 transitions. [2024-11-08 17:51:15,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 143 transitions, 963 flow [2024-11-08 17:51:15,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 143 transitions, 885 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-11-08 17:51:15,084 INFO L231 Difference]: Finished difference. Result has 91 places, 72 transitions, 386 flow [2024-11-08 17:51:15,085 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=386, PETRI_PLACES=91, PETRI_TRANSITIONS=72} [2024-11-08 17:51:15,085 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 32 predicate places. [2024-11-08 17:51:15,086 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 72 transitions, 386 flow [2024-11-08 17:51:15,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 23.19047619047619) internal successors, (487), 21 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:15,086 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:51:15,087 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:51:15,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 17:51:15,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:51:15,291 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-08 17:51:15,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:51:15,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1142311944, now seen corresponding path program 3 times [2024-11-08 17:51:15,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:51:15,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029490149] [2024-11-08 17:51:15,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:51:15,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:51:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:51:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:51:15,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:51:15,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029490149] [2024-11-08 17:51:15,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029490149] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:51:15,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610700282] [2024-11-08 17:51:15,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 17:51:15,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:51:15,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:51:15,513 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:51:15,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 17:51:15,629 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-08 17:51:15,629 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:51:15,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 17:51:15,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:51:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 17:51:15,874 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:51:16,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-08 17:51:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 17:51:16,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610700282] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:51:16,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:51:16,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2024-11-08 17:51:16,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50713456] [2024-11-08 17:51:16,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:51:16,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-08 17:51:16,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:51:16,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-08 17:51:16,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-11-08 17:51:17,359 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 59 [2024-11-08 17:51:17,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 72 transitions, 386 flow. Second operand has 22 states, 22 states have (on average 19.727272727272727) internal successors, (434), 22 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:17,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:51:17,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 59 [2024-11-08 17:51:17,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:51:20,694 INFO L124 PetriNetUnfolderBase]: 5414/8213 cut-off events. [2024-11-08 17:51:20,695 INFO L125 PetriNetUnfolderBase]: For 15477/15491 co-relation queries the response was YES. [2024-11-08 17:51:20,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27793 conditions, 8213 events. 5414/8213 cut-off events. For 15477/15491 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 49687 event pairs, 847 based on Foata normal form. 112/8249 useless extension candidates. Maximal degree in co-relation 13690. Up to 1569 conditions per place. [2024-11-08 17:51:20,783 INFO L140 encePairwiseOnDemand]: 47/59 looper letters, 305 selfloop transitions, 44 changer transitions 0/359 dead transitions. [2024-11-08 17:51:20,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 359 transitions, 2719 flow [2024-11-08 17:51:20,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-08 17:51:20,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-08 17:51:20,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 624 transitions. [2024-11-08 17:51:20,787 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45983787767133383 [2024-11-08 17:51:20,787 INFO L175 Difference]: Start difference. First operand has 91 places, 72 transitions, 386 flow. Second operand 23 states and 624 transitions. [2024-11-08 17:51:20,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 359 transitions, 2719 flow [2024-11-08 17:51:20,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 359 transitions, 2465 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-11-08 17:51:20,833 INFO L231 Difference]: Finished difference. Result has 113 places, 94 transitions, 636 flow [2024-11-08 17:51:20,833 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=636, PETRI_PLACES=113, PETRI_TRANSITIONS=94} [2024-11-08 17:51:20,834 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 54 predicate places. [2024-11-08 17:51:20,834 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 94 transitions, 636 flow [2024-11-08 17:51:20,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 19.727272727272727) internal successors, (434), 22 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:20,835 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:51:20,835 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:51:20,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 17:51:21,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:51:21,036 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-08 17:51:21,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:51:21,038 INFO L85 PathProgramCache]: Analyzing trace with hash 821785784, now seen corresponding path program 3 times [2024-11-08 17:51:21,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:51:21,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561261920] [2024-11-08 17:51:21,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:51:21,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:51:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:51:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:51:21,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:51:21,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561261920] [2024-11-08 17:51:21,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561261920] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:51:21,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479406548] [2024-11-08 17:51:21,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 17:51:21,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:51:21,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:51:21,262 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:51:21,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 17:51:21,369 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-08 17:51:21,370 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:51:21,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 17:51:21,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:51:21,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 17:51:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 17:51:21,624 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:51:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 17:51:22,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479406548] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:51:22,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:51:22,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2024-11-08 17:51:22,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891579773] [2024-11-08 17:51:22,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:51:22,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-08 17:51:22,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:51:22,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-08 17:51:22,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-11-08 17:51:23,106 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 59 [2024-11-08 17:51:23,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 94 transitions, 636 flow. Second operand has 23 states, 23 states have (on average 20.043478260869566) internal successors, (461), 23 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:23,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:51:23,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 59 [2024-11-08 17:51:23,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:51:25,392 INFO L124 PetriNetUnfolderBase]: 4869/7203 cut-off events. [2024-11-08 17:51:25,392 INFO L125 PetriNetUnfolderBase]: For 27986/29118 co-relation queries the response was YES. [2024-11-08 17:51:25,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27731 conditions, 7203 events. 4869/7203 cut-off events. For 27986/29118 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 40991 event pairs, 655 based on Foata normal form. 292/7376 useless extension candidates. Maximal degree in co-relation 14605. Up to 1064 conditions per place. [2024-11-08 17:51:25,490 INFO L140 encePairwiseOnDemand]: 47/59 looper letters, 298 selfloop transitions, 44 changer transitions 0/361 dead transitions. [2024-11-08 17:51:25,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 361 transitions, 3213 flow [2024-11-08 17:51:25,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-08 17:51:25,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-08 17:51:25,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 596 transitions. [2024-11-08 17:51:25,495 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4392041267501842 [2024-11-08 17:51:25,495 INFO L175 Difference]: Start difference. First operand has 113 places, 94 transitions, 636 flow. Second operand 23 states and 596 transitions. [2024-11-08 17:51:25,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 361 transitions, 3213 flow [2024-11-08 17:51:25,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 361 transitions, 3062 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-11-08 17:51:25,579 INFO L231 Difference]: Finished difference. Result has 135 places, 113 transitions, 856 flow [2024-11-08 17:51:25,580 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=856, PETRI_PLACES=135, PETRI_TRANSITIONS=113} [2024-11-08 17:51:25,581 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 76 predicate places. [2024-11-08 17:51:25,582 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 113 transitions, 856 flow [2024-11-08 17:51:25,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 20.043478260869566) internal successors, (461), 23 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:25,583 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:51:25,583 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:51:25,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 17:51:25,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 17:51:25,788 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-08 17:51:25,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:51:25,790 INFO L85 PathProgramCache]: Analyzing trace with hash -393441478, now seen corresponding path program 1 times [2024-11-08 17:51:25,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:51:25,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867629321] [2024-11-08 17:51:25,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:51:25,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:51:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:51:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:51:25,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:51:25,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867629321] [2024-11-08 17:51:25,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867629321] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:51:25,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:51:25,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:51:25,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36355107] [2024-11-08 17:51:25,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:51:25,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:51:25,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:51:25,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:51:25,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:51:25,917 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 59 [2024-11-08 17:51:25,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 113 transitions, 856 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:25,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:51:25,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 59 [2024-11-08 17:51:25,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:51:26,996 INFO L124 PetriNetUnfolderBase]: 3107/5528 cut-off events. [2024-11-08 17:51:26,996 INFO L125 PetriNetUnfolderBase]: For 20252/20394 co-relation queries the response was YES. [2024-11-08 17:51:27,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22692 conditions, 5528 events. 3107/5528 cut-off events. For 20252/20394 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 37133 event pairs, 1287 based on Foata normal form. 308/5643 useless extension candidates. Maximal degree in co-relation 11864. Up to 3533 conditions per place. [2024-11-08 17:51:27,051 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 97 selfloop transitions, 9 changer transitions 0/135 dead transitions. [2024-11-08 17:51:27,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 135 transitions, 1255 flow [2024-11-08 17:51:27,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:51:27,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:51:27,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-11-08 17:51:27,052 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5466101694915254 [2024-11-08 17:51:27,052 INFO L175 Difference]: Start difference. First operand has 135 places, 113 transitions, 856 flow. Second operand 4 states and 129 transitions. [2024-11-08 17:51:27,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 135 transitions, 1255 flow [2024-11-08 17:51:27,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 135 transitions, 1198 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-11-08 17:51:27,169 INFO L231 Difference]: Finished difference. Result has 126 places, 104 transitions, 767 flow [2024-11-08 17:51:27,170 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=767, PETRI_PLACES=126, PETRI_TRANSITIONS=104} [2024-11-08 17:51:27,170 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 67 predicate places. [2024-11-08 17:51:27,171 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 104 transitions, 767 flow [2024-11-08 17:51:27,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:27,171 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:51:27,171 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:51:27,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-08 17:51:27,172 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-08 17:51:27,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:51:27,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1651816490, now seen corresponding path program 1 times [2024-11-08 17:51:27,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:51:27,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10216609] [2024-11-08 17:51:27,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:51:27,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:51:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:51:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:51:27,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:51:27,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10216609] [2024-11-08 17:51:27,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10216609] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:51:27,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:51:27,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:51:27,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518458963] [2024-11-08 17:51:27,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:51:27,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:51:27,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:51:27,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:51:27,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:51:27,285 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 59 [2024-11-08 17:51:27,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 104 transitions, 767 flow. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:27,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:51:27,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 59 [2024-11-08 17:51:27,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:51:28,122 INFO L124 PetriNetUnfolderBase]: 2891/5000 cut-off events. [2024-11-08 17:51:28,123 INFO L125 PetriNetUnfolderBase]: For 18946/19298 co-relation queries the response was YES. [2024-11-08 17:51:28,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20205 conditions, 5000 events. 2891/5000 cut-off events. For 18946/19298 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 32610 event pairs, 1469 based on Foata normal form. 252/5133 useless extension candidates. Maximal degree in co-relation 10479. Up to 3397 conditions per place. [2024-11-08 17:51:28,164 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 90 selfloop transitions, 9 changer transitions 0/122 dead transitions. [2024-11-08 17:51:28,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 122 transitions, 1114 flow [2024-11-08 17:51:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:51:28,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:51:28,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-11-08 17:51:28,166 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5423728813559322 [2024-11-08 17:51:28,166 INFO L175 Difference]: Start difference. First operand has 126 places, 104 transitions, 767 flow. Second operand 4 states and 128 transitions. [2024-11-08 17:51:28,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 122 transitions, 1114 flow [2024-11-08 17:51:28,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 122 transitions, 1082 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 17:51:28,352 INFO L231 Difference]: Finished difference. Result has 122 places, 95 transitions, 696 flow [2024-11-08 17:51:28,353 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=696, PETRI_PLACES=122, PETRI_TRANSITIONS=95} [2024-11-08 17:51:28,353 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 63 predicate places. [2024-11-08 17:51:28,354 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 95 transitions, 696 flow [2024-11-08 17:51:28,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:28,354 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:51:28,355 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:51:28,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-08 17:51:28,355 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-08 17:51:28,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:51:28,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1699538342, now seen corresponding path program 1 times [2024-11-08 17:51:28,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:51:28,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449616410] [2024-11-08 17:51:28,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:51:28,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:51:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:51:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:51:28,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:51:28,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449616410] [2024-11-08 17:51:28,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449616410] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:51:28,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560458647] [2024-11-08 17:51:28,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:51:28,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:51:28,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:51:28,875 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:51:28,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 17:51:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:51:29,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-08 17:51:29,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:51:29,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-08 17:51:29,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-08 17:51:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:51:29,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:51:30,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 116 [2024-11-08 17:51:30,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 112 [2024-11-08 17:51:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:51:30,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560458647] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:51:30,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:51:30,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 7] total 18 [2024-11-08 17:51:30,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907562471] [2024-11-08 17:51:30,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:51:30,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-08 17:51:30,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:51:30,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-08 17:51:30,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-11-08 17:51:31,170 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2024-11-08 17:51:31,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 95 transitions, 696 flow. Second operand has 18 states, 18 states have (on average 27.11111111111111) internal successors, (488), 18 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:31,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:51:31,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2024-11-08 17:51:31,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:51:32,990 INFO L124 PetriNetUnfolderBase]: 3299/5940 cut-off events. [2024-11-08 17:51:32,991 INFO L125 PetriNetUnfolderBase]: For 23258/24146 co-relation queries the response was YES. [2024-11-08 17:51:33,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23388 conditions, 5940 events. 3299/5940 cut-off events. For 23258/24146 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 40616 event pairs, 279 based on Foata normal form. 7/5840 useless extension candidates. Maximal degree in co-relation 12094. Up to 746 conditions per place. [2024-11-08 17:51:33,016 INFO L140 encePairwiseOnDemand]: 46/59 looper letters, 0 selfloop transitions, 0 changer transitions 347/347 dead transitions. [2024-11-08 17:51:33,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 347 transitions, 3223 flow [2024-11-08 17:51:33,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-08 17:51:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-08 17:51:33,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 677 transitions. [2024-11-08 17:51:33,020 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5215716486902927 [2024-11-08 17:51:33,020 INFO L175 Difference]: Start difference. First operand has 122 places, 95 transitions, 696 flow. Second operand 22 states and 677 transitions. [2024-11-08 17:51:33,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 347 transitions, 3223 flow [2024-11-08 17:51:33,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 347 transitions, 3153 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 17:51:33,106 INFO L231 Difference]: Finished difference. Result has 138 places, 0 transitions, 0 flow [2024-11-08 17:51:33,106 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=0, PETRI_PLACES=138, PETRI_TRANSITIONS=0} [2024-11-08 17:51:33,107 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 79 predicate places. [2024-11-08 17:51:33,107 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 0 transitions, 0 flow [2024-11-08 17:51:33,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 27.11111111111111) internal successors, (488), 18 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:51:33,111 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 27 remaining) [2024-11-08 17:51:33,111 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 27 remaining) [2024-11-08 17:51:33,112 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 27 remaining) [2024-11-08 17:51:33,112 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 27 remaining) [2024-11-08 17:51:33,112 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 27 remaining) [2024-11-08 17:51:33,112 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 27 remaining) [2024-11-08 17:51:33,113 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 27 remaining) [2024-11-08 17:51:33,113 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 27 remaining) [2024-11-08 17:51:33,113 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 27 remaining) [2024-11-08 17:51:33,113 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 27 remaining) [2024-11-08 17:51:33,113 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 27 remaining) [2024-11-08 17:51:33,113 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 27 remaining) [2024-11-08 17:51:33,114 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 27 remaining) [2024-11-08 17:51:33,114 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 27 remaining) [2024-11-08 17:51:33,114 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (12 of 27 remaining) [2024-11-08 17:51:33,114 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (11 of 27 remaining) [2024-11-08 17:51:33,115 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 27 remaining) [2024-11-08 17:51:33,115 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 27 remaining) [2024-11-08 17:51:33,115 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 27 remaining) [2024-11-08 17:51:33,115 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 27 remaining) [2024-11-08 17:51:33,115 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 27 remaining) [2024-11-08 17:51:33,116 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 27 remaining) [2024-11-08 17:51:33,116 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 27 remaining) [2024-11-08 17:51:33,116 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 27 remaining) [2024-11-08 17:51:33,116 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 27 remaining) [2024-11-08 17:51:33,117 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 27 remaining) [2024-11-08 17:51:33,117 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 27 remaining) [2024-11-08 17:51:33,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-08 17:51:33,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-08 17:51:33,321 INFO L407 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:51:33,330 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-08 17:51:33,330 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-08 17:51:33,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.11 05:51:33 BasicIcfg [2024-11-08 17:51:33,339 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-08 17:51:33,340 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-08 17:51:33,340 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-08 17:51:33,341 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-08 17:51:33,341 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:50:56" (3/4) ... [2024-11-08 17:51:33,344 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-08 17:51:33,350 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2024-11-08 17:51:33,351 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2024-11-08 17:51:33,351 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2024-11-08 17:51:33,359 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 90 nodes and edges [2024-11-08 17:51:33,360 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2024-11-08 17:51:33,363 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2024-11-08 17:51:33,363 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2024-11-08 17:51:33,523 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/witness.graphml [2024-11-08 17:51:33,523 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/witness.yml [2024-11-08 17:51:33,523 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-08 17:51:33,525 INFO L158 Benchmark]: Toolchain (without parser) took 38937.82ms. Allocated memory was 142.6MB in the beginning and 843.1MB in the end (delta: 700.4MB). Free memory was 100.0MB in the beginning and 432.0MB in the end (delta: -331.9MB). Peak memory consumption was 369.9MB. Max. memory is 16.1GB. [2024-11-08 17:51:33,526 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 142.6MB. Free memory is still 89.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-08 17:51:33,526 INFO L158 Benchmark]: CACSL2BoogieTranslator took 396.04ms. Allocated memory is still 142.6MB. Free memory was 99.8MB in the beginning and 86.1MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-11-08 17:51:33,526 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.88ms. Allocated memory is still 142.6MB. Free memory was 86.1MB in the beginning and 84.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-08 17:51:33,527 INFO L158 Benchmark]: Boogie Preprocessor took 56.55ms. Allocated memory is still 142.6MB. Free memory was 84.4MB in the beginning and 81.7MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-08 17:51:33,527 INFO L158 Benchmark]: RCFGBuilder took 1271.75ms. Allocated memory was 142.6MB in the beginning and 186.6MB in the end (delta: 44.0MB). Free memory was 81.7MB in the beginning and 129.6MB in the end (delta: -47.9MB). Peak memory consumption was 22.1MB. Max. memory is 16.1GB. [2024-11-08 17:51:33,528 INFO L158 Benchmark]: TraceAbstraction took 36965.76ms. Allocated memory was 186.6MB in the beginning and 843.1MB in the end (delta: 656.4MB). Free memory was 128.8MB in the beginning and 437.2MB in the end (delta: -308.4MB). Peak memory consumption was 507.1MB. Max. memory is 16.1GB. [2024-11-08 17:51:33,528 INFO L158 Benchmark]: Witness Printer took 184.09ms. Allocated memory is still 843.1MB. Free memory was 437.2MB in the beginning and 432.0MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-08 17:51:33,531 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 142.6MB. Free memory is still 89.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 396.04ms. Allocated memory is still 142.6MB. Free memory was 99.8MB in the beginning and 86.1MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.88ms. Allocated memory is still 142.6MB. Free memory was 86.1MB in the beginning and 84.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 56.55ms. Allocated memory is still 142.6MB. Free memory was 84.4MB in the beginning and 81.7MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1271.75ms. Allocated memory was 142.6MB in the beginning and 186.6MB in the end (delta: 44.0MB). Free memory was 81.7MB in the beginning and 129.6MB in the end (delta: -47.9MB). Peak memory consumption was 22.1MB. Max. memory is 16.1GB. * TraceAbstraction took 36965.76ms. Allocated memory was 186.6MB in the beginning and 843.1MB in the end (delta: 656.4MB). Free memory was 128.8MB in the beginning and 437.2MB in the end (delta: -308.4MB). Peak memory consumption was 507.1MB. Max. memory is 16.1GB. * Witness Printer took 184.09ms. Allocated memory is still 843.1MB. Free memory was 437.2MB in the beginning and 432.0MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 78]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 83 locations, 27 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 36.8s, OverallIterations: 16, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 22.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3136 SdHoareTripleChecker+Valid, 10.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2874 mSDsluCounter, 2162 SdHoareTripleChecker+Invalid, 9.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2077 mSDsCounter, 124 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10213 IncrementalHoareTripleChecker+Invalid, 10337 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 124 mSolverCounterUnsat, 85 mSDtfsCounter, 10213 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 506 GetRequests, 273 SyntacticMatches, 4 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 4.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=856occurred in iteration=13, InterpolantAutomatonStates: 153, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 10.5s InterpolantComputationTime, 471 NumberOfCodeBlocks, 457 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 614 ConstructedInterpolants, 2 QuantifiedInterpolants, 6428 SizeOfPredicates, 54 NumberOfNonLiveVariables, 1258 ConjunctsInSsa, 141 ConjunctsInUnsatCore, 35 InterpolantComputations, 8 PerfectInterpolantSequences, 82/189 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 16 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-08 17:51:33,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_669c3a80-9793-4038-b8c7-79758d4a4aa1/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE