./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya --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 0d0975dc4466296431d96c26938a2e71864de63aba998f18ecd8a32ca341796b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:44:05,195 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:44:05,258 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 05:44:05,262 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:44:05,263 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:44:05,287 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:44:05,288 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:44:05,288 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:44:05,289 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:44:05,289 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:44:05,290 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:44:05,290 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:44:05,291 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:44:05,291 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:44:05,292 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:44:05,292 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:44:05,293 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:44:05,293 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:44:05,294 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:44:05,294 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:44:05,295 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 05:44:05,296 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 05:44:05,296 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 05:44:05,296 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:44:05,297 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 05:44:05,297 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 05:44:05,298 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:44:05,298 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:44:05,298 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:44:05,299 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:44:05,299 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:44:05,300 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:44:05,300 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:44:05,300 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:44:05,300 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:44:05,301 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:44:05,301 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:44:05,301 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:44:05,301 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:44:05,301 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:44:05,302 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:44:05,302 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_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d0975dc4466296431d96c26938a2e71864de63aba998f18ecd8a32ca341796b [2023-11-29 05:44:05,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:44:05,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:44:05,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:44:05,533 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:44:05,533 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:44:05,535 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2023-11-29 05:44:08,287 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:44:08,456 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:44:08,457 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2023-11-29 05:44:08,466 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/data/ee8f4a44e/9ada99f97c1b4555af1b8e632ad352f5/FLAG5aa452635 [2023-11-29 05:44:08,478 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/data/ee8f4a44e/9ada99f97c1b4555af1b8e632ad352f5 [2023-11-29 05:44:08,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:44:08,482 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:44:08,483 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:44:08,483 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:44:08,488 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:44:08,488 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:44:08" (1/1) ... [2023-11-29 05:44:08,489 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f33ea65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:08, skipping insertion in model container [2023-11-29 05:44:08,490 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:44:08" (1/1) ... [2023-11-29 05:44:08,517 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:44:08,706 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:44:08,717 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:44:08,763 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:44:08,779 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:44:08,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:08 WrapperNode [2023-11-29 05:44:08,779 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:44:08,780 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:44:08,780 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:44:08,781 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:44:08,786 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:08" (1/1) ... [2023-11-29 05:44:08,800 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:08" (1/1) ... [2023-11-29 05:44:08,847 INFO L138 Inliner]: procedures = 26, calls = 77, calls flagged for inlining = 29, calls inlined = 43, statements flattened = 608 [2023-11-29 05:44:08,848 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:44:08,849 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:44:08,849 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:44:08,849 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:44:08,858 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:08" (1/1) ... [2023-11-29 05:44:08,859 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:08" (1/1) ... [2023-11-29 05:44:08,866 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:08" (1/1) ... [2023-11-29 05:44:08,895 INFO L175 MemorySlicer]: Split 35 memory accesses to 5 slices as follows [2, 2, 2, 2, 27]. 77 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 1, 1, 3]. [2023-11-29 05:44:08,895 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:08" (1/1) ... [2023-11-29 05:44:08,895 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:08" (1/1) ... [2023-11-29 05:44:08,916 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:08" (1/1) ... [2023-11-29 05:44:08,923 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:08" (1/1) ... [2023-11-29 05:44:08,927 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:08" (1/1) ... [2023-11-29 05:44:08,931 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:08" (1/1) ... [2023-11-29 05:44:08,939 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:44:08,940 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:44:08,940 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:44:08,940 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:44:08,941 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:08" (1/1) ... [2023-11-29 05:44:08,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:44:08,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:44:08,975 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:44:08,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:44:09,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:44:09,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:44:09,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:44:09,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:44:09,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 05:44:09,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 05:44:09,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 05:44:09,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:44:09,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:44:09,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 05:44:09,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 05:44:09,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 05:44:09,017 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 05:44:09,017 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 05:44:09,017 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 05:44:09,017 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 05:44:09,017 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 05:44:09,018 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 05:44:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:44:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:44:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 05:44:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 05:44:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 05:44:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:44:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:44:09,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:44:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:44:09,021 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 05:44:09,161 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:44:09,163 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:44:09,980 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:44:10,723 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:44:10,723 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-29 05:44:10,724 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:44:10 BoogieIcfgContainer [2023-11-29 05:44:10,724 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:44:10,727 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:44:10,727 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:44:10,730 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:44:10,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:44:08" (1/3) ... [2023-11-29 05:44:10,731 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77abd490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:44:10, skipping insertion in model container [2023-11-29 05:44:10,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:08" (2/3) ... [2023-11-29 05:44:10,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77abd490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:44:10, skipping insertion in model container [2023-11-29 05:44:10,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:44:10" (3/3) ... [2023-11-29 05:44:10,733 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-trans.wvr.c [2023-11-29 05:44:10,752 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:44:10,752 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 68 error locations. [2023-11-29 05:44:10,753 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:44:10,886 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 05:44:10,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 206 transitions, 433 flow [2023-11-29 05:44:11,002 INFO L124 PetriNetUnfolderBase]: 30/203 cut-off events. [2023-11-29 05:44:11,002 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 05:44:11,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 203 events. 30/203 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 773 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 171. Up to 2 conditions per place. [2023-11-29 05:44:11,010 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 206 transitions, 433 flow [2023-11-29 05:44:11,020 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 202 transitions, 422 flow [2023-11-29 05:44:11,029 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:44:11,036 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@74162e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:44:11,036 INFO L358 AbstractCegarLoop]: Starting to check reachability of 119 error locations. [2023-11-29 05:44:11,039 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:44:11,040 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-29 05:44:11,040 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 05:44:11,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:44:11,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 05:44:11,041 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-11-29 05:44:11,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:11,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1902651, now seen corresponding path program 1 times [2023-11-29 05:44:11,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:44:11,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680409880] [2023-11-29 05:44:11,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:11,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:44:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:11,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:44:11,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680409880] [2023-11-29 05:44:11,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680409880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:44:11,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:44:11,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:44:11,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515058568] [2023-11-29 05:44:11,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:44:11,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:44:11,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:44:11,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:44:11,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:44:11,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 206 [2023-11-29 05:44:11,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 202 transitions, 422 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:11,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:44:11,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 206 [2023-11-29 05:44:11,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:44:19,830 INFO L124 PetriNetUnfolderBase]: 43548/78446 cut-off events. [2023-11-29 05:44:19,831 INFO L125 PetriNetUnfolderBase]: For 1121/1121 co-relation queries the response was YES. [2023-11-29 05:44:20,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134925 conditions, 78446 events. 43548/78446 cut-off events. For 1121/1121 co-relation queries the response was YES. Maximal size of possible extension queue 1946. Compared 742283 event pairs, 25611 based on Foata normal form. 1798/64603 useless extension candidates. Maximal degree in co-relation 131831. Up to 55620 conditions per place. [2023-11-29 05:44:20,613 INFO L140 encePairwiseOnDemand]: 197/206 looper letters, 81 selfloop transitions, 2 changer transitions 0/194 dead transitions. [2023-11-29 05:44:20,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 194 transitions, 572 flow [2023-11-29 05:44:20,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:44:20,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:44:20,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2023-11-29 05:44:20,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7038834951456311 [2023-11-29 05:44:20,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2023-11-29 05:44:20,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2023-11-29 05:44:20,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:44:20,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2023-11-29 05:44:20,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:20,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:20,642 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:20,644 INFO L175 Difference]: Start difference. First operand has 182 places, 202 transitions, 422 flow. Second operand 3 states and 435 transitions. [2023-11-29 05:44:20,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 194 transitions, 572 flow [2023-11-29 05:44:20,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 194 transitions, 560 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 05:44:20,658 INFO L231 Difference]: Finished difference. Result has 173 places, 194 transitions, 398 flow [2023-11-29 05:44:20,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=398, PETRI_PLACES=173, PETRI_TRANSITIONS=194} [2023-11-29 05:44:20,662 INFO L281 CegarLoopForPetriNet]: 182 programPoint places, -9 predicate places. [2023-11-29 05:44:20,663 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 194 transitions, 398 flow [2023-11-29 05:44:20,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:20,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:44:20,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 05:44:20,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:44:20,664 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-11-29 05:44:20,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:20,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1902652, now seen corresponding path program 1 times [2023-11-29 05:44:20,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:44:20,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693803114] [2023-11-29 05:44:20,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:20,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:44:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:20,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:44:20,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693803114] [2023-11-29 05:44:20,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693803114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:44:20,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:44:20,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:44:20,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429855469] [2023-11-29 05:44:20,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:44:20,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:44:20,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:44:20,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:44:20,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:44:21,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 206 [2023-11-29 05:44:21,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 194 transitions, 398 flow. Second operand has 4 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:21,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:44:21,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 206 [2023-11-29 05:44:21,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:44:28,031 INFO L124 PetriNetUnfolderBase]: 43548/78452 cut-off events. [2023-11-29 05:44:28,031 INFO L125 PetriNetUnfolderBase]: For 279/279 co-relation queries the response was YES. [2023-11-29 05:44:28,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134377 conditions, 78452 events. 43548/78452 cut-off events. For 279/279 co-relation queries the response was YES. Maximal size of possible extension queue 1948. Compared 742325 event pairs, 25611 based on Foata normal form. 1/62810 useless extension candidates. Maximal degree in co-relation 134334. Up to 55632 conditions per place. [2023-11-29 05:44:28,468 INFO L140 encePairwiseOnDemand]: 196/206 looper letters, 86 selfloop transitions, 6 changer transitions 0/200 dead transitions. [2023-11-29 05:44:28,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 200 transitions, 594 flow [2023-11-29 05:44:28,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:44:28,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:44:28,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-11-29 05:44:28,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7168284789644013 [2023-11-29 05:44:28,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-11-29 05:44:28,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-11-29 05:44:28,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:44:28,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-11-29 05:44:28,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:28,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:28,479 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:28,479 INFO L175 Difference]: Start difference. First operand has 173 places, 194 transitions, 398 flow. Second operand 3 states and 443 transitions. [2023-11-29 05:44:28,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 200 transitions, 594 flow [2023-11-29 05:44:28,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 200 transitions, 590 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:44:28,485 INFO L231 Difference]: Finished difference. Result has 174 places, 197 transitions, 432 flow [2023-11-29 05:44:28,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=174, PETRI_TRANSITIONS=197} [2023-11-29 05:44:28,486 INFO L281 CegarLoopForPetriNet]: 182 programPoint places, -8 predicate places. [2023-11-29 05:44:28,486 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 197 transitions, 432 flow [2023-11-29 05:44:28,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:28,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:44:28,487 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-29 05:44:28,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:44:28,488 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-11-29 05:44:28,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:28,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1828511870, now seen corresponding path program 1 times [2023-11-29 05:44:28,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:44:28,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974024638] [2023-11-29 05:44:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:28,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:44:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:28,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:44:28,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974024638] [2023-11-29 05:44:28,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974024638] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:44:28,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096500064] [2023-11-29 05:44:28,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:28,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:44:28,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:44:28,700 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:44:28,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:44:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:28,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:44:28,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:28,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 05:44:28,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:28,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 05:44:28,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:28,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 05:44:28,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:28,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:44:28,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:28,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 05:44:28,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:28,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:44:28,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:28,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 05:44:28,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:28,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:44:28,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:28,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:44:28,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:28,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:44:29,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:29,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:44:29,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:29,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:44:29,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:29,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 05:44:29,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:29,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:44:29,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:29,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:44:29,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:29,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:44:29,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:29,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:44:29,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:29,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:44:29,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:29,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:44:29,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:29,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 05:44:29,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:29,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:44:29,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:29,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:44:29,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:29,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:44:29,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:29,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:44:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:29,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:44:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:29,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096500064] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:44:29,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:44:29,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-29 05:44:29,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938757729] [2023-11-29 05:44:29,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:44:29,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:44:29,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:44:29,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:44:29,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:44:29,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 206 [2023-11-29 05:44:29,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 197 transitions, 432 flow. Second operand has 9 states, 9 states have (on average 116.66666666666667) internal successors, (1050), 9 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:29,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:44:29,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 206 [2023-11-29 05:44:29,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:44:37,516 INFO L124 PetriNetUnfolderBase]: 43554/78476 cut-off events. [2023-11-29 05:44:37,516 INFO L125 PetriNetUnfolderBase]: For 279/279 co-relation queries the response was YES. [2023-11-29 05:44:37,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134455 conditions, 78476 events. 43554/78476 cut-off events. For 279/279 co-relation queries the response was YES. Maximal size of possible extension queue 1948. Compared 742387 event pairs, 25611 based on Foata normal form. 3/62838 useless extension candidates. Maximal degree in co-relation 134366. Up to 55634 conditions per place. [2023-11-29 05:44:37,970 INFO L140 encePairwiseOnDemand]: 196/206 looper letters, 95 selfloop transitions, 21 changer transitions 0/224 dead transitions. [2023-11-29 05:44:37,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 224 transitions, 752 flow [2023-11-29 05:44:37,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:44:37,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:44:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 818 transitions. [2023-11-29 05:44:37,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6618122977346278 [2023-11-29 05:44:37,974 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 818 transitions. [2023-11-29 05:44:37,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 818 transitions. [2023-11-29 05:44:37,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:44:37,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 818 transitions. [2023-11-29 05:44:37,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.33333333333334) internal successors, (818), 6 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:37,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 206.0) internal successors, (1442), 7 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:37,980 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 206.0) internal successors, (1442), 7 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:37,980 INFO L175 Difference]: Start difference. First operand has 174 places, 197 transitions, 432 flow. Second operand 6 states and 818 transitions. [2023-11-29 05:44:37,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 224 transitions, 752 flow [2023-11-29 05:44:37,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 224 transitions, 742 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:44:37,988 INFO L231 Difference]: Finished difference. Result has 181 places, 212 transitions, 578 flow [2023-11-29 05:44:37,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=578, PETRI_PLACES=181, PETRI_TRANSITIONS=212} [2023-11-29 05:44:37,989 INFO L281 CegarLoopForPetriNet]: 182 programPoint places, -1 predicate places. [2023-11-29 05:44:37,989 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 212 transitions, 578 flow [2023-11-29 05:44:37,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 116.66666666666667) internal successors, (1050), 9 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:37,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:44:37,990 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-29 05:44:37,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:44:38,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 05:44:38,191 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-11-29 05:44:38,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:38,192 INFO L85 PathProgramCache]: Analyzing trace with hash -585714108, now seen corresponding path program 2 times [2023-11-29 05:44:38,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:44:38,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720127014] [2023-11-29 05:44:38,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:38,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:44:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:38,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:44:38,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720127014] [2023-11-29 05:44:38,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720127014] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:44:38,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103293935] [2023-11-29 05:44:38,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:44:38,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:44:38,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:44:38,572 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:44:38,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:44:38,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:44:38,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:44:38,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 05:44:38,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:38,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 05:44:38,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:38,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:44:38,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:38,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 05:44:38,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:38,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:44:38,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:38,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:44:38,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:38,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:44:38,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:38,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:44:38,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:38,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 05:44:38,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:38,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 05:44:38,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:38,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 05:44:38,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:38,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 05:44:38,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:38,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:44:38,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:38,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:44:38,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:38,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:44:38,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:38,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 05:44:38,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:38,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:44:38,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:38,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:44:38,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:38,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:44:38,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:38,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 05:44:39,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:39,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:44:39,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:39,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:44:39,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:39,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:44:39,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:39,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:44:39,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:39,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:44:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:39,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:44:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:39,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103293935] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:44:39,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:44:39,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2023-11-29 05:44:39,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786000494] [2023-11-29 05:44:39,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:44:39,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:44:39,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:44:39,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:44:39,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:44:42,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 206 [2023-11-29 05:44:42,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 212 transitions, 578 flow. Second operand has 18 states, 18 states have (on average 116.83333333333333) internal successors, (2103), 18 states have internal predecessors, (2103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:42,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:44:42,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 206 [2023-11-29 05:44:42,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:44:50,335 INFO L124 PetriNetUnfolderBase]: 43557/78485 cut-off events. [2023-11-29 05:44:50,335 INFO L125 PetriNetUnfolderBase]: For 351/351 co-relation queries the response was YES. [2023-11-29 05:44:50,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134534 conditions, 78485 events. 43557/78485 cut-off events. For 351/351 co-relation queries the response was YES. Maximal size of possible extension queue 1948. Compared 742114 event pairs, 25611 based on Foata normal form. 3/62850 useless extension candidates. Maximal degree in co-relation 134398. Up to 55635 conditions per place. [2023-11-29 05:44:50,843 INFO L140 encePairwiseOnDemand]: 196/206 looper letters, 98 selfloop transitions, 27 changer transitions 0/233 dead transitions. [2023-11-29 05:44:50,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 233 transitions, 894 flow [2023-11-29 05:44:50,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:44:50,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:44:50,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 933 transitions. [2023-11-29 05:44:50,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470180305131762 [2023-11-29 05:44:50,846 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 933 transitions. [2023-11-29 05:44:50,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 933 transitions. [2023-11-29 05:44:50,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:44:50,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 933 transitions. [2023-11-29 05:44:50,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:50,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:50,853 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:50,853 INFO L175 Difference]: Start difference. First operand has 181 places, 212 transitions, 578 flow. Second operand 7 states and 933 transitions. [2023-11-29 05:44:50,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 233 transitions, 894 flow [2023-11-29 05:44:50,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 233 transitions, 860 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-11-29 05:44:50,861 INFO L231 Difference]: Finished difference. Result has 187 places, 218 transitions, 657 flow [2023-11-29 05:44:50,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=657, PETRI_PLACES=187, PETRI_TRANSITIONS=218} [2023-11-29 05:44:50,862 INFO L281 CegarLoopForPetriNet]: 182 programPoint places, 5 predicate places. [2023-11-29 05:44:50,862 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 218 transitions, 657 flow [2023-11-29 05:44:50,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 116.83333333333333) internal successors, (2103), 18 states have internal predecessors, (2103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:50,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:44:50,864 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1] [2023-11-29 05:44:50,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:44:51,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:44:51,065 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-11-29 05:44:51,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:51,065 INFO L85 PathProgramCache]: Analyzing trace with hash -230478714, now seen corresponding path program 3 times [2023-11-29 05:44:51,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:44:51,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665220003] [2023-11-29 05:44:51,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:51,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:44:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:51,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:44:51,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665220003] [2023-11-29 05:44:51,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665220003] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:44:51,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273468969] [2023-11-29 05:44:51,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:44:51,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:44:51,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:44:51,185 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:44:51,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:44:51,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:44:51,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:44:51,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:44:51,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:51,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:44:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 05:44:51,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:44:51,603 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 05:44:51,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273468969] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:44:51,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:44:51,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 13 [2023-11-29 05:44:51,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625363635] [2023-11-29 05:44:51,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:44:51,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:44:51,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:44:51,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:44:51,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:44:52,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 206 [2023-11-29 05:44:52,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 218 transitions, 657 flow. Second operand has 14 states, 14 states have (on average 116.78571428571429) internal successors, (1635), 14 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:52,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:44:52,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 206 [2023-11-29 05:44:52,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:45:00,145 INFO L124 PetriNetUnfolderBase]: 43554/78476 cut-off events. [2023-11-29 05:45:00,145 INFO L125 PetriNetUnfolderBase]: For 324/324 co-relation queries the response was YES. [2023-11-29 05:45:00,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134514 conditions, 78476 events. 43554/78476 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 1948. Compared 742390 event pairs, 25611 based on Foata normal form. 3/62841 useless extension candidates. Maximal degree in co-relation 134437. Up to 55623 conditions per place. [2023-11-29 05:45:00,730 INFO L140 encePairwiseOnDemand]: 196/206 looper letters, 76 selfloop transitions, 40 changer transitions 0/224 dead transitions. [2023-11-29 05:45:00,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 224 transitions, 853 flow [2023-11-29 05:45:00,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 05:45:00,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 05:45:00,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1499 transitions. [2023-11-29 05:45:00,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6063915857605178 [2023-11-29 05:45:00,736 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1499 transitions. [2023-11-29 05:45:00,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1499 transitions. [2023-11-29 05:45:00,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:45:00,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1499 transitions. [2023-11-29 05:45:00,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 124.91666666666667) internal successors, (1499), 12 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:00,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 206.0) internal successors, (2678), 13 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:00,746 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 206.0) internal successors, (2678), 13 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:00,746 INFO L175 Difference]: Start difference. First operand has 187 places, 218 transitions, 657 flow. Second operand 12 states and 1499 transitions. [2023-11-29 05:45:00,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 224 transitions, 853 flow [2023-11-29 05:45:00,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 224 transitions, 763 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-11-29 05:45:00,752 INFO L231 Difference]: Finished difference. Result has 187 places, 224 transitions, 617 flow [2023-11-29 05:45:00,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=617, PETRI_PLACES=187, PETRI_TRANSITIONS=224} [2023-11-29 05:45:00,753 INFO L281 CegarLoopForPetriNet]: 182 programPoint places, 5 predicate places. [2023-11-29 05:45:00,753 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 224 transitions, 617 flow [2023-11-29 05:45:00,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 116.78571428571429) internal successors, (1635), 14 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:00,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:45:00,754 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-29 05:45:00,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 05:45:00,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:45:00,955 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-11-29 05:45:00,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:45:00,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1900976364, now seen corresponding path program 1 times [2023-11-29 05:45:00,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:45:00,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206458586] [2023-11-29 05:45:00,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:45:00,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:45:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:45:01,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 05:45:01,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:45:01,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206458586] [2023-11-29 05:45:01,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206458586] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:45:01,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728808892] [2023-11-29 05:45:01,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:45:01,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:45:01,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:45:01,061 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:45:01,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:45:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:45:01,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:45:01,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:45:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 05:45:01,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:45:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 05:45:01,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728808892] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:45:01,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:45:01,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2023-11-29 05:45:01,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262890786] [2023-11-29 05:45:01,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:45:01,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:45:01,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:45:01,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:45:01,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:45:01,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 206 [2023-11-29 05:45:01,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 224 transitions, 617 flow. Second operand has 11 states, 11 states have (on average 120.72727272727273) internal successors, (1328), 11 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:01,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:45:01,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 206 [2023-11-29 05:45:01,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:45:08,884 INFO L124 PetriNetUnfolderBase]: 43545/78467 cut-off events. [2023-11-29 05:45:08,884 INFO L125 PetriNetUnfolderBase]: For 282/282 co-relation queries the response was YES. [2023-11-29 05:45:09,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134468 conditions, 78467 events. 43545/78467 cut-off events. For 282/282 co-relation queries the response was YES. Maximal size of possible extension queue 1928. Compared 741717 event pairs, 25611 based on Foata normal form. 9/62838 useless extension candidates. Maximal degree in co-relation 134339. Up to 55623 conditions per place. [2023-11-29 05:45:09,331 INFO L140 encePairwiseOnDemand]: 199/206 looper letters, 89 selfloop transitions, 18 changer transitions 0/215 dead transitions. [2023-11-29 05:45:09,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 215 transitions, 770 flow [2023-11-29 05:45:09,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:45:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:45:09,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 942 transitions. [2023-11-29 05:45:09,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6532593619972261 [2023-11-29 05:45:09,334 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 942 transitions. [2023-11-29 05:45:09,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 942 transitions. [2023-11-29 05:45:09,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:45:09,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 942 transitions. [2023-11-29 05:45:09,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 134.57142857142858) internal successors, (942), 7 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:09,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:09,339 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:09,339 INFO L175 Difference]: Start difference. First operand has 187 places, 224 transitions, 617 flow. Second operand 7 states and 942 transitions. [2023-11-29 05:45:09,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 215 transitions, 770 flow [2023-11-29 05:45:09,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 215 transitions, 716 flow, removed 2 selfloop flow, removed 9 redundant places. [2023-11-29 05:45:09,343 INFO L231 Difference]: Finished difference. Result has 184 places, 215 transitions, 538 flow [2023-11-29 05:45:09,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=538, PETRI_PLACES=184, PETRI_TRANSITIONS=215} [2023-11-29 05:45:09,344 INFO L281 CegarLoopForPetriNet]: 182 programPoint places, 2 predicate places. [2023-11-29 05:45:09,344 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 215 transitions, 538 flow [2023-11-29 05:45:09,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 120.72727272727273) internal successors, (1328), 11 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:09,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:45:09,345 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2023-11-29 05:45:09,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:45:09,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:45:09,546 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-11-29 05:45:09,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:45:09,546 INFO L85 PathProgramCache]: Analyzing trace with hash 2079190711, now seen corresponding path program 2 times [2023-11-29 05:45:09,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:45:09,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877903549] [2023-11-29 05:45:09,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:45:09,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:45:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:45:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 05:45:09,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:45:09,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877903549] [2023-11-29 05:45:09,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877903549] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:45:09,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:45:09,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:45:09,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658104535] [2023-11-29 05:45:09,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:45:09,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:45:09,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:45:09,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:45:09,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:45:10,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 206 [2023-11-29 05:45:10,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 215 transitions, 538 flow. Second operand has 6 states, 6 states have (on average 113.16666666666667) internal successors, (679), 6 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:10,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:45:10,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 206 [2023-11-29 05:45:10,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:45:20,484 INFO L124 PetriNetUnfolderBase]: 67203/118014 cut-off events. [2023-11-29 05:45:20,485 INFO L125 PetriNetUnfolderBase]: For 267/267 co-relation queries the response was YES. [2023-11-29 05:45:20,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203403 conditions, 118014 events. 67203/118014 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 2824. Compared 1139752 event pairs, 40738 based on Foata normal form. 0/95246 useless extension candidates. Maximal degree in co-relation 203283. Up to 85019 conditions per place. [2023-11-29 05:45:21,081 INFO L140 encePairwiseOnDemand]: 202/206 looper letters, 107 selfloop transitions, 2 changer transitions 0/213 dead transitions. [2023-11-29 05:45:21,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 213 transitions, 752 flow [2023-11-29 05:45:21,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:45:21,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:45:21,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 531 transitions. [2023-11-29 05:45:21,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444174757281553 [2023-11-29 05:45:21,083 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 531 transitions. [2023-11-29 05:45:21,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 531 transitions. [2023-11-29 05:45:21,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:45:21,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 531 transitions. [2023-11-29 05:45:21,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:21,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:21,087 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:21,087 INFO L175 Difference]: Start difference. First operand has 184 places, 215 transitions, 538 flow. Second operand 4 states and 531 transitions. [2023-11-29 05:45:21,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 213 transitions, 752 flow [2023-11-29 05:45:21,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 213 transitions, 716 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 05:45:21,091 INFO L231 Difference]: Finished difference. Result has 179 places, 213 transitions, 502 flow [2023-11-29 05:45:21,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=502, PETRI_PLACES=179, PETRI_TRANSITIONS=213} [2023-11-29 05:45:21,091 INFO L281 CegarLoopForPetriNet]: 182 programPoint places, -3 predicate places. [2023-11-29 05:45:21,092 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 213 transitions, 502 flow [2023-11-29 05:45:21,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.16666666666667) internal successors, (679), 6 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:21,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:45:21,092 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2023-11-29 05:45:21,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 05:45:21,092 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-11-29 05:45:21,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:45:21,092 INFO L85 PathProgramCache]: Analyzing trace with hash 2079190712, now seen corresponding path program 1 times [2023-11-29 05:45:21,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:45:21,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722520495] [2023-11-29 05:45:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:45:21,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:45:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:45:21,484 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-29 05:45:21,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:45:21,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722520495] [2023-11-29 05:45:21,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722520495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:45:21,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:45:21,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:45:21,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261284043] [2023-11-29 05:45:21,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:45:21,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:45:21,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:45:21,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:45:21,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:45:21,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 206 [2023-11-29 05:45:21,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 213 transitions, 502 flow. Second operand has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:21,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:45:21,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 206 [2023-11-29 05:45:21,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:45:28,300 INFO L124 PetriNetUnfolderBase]: 43545/78329 cut-off events. [2023-11-29 05:45:28,301 INFO L125 PetriNetUnfolderBase]: For 279/279 co-relation queries the response was YES. [2023-11-29 05:45:28,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134302 conditions, 78329 events. 43545/78329 cut-off events. For 279/279 co-relation queries the response was YES. Maximal size of possible extension queue 1938. Compared 739434 event pairs, 25611 based on Foata normal form. 5616/68445 useless extension candidates. Maximal degree in co-relation 134196. Up to 55619 conditions per place. [2023-11-29 05:45:28,686 INFO L140 encePairwiseOnDemand]: 202/206 looper letters, 105 selfloop transitions, 2 changer transitions 0/211 dead transitions. [2023-11-29 05:45:28,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 211 transitions, 712 flow [2023-11-29 05:45:28,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:45:28,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:45:28,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 549 transitions. [2023-11-29 05:45:28,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6662621359223301 [2023-11-29 05:45:28,688 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 549 transitions. [2023-11-29 05:45:28,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 549 transitions. [2023-11-29 05:45:28,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:45:28,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 549 transitions. [2023-11-29 05:45:28,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:28,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:28,693 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:28,693 INFO L175 Difference]: Start difference. First operand has 179 places, 213 transitions, 502 flow. Second operand 4 states and 549 transitions. [2023-11-29 05:45:28,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 211 transitions, 712 flow [2023-11-29 05:45:28,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 211 transitions, 709 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:45:28,698 INFO L231 Difference]: Finished difference. Result has 178 places, 211 transitions, 499 flow [2023-11-29 05:45:28,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=499, PETRI_PLACES=178, PETRI_TRANSITIONS=211} [2023-11-29 05:45:28,699 INFO L281 CegarLoopForPetriNet]: 182 programPoint places, -4 predicate places. [2023-11-29 05:45:28,699 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 211 transitions, 499 flow [2023-11-29 05:45:28,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:28,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:45:28,700 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:45:28,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 05:45:28,700 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-11-29 05:45:28,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:45:28,700 INFO L85 PathProgramCache]: Analyzing trace with hash -845739558, now seen corresponding path program 1 times [2023-11-29 05:45:28,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:45:28,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879177916] [2023-11-29 05:45:28,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:45:28,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:45:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:45:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 05:45:29,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:45:29,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879177916] [2023-11-29 05:45:29,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879177916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:45:29,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:45:29,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:45:29,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721199204] [2023-11-29 05:45:29,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:45:29,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:45:29,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:45:29,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:45:29,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:45:29,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 206 [2023-11-29 05:45:29,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 211 transitions, 499 flow. Second operand has 6 states, 6 states have (on average 113.5) internal successors, (681), 6 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:29,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:45:29,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 206 [2023-11-29 05:45:29,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:45:36,896 INFO L124 PetriNetUnfolderBase]: 44327/80015 cut-off events. [2023-11-29 05:45:36,896 INFO L125 PetriNetUnfolderBase]: For 279/279 co-relation queries the response was YES. [2023-11-29 05:45:37,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137056 conditions, 80015 events. 44327/80015 cut-off events. For 279/279 co-relation queries the response was YES. Maximal size of possible extension queue 1996. Compared 761383 event pairs, 26087 based on Foata normal form. 0/64136 useless extension candidates. Maximal degree in co-relation 136949. Up to 56686 conditions per place. [2023-11-29 05:45:37,314 INFO L140 encePairwiseOnDemand]: 202/206 looper letters, 107 selfloop transitions, 2 changer transitions 0/209 dead transitions. [2023-11-29 05:45:37,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 209 transitions, 713 flow [2023-11-29 05:45:37,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:45:37,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:45:37,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 531 transitions. [2023-11-29 05:45:37,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444174757281553 [2023-11-29 05:45:37,317 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 531 transitions. [2023-11-29 05:45:37,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 531 transitions. [2023-11-29 05:45:37,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:45:37,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 531 transitions. [2023-11-29 05:45:37,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:37,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:37,321 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:37,322 INFO L175 Difference]: Start difference. First operand has 178 places, 211 transitions, 499 flow. Second operand 4 states and 531 transitions. [2023-11-29 05:45:37,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 209 transitions, 713 flow [2023-11-29 05:45:37,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 209 transitions, 710 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:45:37,327 INFO L231 Difference]: Finished difference. Result has 177 places, 209 transitions, 496 flow [2023-11-29 05:45:37,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=496, PETRI_PLACES=177, PETRI_TRANSITIONS=209} [2023-11-29 05:45:37,328 INFO L281 CegarLoopForPetriNet]: 182 programPoint places, -5 predicate places. [2023-11-29 05:45:37,328 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 209 transitions, 496 flow [2023-11-29 05:45:37,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.5) internal successors, (681), 6 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:37,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:45:37,329 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:45:37,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 05:45:37,329 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-11-29 05:45:37,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:45:37,330 INFO L85 PathProgramCache]: Analyzing trace with hash -845739557, now seen corresponding path program 1 times [2023-11-29 05:45:37,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:45:37,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279382757] [2023-11-29 05:45:37,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:45:37,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:45:37,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:45:37,911 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-29 05:45:37,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:45:37,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279382757] [2023-11-29 05:45:37,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279382757] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:45:37,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913448444] [2023-11-29 05:45:37,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:45:37,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:45:37,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:45:37,915 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:45:37,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:45:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:45:38,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:45:38,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:45:38,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:38,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:45:38,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:38,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 05:45:38,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:38,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 05:45:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-29 05:45:38,333 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:45:38,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913448444] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:45:38,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:45:38,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-29 05:45:38,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446210363] [2023-11-29 05:45:38,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:45:38,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:45:38,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:45:38,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:45:38,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:45:38,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 206 [2023-11-29 05:45:38,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 209 transitions, 496 flow. Second operand has 4 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:38,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:45:38,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 206 [2023-11-29 05:45:38,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:45:45,328 INFO L124 PetriNetUnfolderBase]: 43545/78311 cut-off events. [2023-11-29 05:45:45,329 INFO L125 PetriNetUnfolderBase]: For 279/279 co-relation queries the response was YES. [2023-11-29 05:45:45,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134286 conditions, 78311 events. 43545/78311 cut-off events. For 279/279 co-relation queries the response was YES. Maximal size of possible extension queue 1938. Compared 739157 event pairs, 25611 based on Foata normal form. 271/63100 useless extension candidates. Maximal degree in co-relation 134178. Up to 55652 conditions per place. [2023-11-29 05:45:45,758 INFO L140 encePairwiseOnDemand]: 203/206 looper letters, 106 selfloop transitions, 1 changer transitions 0/207 dead transitions. [2023-11-29 05:45:45,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 207 transitions, 706 flow [2023-11-29 05:45:45,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:45:45,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:45:45,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-11-29 05:45:45,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7006472491909385 [2023-11-29 05:45:45,760 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-11-29 05:45:45,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-11-29 05:45:45,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:45:45,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-11-29 05:45:45,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:45,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:45,764 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:45,764 INFO L175 Difference]: Start difference. First operand has 177 places, 209 transitions, 496 flow. Second operand 3 states and 433 transitions. [2023-11-29 05:45:45,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 207 transitions, 706 flow [2023-11-29 05:45:45,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 207 transitions, 703 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:45:45,769 INFO L231 Difference]: Finished difference. Result has 175 places, 207 transitions, 491 flow [2023-11-29 05:45:45,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=491, PETRI_PLACES=175, PETRI_TRANSITIONS=207} [2023-11-29 05:45:45,770 INFO L281 CegarLoopForPetriNet]: 182 programPoint places, -7 predicate places. [2023-11-29 05:45:45,771 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 207 transitions, 491 flow [2023-11-29 05:45:45,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:45,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:45:45,771 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:45:45,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 05:45:45,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 05:45:45,972 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-11-29 05:45:45,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:45:45,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1086191712, now seen corresponding path program 1 times [2023-11-29 05:45:45,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:45:45,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917255095] [2023-11-29 05:45:45,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:45:45,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:45:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:45:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 05:45:46,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:45:46,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917255095] [2023-11-29 05:45:46,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917255095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:45:46,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:45:46,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:45:46,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576320109] [2023-11-29 05:45:46,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:45:46,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:45:46,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:45:46,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:45:46,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:45:46,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 206 [2023-11-29 05:45:46,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 207 transitions, 491 flow. Second operand has 5 states, 5 states have (on average 110.4) internal successors, (552), 5 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:46,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:45:46,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 206 [2023-11-29 05:45:46,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:45:53,388 INFO L124 PetriNetUnfolderBase]: 43545/76574 cut-off events. [2023-11-29 05:45:53,388 INFO L125 PetriNetUnfolderBase]: For 279/279 co-relation queries the response was YES. [2023-11-29 05:45:53,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132549 conditions, 76574 events. 43545/76574 cut-off events. For 279/279 co-relation queries the response was YES. Maximal size of possible extension queue 1863. Compared 701436 event pairs, 25611 based on Foata normal form. 0/62829 useless extension candidates. Maximal degree in co-relation 132542. Up to 55619 conditions per place. [2023-11-29 05:45:53,810 INFO L140 encePairwiseOnDemand]: 195/206 looper letters, 104 selfloop transitions, 3 changer transitions 0/199 dead transitions. [2023-11-29 05:45:53,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 199 transitions, 689 flow [2023-11-29 05:45:53,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:45:53,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:45:53,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 626 transitions. [2023-11-29 05:45:53,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6077669902912621 [2023-11-29 05:45:53,813 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 626 transitions. [2023-11-29 05:45:53,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 626 transitions. [2023-11-29 05:45:53,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:45:53,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 626 transitions. [2023-11-29 05:45:53,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.2) internal successors, (626), 5 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:53,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:53,818 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:53,818 INFO L175 Difference]: Start difference. First operand has 175 places, 207 transitions, 491 flow. Second operand 5 states and 626 transitions. [2023-11-29 05:45:53,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 199 transitions, 689 flow [2023-11-29 05:45:53,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 199 transitions, 688 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:45:53,823 INFO L231 Difference]: Finished difference. Result has 170 places, 199 transitions, 480 flow [2023-11-29 05:45:53,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=480, PETRI_PLACES=170, PETRI_TRANSITIONS=199} [2023-11-29 05:45:53,824 INFO L281 CegarLoopForPetriNet]: 182 programPoint places, -12 predicate places. [2023-11-29 05:45:53,824 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 199 transitions, 480 flow [2023-11-29 05:45:53,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.4) internal successors, (552), 5 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:53,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:45:53,825 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:45:53,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 05:45:53,825 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-11-29 05:45:53,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:45:53,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1086191711, now seen corresponding path program 1 times [2023-11-29 05:45:53,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:45:53,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153425264] [2023-11-29 05:45:53,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:45:53,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:45:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:45:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-29 05:45:54,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:45:54,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153425264] [2023-11-29 05:45:54,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153425264] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:45:54,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137775136] [2023-11-29 05:45:54,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:45:54,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:45:54,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:45:54,395 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:45:54,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:45:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:45:54,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 05:45:54,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:45:54,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 05:45:54,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 05:45:54,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:45:54,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:45:54,640 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 6 treesize of output 5 [2023-11-29 05:45:54,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:45:54,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:45:54,659 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 6 treesize of output 5 [2023-11-29 05:45:54,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:45:54,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 05:45:54,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:45:54,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 05:45:54,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:45:54,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 05:45:54,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 05:45:54,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 05:45:54,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:45:54,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:45:54,764 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 6 treesize of output 5 [2023-11-29 05:45:54,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:45:54,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:45:54,781 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 6 treesize of output 5 [2023-11-29 05:45:54,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:45:54,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 05:45:54,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:45:54,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:45:54,819 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 6 treesize of output 5 [2023-11-29 05:45:54,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:45:54,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:45:54,837 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 6 treesize of output 5 [2023-11-29 05:45:54,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:54,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:45:55,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:45:55,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 05:45:55,058 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 05:45:55,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 05:45:55,126 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-29 05:45:55,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-29 05:45:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 05:45:55,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:45:56,014 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 05:45:56,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137775136] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:45:56,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:45:56,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 8] total 24 [2023-11-29 05:45:56,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751098270] [2023-11-29 05:45:56,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:45:56,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:45:56,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:45:56,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:45:56,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2023-11-29 05:45:57,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 206 [2023-11-29 05:45:57,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 199 transitions, 480 flow. Second operand has 11 states, 11 states have (on average 116.0909090909091) internal successors, (1277), 11 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:57,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:45:57,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 206 [2023-11-29 05:45:57,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:46:06,989 INFO L124 PetriNetUnfolderBase]: 59543/97919 cut-off events. [2023-11-29 05:46:06,989 INFO L125 PetriNetUnfolderBase]: For 435/435 co-relation queries the response was YES. [2023-11-29 05:46:07,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175215 conditions, 97919 events. 59543/97919 cut-off events. For 435/435 co-relation queries the response was YES. Maximal size of possible extension queue 2041. Compared 840304 event pairs, 13607 based on Foata normal form. 0/82144 useless extension candidates. Maximal degree in co-relation 175207. Up to 55027 conditions per place. [2023-11-29 05:46:07,718 INFO L140 encePairwiseOnDemand]: 196/206 looper letters, 158 selfloop transitions, 6 changer transitions 0/252 dead transitions. [2023-11-29 05:46:07,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 252 transitions, 919 flow [2023-11-29 05:46:07,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:46:07,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:46:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 828 transitions. [2023-11-29 05:46:07,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6699029126213593 [2023-11-29 05:46:07,723 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 828 transitions. [2023-11-29 05:46:07,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 828 transitions. [2023-11-29 05:46:07,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:46:07,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 828 transitions. [2023-11-29 05:46:07,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:07,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 206.0) internal successors, (1442), 7 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:07,729 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 206.0) internal successors, (1442), 7 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:07,729 INFO L175 Difference]: Start difference. First operand has 170 places, 199 transitions, 480 flow. Second operand 6 states and 828 transitions. [2023-11-29 05:46:07,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 252 transitions, 919 flow [2023-11-29 05:46:07,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 252 transitions, 914 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:46:07,734 INFO L231 Difference]: Finished difference. Result has 171 places, 197 transitions, 494 flow [2023-11-29 05:46:07,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=494, PETRI_PLACES=171, PETRI_TRANSITIONS=197} [2023-11-29 05:46:07,736 INFO L281 CegarLoopForPetriNet]: 182 programPoint places, -11 predicate places. [2023-11-29 05:46:07,736 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 197 transitions, 494 flow [2023-11-29 05:46:07,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 116.0909090909091) internal successors, (1277), 11 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:07,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:46:07,737 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:46:07,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:46:07,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:46:07,938 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-11-29 05:46:07,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:46:07,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1146877588, now seen corresponding path program 1 times [2023-11-29 05:46:07,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:46:07,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673795454] [2023-11-29 05:46:07,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:46:07,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:46:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:46:08,185 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 05:46:08,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:46:08,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673795454] [2023-11-29 05:46:08,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673795454] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:46:08,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:46:08,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:46:08,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24549030] [2023-11-29 05:46:08,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:46:08,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:46:08,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:46:08,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:46:08,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:46:08,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 206 [2023-11-29 05:46:08,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 197 transitions, 494 flow. Second operand has 6 states, 6 states have (on average 113.83333333333333) internal successors, (683), 6 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:08,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:46:08,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 206 [2023-11-29 05:46:08,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:46:17,820 INFO L124 PetriNetUnfolderBase]: 54619/98111 cut-off events. [2023-11-29 05:46:17,820 INFO L125 PetriNetUnfolderBase]: For 7715/8203 co-relation queries the response was YES. [2023-11-29 05:46:18,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174385 conditions, 98111 events. 54619/98111 cut-off events. For 7715/8203 co-relation queries the response was YES. Maximal size of possible extension queue 2349. Compared 947069 event pairs, 32971 based on Foata normal form. 0/80309 useless extension candidates. Maximal degree in co-relation 174375. Up to 70144 conditions per place. [2023-11-29 05:46:18,517 INFO L140 encePairwiseOnDemand]: 202/206 looper letters, 108 selfloop transitions, 2 changer transitions 0/195 dead transitions. [2023-11-29 05:46:18,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 195 transitions, 710 flow [2023-11-29 05:46:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:46:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:46:18,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 531 transitions. [2023-11-29 05:46:18,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444174757281553 [2023-11-29 05:46:18,520 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 531 transitions. [2023-11-29 05:46:18,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 531 transitions. [2023-11-29 05:46:18,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:46:18,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 531 transitions. [2023-11-29 05:46:18,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:18,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:18,526 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:18,526 INFO L175 Difference]: Start difference. First operand has 171 places, 197 transitions, 494 flow. Second operand 4 states and 531 transitions. [2023-11-29 05:46:18,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 195 transitions, 710 flow [2023-11-29 05:46:18,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 195 transitions, 702 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:46:18,798 INFO L231 Difference]: Finished difference. Result has 168 places, 195 transitions, 486 flow [2023-11-29 05:46:18,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=486, PETRI_PLACES=168, PETRI_TRANSITIONS=195} [2023-11-29 05:46:18,799 INFO L281 CegarLoopForPetriNet]: 182 programPoint places, -14 predicate places. [2023-11-29 05:46:18,799 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 195 transitions, 486 flow [2023-11-29 05:46:18,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.83333333333333) internal successors, (683), 6 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:18,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:46:18,800 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:46:18,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 05:46:18,800 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-11-29 05:46:18,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:46:18,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1146877587, now seen corresponding path program 1 times [2023-11-29 05:46:18,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:46:18,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497064448] [2023-11-29 05:46:18,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:46:18,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:46:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:46:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-29 05:46:19,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:46:19,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497064448] [2023-11-29 05:46:19,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497064448] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:46:19,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257491841] [2023-11-29 05:46:19,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:46:19,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:46:19,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:46:19,213 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:46:19,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:46:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:46:19,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 05:46:19,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:46:19,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:46:19,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:46:19,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 05:46:19,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:46:19,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 05:46:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-29 05:46:19,674 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:46:19,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257491841] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:46:19,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:46:19,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-29 05:46:19,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871496975] [2023-11-29 05:46:19,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:46:19,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:46:19,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:46:19,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:46:19,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:46:19,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 206 [2023-11-29 05:46:19,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 195 transitions, 486 flow. Second operand has 4 states, 4 states have (on average 119.75) internal successors, (479), 4 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:19,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:46:19,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 206 [2023-11-29 05:46:19,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:46:28,947 INFO L124 PetriNetUnfolderBase]: 53622/96150 cut-off events. [2023-11-29 05:46:28,948 INFO L125 PetriNetUnfolderBase]: For 5298/5786 co-relation queries the response was YES. [2023-11-29 05:46:29,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169804 conditions, 96150 events. 53622/96150 cut-off events. For 5298/5786 co-relation queries the response was YES. Maximal size of possible extension queue 2304. Compared 924435 event pairs, 32322 based on Foata normal form. 362/79125 useless extension candidates. Maximal degree in co-relation 169794. Up to 68810 conditions per place. [2023-11-29 05:46:29,533 INFO L140 encePairwiseOnDemand]: 203/206 looper letters, 107 selfloop transitions, 1 changer transitions 0/193 dead transitions. [2023-11-29 05:46:29,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 193 transitions, 698 flow [2023-11-29 05:46:29,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:46:29,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:46:29,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-11-29 05:46:29,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7006472491909385 [2023-11-29 05:46:29,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-11-29 05:46:29,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-11-29 05:46:29,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:46:29,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-11-29 05:46:29,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:29,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:29,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:29,537 INFO L175 Difference]: Start difference. First operand has 168 places, 195 transitions, 486 flow. Second operand 3 states and 433 transitions. [2023-11-29 05:46:29,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 193 transitions, 698 flow [2023-11-29 05:46:29,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 193 transitions, 695 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:46:29,636 INFO L231 Difference]: Finished difference. Result has 166 places, 193 transitions, 481 flow [2023-11-29 05:46:29,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=481, PETRI_PLACES=166, PETRI_TRANSITIONS=193} [2023-11-29 05:46:29,637 INFO L281 CegarLoopForPetriNet]: 182 programPoint places, -16 predicate places. [2023-11-29 05:46:29,637 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 193 transitions, 481 flow [2023-11-29 05:46:29,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.75) internal successors, (479), 4 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:29,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:46:29,637 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:46:29,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:46:29,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 05:46:29,838 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-11-29 05:46:29,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:46:29,838 INFO L85 PathProgramCache]: Analyzing trace with hash -153115036, now seen corresponding path program 1 times [2023-11-29 05:46:29,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:46:29,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144143526] [2023-11-29 05:46:29,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:46:29,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:46:29,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:46:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 05:46:29,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:46:29,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144143526] [2023-11-29 05:46:29,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144143526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:46:29,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:46:29,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:46:29,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134764268] [2023-11-29 05:46:29,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:46:29,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:46:29,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:46:29,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:46:29,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:46:30,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 206 [2023-11-29 05:46:30,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 193 transitions, 481 flow. Second operand has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:30,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:46:30,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 206 [2023-11-29 05:46:30,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:46:39,335 INFO L124 PetriNetUnfolderBase]: 53622/94809 cut-off events. [2023-11-29 05:46:39,336 INFO L125 PetriNetUnfolderBase]: For 5297/5785 co-relation queries the response was YES. [2023-11-29 05:46:39,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168463 conditions, 94809 events. 53622/94809 cut-off events. For 5297/5785 co-relation queries the response was YES. Maximal size of possible extension queue 2239. Compared 893982 event pairs, 32322 based on Foata normal form. 0/78763 useless extension candidates. Maximal degree in co-relation 168453. Up to 68777 conditions per place. [2023-11-29 05:46:39,891 INFO L140 encePairwiseOnDemand]: 195/206 looper letters, 105 selfloop transitions, 3 changer transitions 0/185 dead transitions. [2023-11-29 05:46:39,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 185 transitions, 681 flow [2023-11-29 05:46:39,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:46:39,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:46:39,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 626 transitions. [2023-11-29 05:46:39,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6077669902912621 [2023-11-29 05:46:39,893 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 626 transitions. [2023-11-29 05:46:39,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 626 transitions. [2023-11-29 05:46:39,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:46:39,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 626 transitions. [2023-11-29 05:46:39,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.2) internal successors, (626), 5 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:39,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:39,897 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:39,897 INFO L175 Difference]: Start difference. First operand has 166 places, 193 transitions, 481 flow. Second operand 5 states and 626 transitions. [2023-11-29 05:46:39,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 185 transitions, 681 flow [2023-11-29 05:46:39,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 185 transitions, 680 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:46:40,001 INFO L231 Difference]: Finished difference. Result has 161 places, 185 transitions, 470 flow [2023-11-29 05:46:40,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=470, PETRI_PLACES=161, PETRI_TRANSITIONS=185} [2023-11-29 05:46:40,001 INFO L281 CegarLoopForPetriNet]: 182 programPoint places, -21 predicate places. [2023-11-29 05:46:40,001 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 185 transitions, 470 flow [2023-11-29 05:46:40,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:40,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:46:40,002 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:46:40,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 05:46:40,002 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-11-29 05:46:40,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:46:40,003 INFO L85 PathProgramCache]: Analyzing trace with hash -153115035, now seen corresponding path program 1 times [2023-11-29 05:46:40,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:46:40,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956791206] [2023-11-29 05:46:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:46:40,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:46:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:46:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-29 05:46:40,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:46:40,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956791206] [2023-11-29 05:46:40,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956791206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:46:40,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437929902] [2023-11-29 05:46:40,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:46:40,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:46:40,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:46:40,338 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:46:40,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:46:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:46:40,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 05:46:40,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:46:40,547 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 6 treesize of output 5 [2023-11-29 05:46:40,672 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-29 05:46:40,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-29 05:46:40,837 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 05:46:40,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:46:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 05:46:41,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437929902] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:46:41,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:46:41,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 22 [2023-11-29 05:46:41,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099343440] [2023-11-29 05:46:41,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:46:41,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:46:41,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:46:41,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:46:41,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:46:41,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 206 [2023-11-29 05:46:41,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 185 transitions, 470 flow. Second operand has 10 states, 10 states have (on average 116.4) internal successors, (1164), 10 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:41,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:46:41,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 206 [2023-11-29 05:46:41,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:46:56,681 INFO L124 PetriNetUnfolderBase]: 91665/142726 cut-off events. [2023-11-29 05:46:56,681 INFO L125 PetriNetUnfolderBase]: For 5755/6313 co-relation queries the response was YES. [2023-11-29 05:46:57,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266757 conditions, 142726 events. 91665/142726 cut-off events. For 5755/6313 co-relation queries the response was YES. Maximal size of possible extension queue 2046. Compared 1153763 event pairs, 33723 based on Foata normal form. 0/121223 useless extension candidates. Maximal degree in co-relation 266746. Up to 59592 conditions per place. [2023-11-29 05:46:57,638 INFO L140 encePairwiseOnDemand]: 193/206 looper letters, 171 selfloop transitions, 9 changer transitions 0/253 dead transitions. [2023-11-29 05:46:57,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 253 transitions, 974 flow [2023-11-29 05:46:57,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:46:57,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:46:57,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 844 transitions. [2023-11-29 05:46:57,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6828478964401294 [2023-11-29 05:46:57,641 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 844 transitions. [2023-11-29 05:46:57,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 844 transitions. [2023-11-29 05:46:57,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:46:57,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 844 transitions. [2023-11-29 05:46:57,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 140.66666666666666) internal successors, (844), 6 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:57,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 206.0) internal successors, (1442), 7 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:57,645 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 206.0) internal successors, (1442), 7 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:57,645 INFO L175 Difference]: Start difference. First operand has 161 places, 185 transitions, 470 flow. Second operand 6 states and 844 transitions. [2023-11-29 05:46:57,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 253 transitions, 974 flow [2023-11-29 05:46:57,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 253 transitions, 969 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:46:57,656 INFO L231 Difference]: Finished difference. Result has 165 places, 190 transitions, 527 flow [2023-11-29 05:46:57,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=527, PETRI_PLACES=165, PETRI_TRANSITIONS=190} [2023-11-29 05:46:57,656 INFO L281 CegarLoopForPetriNet]: 182 programPoint places, -17 predicate places. [2023-11-29 05:46:57,657 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 190 transitions, 527 flow [2023-11-29 05:46:57,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 116.4) internal successors, (1164), 10 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:57,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:46:57,657 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:46:57,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:46:57,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 05:46:57,858 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-11-29 05:46:57,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:46:57,858 INFO L85 PathProgramCache]: Analyzing trace with hash -73434477, now seen corresponding path program 1 times [2023-11-29 05:46:57,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:46:57,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177797152] [2023-11-29 05:46:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:46:57,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:46:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:46:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-29 05:46:58,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:46:58,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177797152] [2023-11-29 05:46:58,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177797152] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:46:58,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428704144] [2023-11-29 05:46:58,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:46:58,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:46:58,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:46:58,439 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:46:58,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:46:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:46:58,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 05:46:58,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:46:58,668 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 6 treesize of output 5 [2023-11-29 05:46:58,815 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-29 05:46:58,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-29 05:46:58,980 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 05:46:58,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:46:59,325 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 05:46:59,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428704144] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:46:59,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:46:59,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 22 [2023-11-29 05:46:59,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24084123] [2023-11-29 05:46:59,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:46:59,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:46:59,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:46:59,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:46:59,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:47:00,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 206 [2023-11-29 05:47:00,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 190 transitions, 527 flow. Second operand has 10 states, 10 states have (on average 116.5) internal successors, (1165), 10 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:00,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:47:00,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 206 [2023-11-29 05:47:00,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:47:18,421 INFO L124 PetriNetUnfolderBase]: 101689/166299 cut-off events. [2023-11-29 05:47:18,421 INFO L125 PetriNetUnfolderBase]: For 37606/41144 co-relation queries the response was YES. [2023-11-29 05:47:18,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322164 conditions, 166299 events. 101689/166299 cut-off events. For 37606/41144 co-relation queries the response was YES. Maximal size of possible extension queue 2670. Compared 1480611 event pairs, 23923 based on Foata normal form. 0/140957 useless extension candidates. Maximal degree in co-relation 322151. Up to 91207 conditions per place. [2023-11-29 05:47:19,538 INFO L140 encePairwiseOnDemand]: 196/206 looper letters, 168 selfloop transitions, 6 changer transitions 0/247 dead transitions. [2023-11-29 05:47:19,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 247 transitions, 1041 flow [2023-11-29 05:47:19,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:47:19,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:47:19,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 826 transitions. [2023-11-29 05:47:19,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6682847896440129 [2023-11-29 05:47:19,541 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 826 transitions. [2023-11-29 05:47:19,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 826 transitions. [2023-11-29 05:47:19,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:47:19,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 826 transitions. [2023-11-29 05:47:19,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 137.66666666666666) internal successors, (826), 6 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:19,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 206.0) internal successors, (1442), 7 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:19,544 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 206.0) internal successors, (1442), 7 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:19,544 INFO L175 Difference]: Start difference. First operand has 165 places, 190 transitions, 527 flow. Second operand 6 states and 826 transitions. [2023-11-29 05:47:19,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 247 transitions, 1041 flow [2023-11-29 05:47:19,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 247 transitions, 1036 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:47:19,625 INFO L231 Difference]: Finished difference. Result has 166 places, 188 transitions, 541 flow [2023-11-29 05:47:19,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=541, PETRI_PLACES=166, PETRI_TRANSITIONS=188} [2023-11-29 05:47:19,625 INFO L281 CegarLoopForPetriNet]: 182 programPoint places, -16 predicate places. [2023-11-29 05:47:19,625 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 188 transitions, 541 flow [2023-11-29 05:47:19,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 116.5) internal successors, (1165), 10 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:19,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:47:19,626 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:19,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:47:19,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 05:47:19,827 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-11-29 05:47:19,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:19,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1850987721, now seen corresponding path program 1 times [2023-11-29 05:47:19,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:19,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013734835] [2023-11-29 05:47:19,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:19,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:20,090 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 05:47:20,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:20,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013734835] [2023-11-29 05:47:20,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013734835] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:20,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863388986] [2023-11-29 05:47:20,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:20,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:20,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:20,093 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:20,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12954560-ceee-4852-ab50-bd4084c3919b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:47:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:20,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:47:20,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 05:47:20,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:20,579 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 20 treesize of output 16 [2023-11-29 05:47:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 05:47:20,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863388986] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:20,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:20,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-29 05:47:20,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760069506] [2023-11-29 05:47:20,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:20,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 05:47:20,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:20,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 05:47:20,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:47:21,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 206 [2023-11-29 05:47:21,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 188 transitions, 541 flow. Second operand has 25 states, 25 states have (on average 116.6) internal successors, (2915), 25 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:21,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:47:21,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 206 [2023-11-29 05:47:21,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand