./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:15:22,564 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:15:22,655 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:15:22,662 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:15:22,662 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:15:22,701 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:15:22,702 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:15:22,702 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:15:22,703 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:15:22,703 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:15:22,705 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:15:22,705 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:15:22,706 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:15:22,706 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:15:22,708 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:15:22,709 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:15:22,709 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:15:22,709 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:15:22,710 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:15:22,710 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:15:22,710 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:15:22,711 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:15:22,711 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:15:22,711 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:15:22,712 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:15:22,712 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:15:22,712 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:15:22,713 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:15:22,713 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:15:22,713 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:15:22,714 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:15:22,714 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:15:22,714 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:15:22,714 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:15:22,715 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:15:22,715 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:15:22,715 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:15:22,716 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:15:22,716 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:15:22,716 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:15:22,716 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:15:22,717 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:15:22,717 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_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 [2024-10-31 22:15:23,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:15:23,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:15:23,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:15:23,076 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:15:23,077 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:15:23,079 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c Unable to find full path for "g++" [2024-10-31 22:15:25,129 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:15:25,395 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:15:25,398 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2024-10-31 22:15:25,415 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/data/56e71b65a/9b9ce89b27e44cc08bc173c6c5ea7d55/FLAGe54cd5a3f [2024-10-31 22:15:25,706 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/data/56e71b65a/9b9ce89b27e44cc08bc173c6c5ea7d55 [2024-10-31 22:15:25,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:15:25,710 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:15:25,713 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:15:25,714 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:15:25,720 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:15:25,721 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:15:25" (1/1) ... [2024-10-31 22:15:25,722 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a0d3a5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:25, skipping insertion in model container [2024-10-31 22:15:25,723 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:15:25" (1/1) ... [2024-10-31 22:15:25,764 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:15:26,014 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 22:15:26,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:15:26,037 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:15:26,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:15:26,111 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:15:26,112 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:26 WrapperNode [2024-10-31 22:15:26,112 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:15:26,113 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:15:26,113 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:15:26,113 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:15:26,122 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:26" (1/1) ... [2024-10-31 22:15:26,137 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:26" (1/1) ... [2024-10-31 22:15:26,198 INFO L138 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 22, calls inlined = 30, statements flattened = 409 [2024-10-31 22:15:26,198 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:15:26,199 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:15:26,199 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:15:26,199 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:15:26,214 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:26" (1/1) ... [2024-10-31 22:15:26,214 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:26" (1/1) ... [2024-10-31 22:15:26,219 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:26" (1/1) ... [2024-10-31 22:15:26,246 INFO L175 MemorySlicer]: Split 20 memory accesses to 2 slices as follows [2, 18]. 90 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-31 22:15:26,246 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:26" (1/1) ... [2024-10-31 22:15:26,247 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:26" (1/1) ... [2024-10-31 22:15:26,262 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:26" (1/1) ... [2024-10-31 22:15:26,268 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:26" (1/1) ... [2024-10-31 22:15:26,270 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:26" (1/1) ... [2024-10-31 22:15:26,273 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:26" (1/1) ... [2024-10-31 22:15:26,277 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:15:26,278 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:15:26,279 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:15:26,279 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:15:26,280 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:26" (1/1) ... [2024-10-31 22:15:26,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:15:26,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:26,327 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:15:26,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:15:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:15:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:15:26,368 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:15:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:15:26,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:15:26,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:15:26,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:15:26,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:15:26,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:15:26,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:15:26,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:15:26,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:15:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:15:26,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:15:26,377 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:15:26,568 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:15:26,570 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:15:27,550 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:15:27,550 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:15:28,166 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:15:28,167 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-31 22:15:28,168 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:15:28 BoogieIcfgContainer [2024-10-31 22:15:28,168 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:15:28,170 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:15:28,171 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:15:28,175 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:15:28,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:15:25" (1/3) ... [2024-10-31 22:15:28,177 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ebedb64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:15:28, skipping insertion in model container [2024-10-31 22:15:28,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:15:26" (2/3) ... [2024-10-31 22:15:28,178 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ebedb64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:15:28, skipping insertion in model container [2024-10-31 22:15:28,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:15:28" (3/3) ... [2024-10-31 22:15:28,180 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2024-10-31 22:15:28,201 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:15:28,202 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2024-10-31 22:15:28,202 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:15:28,311 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:15:28,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 126 transitions, 266 flow [2024-10-31 22:15:28,435 INFO L124 PetriNetUnfolderBase]: 20/124 cut-off events. [2024-10-31 22:15:28,436 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:15:28,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 124 events. 20/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 391 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2024-10-31 22:15:28,447 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 126 transitions, 266 flow [2024-10-31 22:15:28,455 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 123 transitions, 258 flow [2024-10-31 22:15:28,471 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:15:28,481 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38038839, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:15:28,481 INFO L334 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2024-10-31 22:15:28,485 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:15:28,486 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:15:28,486 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:15:28,487 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:28,487 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:15:28,488 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-31 22:15:28,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:28,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1300439, now seen corresponding path program 1 times [2024-10-31 22:15:28,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:28,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037808574] [2024-10-31 22:15:28,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:28,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:28,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:28,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:28,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037808574] [2024-10-31 22:15:28,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037808574] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:28,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:28,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:15:28,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615540541] [2024-10-31 22:15:28,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:29,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:15:29,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:29,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:15:29,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:15:29,139 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-10-31 22:15:29,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 123 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:29,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:29,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-10-31 22:15:29,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:30,004 INFO L124 PetriNetUnfolderBase]: 1446/3461 cut-off events. [2024-10-31 22:15:30,005 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-10-31 22:15:30,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5601 conditions, 3461 events. 1446/3461 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 25244 event pairs, 790 based on Foata normal form. 1/2625 useless extension candidates. Maximal degree in co-relation 5456. Up to 2083 conditions per place. [2024-10-31 22:15:30,038 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 56 selfloop transitions, 2 changer transitions 0/117 dead transitions. [2024-10-31 22:15:30,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 117 transitions, 362 flow [2024-10-31 22:15:30,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:15:30,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:15:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2024-10-31 22:15:30,054 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6587301587301587 [2024-10-31 22:15:30,056 INFO L175 Difference]: Start difference. First operand has 110 places, 123 transitions, 258 flow. Second operand 3 states and 249 transitions. [2024-10-31 22:15:30,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 117 transitions, 362 flow [2024-10-31 22:15:30,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 117 transitions, 354 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:15:30,067 INFO L231 Difference]: Finished difference. Result has 104 places, 117 transitions, 242 flow [2024-10-31 22:15:30,069 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=104, PETRI_TRANSITIONS=117} [2024-10-31 22:15:30,076 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, -6 predicate places. [2024-10-31 22:15:30,076 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 117 transitions, 242 flow [2024-10-31 22:15:30,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:30,077 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:30,077 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:15:30,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:15:30,079 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-31 22:15:30,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:30,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1300440, now seen corresponding path program 1 times [2024-10-31 22:15:30,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:30,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517548243] [2024-10-31 22:15:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:30,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:30,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:30,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517548243] [2024-10-31 22:15:30,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517548243] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:30,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:30,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:15:30,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531621557] [2024-10-31 22:15:30,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:30,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:15:30,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:30,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:15:30,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:15:30,568 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-10-31 22:15:30,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 117 transitions, 242 flow. Second operand has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:30,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:30,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-10-31 22:15:30,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:31,230 INFO L124 PetriNetUnfolderBase]: 1446/3465 cut-off events. [2024-10-31 22:15:31,231 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-10-31 22:15:31,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5580 conditions, 3465 events. 1446/3465 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 25213 event pairs, 790 based on Foata normal form. 1/2628 useless extension candidates. Maximal degree in co-relation 5549. Up to 2091 conditions per place. [2024-10-31 22:15:31,255 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 60 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2024-10-31 22:15:31,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 121 transitions, 378 flow [2024-10-31 22:15:31,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:15:31,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:15:31,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2024-10-31 22:15:31,259 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.671957671957672 [2024-10-31 22:15:31,260 INFO L175 Difference]: Start difference. First operand has 104 places, 117 transitions, 242 flow. Second operand 3 states and 254 transitions. [2024-10-31 22:15:31,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 121 transitions, 378 flow [2024-10-31 22:15:31,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 121 transitions, 374 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:15:31,266 INFO L231 Difference]: Finished difference. Result has 105 places, 119 transitions, 264 flow [2024-10-31 22:15:31,267 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=264, PETRI_PLACES=105, PETRI_TRANSITIONS=119} [2024-10-31 22:15:31,268 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, -5 predicate places. [2024-10-31 22:15:31,268 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 119 transitions, 264 flow [2024-10-31 22:15:31,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:31,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:31,269 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 22:15:31,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:15:31,271 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-31 22:15:31,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:31,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1249764370, now seen corresponding path program 1 times [2024-10-31 22:15:31,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:31,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113406894] [2024-10-31 22:15:31,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:31,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:31,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:31,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:31,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113406894] [2024-10-31 22:15:31,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113406894] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:31,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917243811] [2024-10-31 22:15:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:31,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:31,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:31,632 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:31,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:15:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:31,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 22:15:31,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:31,833 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 [2024-10-31 22:15:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:31,914 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:32,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917243811] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:32,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:32,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-31 22:15:32,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183218277] [2024-10-31 22:15:32,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:32,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:15:32,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:32,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:15:32,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:15:32,423 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-10-31 22:15:32,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 119 transitions, 264 flow. Second operand has 9 states, 9 states have (on average 63.666666666666664) internal successors, (573), 9 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:32,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:32,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-10-31 22:15:32,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:33,229 INFO L124 PetriNetUnfolderBase]: 1452/3483 cut-off events. [2024-10-31 22:15:33,230 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-10-31 22:15:33,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5638 conditions, 3483 events. 1452/3483 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25257 event pairs, 790 based on Foata normal form. 0/2646 useless extension candidates. Maximal degree in co-relation 5584. Up to 2094 conditions per place. [2024-10-31 22:15:33,253 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 66 selfloop transitions, 16 changer transitions 0/139 dead transitions. [2024-10-31 22:15:33,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 139 transitions, 495 flow [2024-10-31 22:15:33,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:15:33,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:15:33,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 460 transitions. [2024-10-31 22:15:33,259 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6084656084656085 [2024-10-31 22:15:33,259 INFO L175 Difference]: Start difference. First operand has 105 places, 119 transitions, 264 flow. Second operand 6 states and 460 transitions. [2024-10-31 22:15:33,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 139 transitions, 495 flow [2024-10-31 22:15:33,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 139 transitions, 488 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:15:33,266 INFO L231 Difference]: Finished difference. Result has 112 places, 131 transitions, 376 flow [2024-10-31 22:15:33,266 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=112, PETRI_TRANSITIONS=131} [2024-10-31 22:15:33,267 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 2 predicate places. [2024-10-31 22:15:33,267 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 131 transitions, 376 flow [2024-10-31 22:15:33,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 63.666666666666664) internal successors, (573), 9 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:33,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:33,269 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-31 22:15:33,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:15:33,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:33,474 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-31 22:15:33,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:33,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1847960000, now seen corresponding path program 2 times [2024-10-31 22:15:33,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:33,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394410581] [2024-10-31 22:15:33,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:33,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:34,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:34,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394410581] [2024-10-31 22:15:34,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394410581] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:34,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274433155] [2024-10-31 22:15:34,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:15:34,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:34,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:34,132 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:34,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:15:34,257 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:15:34,257 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:15:34,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-31 22:15:34,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:34,280 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 [2024-10-31 22:15:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:34,520 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:34,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274433155] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:34,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:34,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-10-31 22:15:34,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236106879] [2024-10-31 22:15:34,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:34,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-31 22:15:34,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:34,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-31 22:15:34,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-10-31 22:15:36,744 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-10-31 22:15:36,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 131 transitions, 376 flow. Second operand has 18 states, 18 states have (on average 63.833333333333336) internal successors, (1149), 18 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:36,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:36,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-10-31 22:15:36,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:38,532 INFO L124 PetriNetUnfolderBase]: 1454/3489 cut-off events. [2024-10-31 22:15:38,533 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-10-31 22:15:38,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5696 conditions, 3489 events. 1454/3489 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25342 event pairs, 790 based on Foata normal form. 2/2656 useless extension candidates. Maximal degree in co-relation 5603. Up to 2095 conditions per place. [2024-10-31 22:15:38,592 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 68 selfloop transitions, 20 changer transitions 0/145 dead transitions. [2024-10-31 22:15:38,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 145 transitions, 596 flow [2024-10-31 22:15:38,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:15:38,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:15:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 524 transitions. [2024-10-31 22:15:38,602 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5941043083900227 [2024-10-31 22:15:38,602 INFO L175 Difference]: Start difference. First operand has 112 places, 131 transitions, 376 flow. Second operand 7 states and 524 transitions. [2024-10-31 22:15:38,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 145 transitions, 596 flow [2024-10-31 22:15:38,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 145 transitions, 570 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-10-31 22:15:38,618 INFO L231 Difference]: Finished difference. Result has 118 places, 135 transitions, 430 flow [2024-10-31 22:15:38,618 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=430, PETRI_PLACES=118, PETRI_TRANSITIONS=135} [2024-10-31 22:15:38,619 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 8 predicate places. [2024-10-31 22:15:38,619 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 135 transitions, 430 flow [2024-10-31 22:15:38,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.833333333333336) internal successors, (1149), 18 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:38,620 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:38,621 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:38,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:15:38,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:38,824 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-31 22:15:38,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:38,825 INFO L85 PathProgramCache]: Analyzing trace with hash 989591744, now seen corresponding path program 1 times [2024-10-31 22:15:38,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:38,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205202139] [2024-10-31 22:15:38,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:38,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:38,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:38,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:38,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205202139] [2024-10-31 22:15:38,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205202139] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:38,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085043842] [2024-10-31 22:15:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:38,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:38,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:38,958 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:38,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:15:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:39,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:15:39,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:39,185 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:39,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085043842] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:39,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:39,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-10-31 22:15:39,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439977590] [2024-10-31 22:15:39,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:39,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:15:39,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:39,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:15:39,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:15:39,285 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-10-31 22:15:39,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 135 transitions, 430 flow. Second operand has 8 states, 8 states have (on average 66.5) internal successors, (532), 8 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:39,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:39,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-10-31 22:15:39,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:40,123 INFO L124 PetriNetUnfolderBase]: 1448/3483 cut-off events. [2024-10-31 22:15:40,123 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-10-31 22:15:40,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5680 conditions, 3483 events. 1448/3483 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25177 event pairs, 790 based on Foata normal form. 6/2654 useless extension candidates. Maximal degree in co-relation 5589. Up to 2090 conditions per place. [2024-10-31 22:15:40,151 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 61 selfloop transitions, 17 changer transitions 0/137 dead transitions. [2024-10-31 22:15:40,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 137 transitions, 557 flow [2024-10-31 22:15:40,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:15:40,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:15:40,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 462 transitions. [2024-10-31 22:15:40,154 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-10-31 22:15:40,154 INFO L175 Difference]: Start difference. First operand has 118 places, 135 transitions, 430 flow. Second operand 6 states and 462 transitions. [2024-10-31 22:15:40,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 137 transitions, 557 flow [2024-10-31 22:15:40,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 137 transitions, 528 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-10-31 22:15:40,159 INFO L231 Difference]: Finished difference. Result has 120 places, 131 transitions, 409 flow [2024-10-31 22:15:40,159 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=409, PETRI_PLACES=120, PETRI_TRANSITIONS=131} [2024-10-31 22:15:40,160 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 10 predicate places. [2024-10-31 22:15:40,160 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 131 transitions, 409 flow [2024-10-31 22:15:40,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 66.5) internal successors, (532), 8 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:40,161 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:40,161 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1] [2024-10-31 22:15:40,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 22:15:40,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:40,364 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-31 22:15:40,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:40,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2068108282, now seen corresponding path program 3 times [2024-10-31 22:15:40,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:40,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265643460] [2024-10-31 22:15:40,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:40,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:40,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:40,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265643460] [2024-10-31 22:15:40,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265643460] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:40,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863903070] [2024-10-31 22:15:40,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:15:40,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:40,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:40,548 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:40,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:15:40,661 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-31 22:15:40,662 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:15:40,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:15:40,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:40,674 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 [2024-10-31 22:15:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 22:15:40,832 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 22:15:40,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863903070] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:40,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:40,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 13 [2024-10-31 22:15:40,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358761371] [2024-10-31 22:15:40,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:40,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:15:40,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:40,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:15:40,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:15:41,613 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-10-31 22:15:41,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 131 transitions, 409 flow. Second operand has 14 states, 14 states have (on average 63.785714285714285) internal successors, (893), 14 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:41,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:41,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-10-31 22:15:41,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:42,736 INFO L124 PetriNetUnfolderBase]: 1446/3477 cut-off events. [2024-10-31 22:15:42,736 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-10-31 22:15:42,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5668 conditions, 3477 events. 1446/3477 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25146 event pairs, 790 based on Foata normal form. 2/2644 useless extension candidates. Maximal degree in co-relation 5587. Up to 2084 conditions per place. [2024-10-31 22:15:42,768 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 55 selfloop transitions, 21 changer transitions 0/133 dead transitions. [2024-10-31 22:15:42,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 133 transitions, 539 flow [2024-10-31 22:15:42,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 22:15:42,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-31 22:15:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 760 transitions. [2024-10-31 22:15:42,771 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5483405483405484 [2024-10-31 22:15:42,772 INFO L175 Difference]: Start difference. First operand has 120 places, 131 transitions, 409 flow. Second operand 11 states and 760 transitions. [2024-10-31 22:15:42,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 133 transitions, 539 flow [2024-10-31 22:15:42,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 133 transitions, 507 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-10-31 22:15:42,776 INFO L231 Difference]: Finished difference. Result has 123 places, 131 transitions, 405 flow [2024-10-31 22:15:42,776 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=405, PETRI_PLACES=123, PETRI_TRANSITIONS=131} [2024-10-31 22:15:42,777 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 13 predicate places. [2024-10-31 22:15:42,777 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 131 transitions, 405 flow [2024-10-31 22:15:42,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 63.785714285714285) internal successors, (893), 14 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:42,778 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:42,778 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:42,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-31 22:15:42,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:42,979 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-31 22:15:42,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:42,980 INFO L85 PathProgramCache]: Analyzing trace with hash 610411437, now seen corresponding path program 2 times [2024-10-31 22:15:42,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:42,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452653964] [2024-10-31 22:15:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:42,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:15:43,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:43,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452653964] [2024-10-31 22:15:43,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452653964] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:43,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773072467] [2024-10-31 22:15:43,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:15:43,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:43,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:43,163 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:43,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:15:43,286 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 22:15:43,287 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:15:43,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-31 22:15:43,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:43,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:15:43,315 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 [2024-10-31 22:15:43,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:15:43,412 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 [2024-10-31 22:15:43,431 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:15:43,432 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 [2024-10-31 22:15:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-31 22:15:43,527 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:15:43,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773072467] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:43,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:15:43,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2024-10-31 22:15:43,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560336803] [2024-10-31 22:15:43,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:43,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:15:43,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:43,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:15:43,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:15:43,717 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 126 [2024-10-31 22:15:43,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 131 transitions, 405 flow. Second operand has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:43,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:43,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 126 [2024-10-31 22:15:43,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:44,768 INFO L124 PetriNetUnfolderBase]: 3171/6786 cut-off events. [2024-10-31 22:15:44,768 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-10-31 22:15:44,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11558 conditions, 6786 events. 3171/6786 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 48102 event pairs, 1228 based on Foata normal form. 0/5445 useless extension candidates. Maximal degree in co-relation 11460. Up to 2561 conditions per place. [2024-10-31 22:15:44,815 INFO L140 encePairwiseOnDemand]: 117/126 looper letters, 118 selfloop transitions, 7 changer transitions 0/178 dead transitions. [2024-10-31 22:15:44,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 178 transitions, 752 flow [2024-10-31 22:15:44,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:15:44,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:15:44,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 461 transitions. [2024-10-31 22:15:44,817 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6097883597883598 [2024-10-31 22:15:44,817 INFO L175 Difference]: Start difference. First operand has 123 places, 131 transitions, 405 flow. Second operand 6 states and 461 transitions. [2024-10-31 22:15:44,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 178 transitions, 752 flow [2024-10-31 22:15:44,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 178 transitions, 681 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-10-31 22:15:44,822 INFO L231 Difference]: Finished difference. Result has 118 places, 132 transitions, 362 flow [2024-10-31 22:15:44,822 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=362, PETRI_PLACES=118, PETRI_TRANSITIONS=132} [2024-10-31 22:15:44,823 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 8 predicate places. [2024-10-31 22:15:44,823 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 132 transitions, 362 flow [2024-10-31 22:15:44,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:44,825 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:44,825 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:44,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:15:45,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:45,029 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-31 22:15:45,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:45,030 INFO L85 PathProgramCache]: Analyzing trace with hash 610411436, now seen corresponding path program 1 times [2024-10-31 22:15:45,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:45,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500881312] [2024-10-31 22:15:45,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:45,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:15:45,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:45,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500881312] [2024-10-31 22:15:45,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500881312] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:45,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151028897] [2024-10-31 22:15:45,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:45,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:45,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:45,243 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:45,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:15:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:45,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:15:45,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:15:45,473 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:45,537 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:15:45,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151028897] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:45,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:45,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-31 22:15:45,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508284137] [2024-10-31 22:15:45,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:45,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:15:45,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:45,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:15:45,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:15:45,574 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-10-31 22:15:45,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 132 transitions, 362 flow. Second operand has 13 states, 13 states have (on average 66.38461538461539) internal successors, (863), 13 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:45,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:45,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-10-31 22:15:45,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:46,731 INFO L124 PetriNetUnfolderBase]: 2756/6501 cut-off events. [2024-10-31 22:15:46,732 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2024-10-31 22:15:46,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10868 conditions, 6501 events. 2756/6501 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 49033 event pairs, 1536 based on Foata normal form. 2/5155 useless extension candidates. Maximal degree in co-relation 10795. Up to 3984 conditions per place. [2024-10-31 22:15:46,768 INFO L140 encePairwiseOnDemand]: 121/126 looper letters, 63 selfloop transitions, 12 changer transitions 0/132 dead transitions. [2024-10-31 22:15:46,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 132 transitions, 516 flow [2024-10-31 22:15:46,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:15:46,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:15:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 524 transitions. [2024-10-31 22:15:46,771 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5941043083900227 [2024-10-31 22:15:46,771 INFO L175 Difference]: Start difference. First operand has 118 places, 132 transitions, 362 flow. Second operand 7 states and 524 transitions. [2024-10-31 22:15:46,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 132 transitions, 516 flow [2024-10-31 22:15:46,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 132 transitions, 508 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:15:46,774 INFO L231 Difference]: Finished difference. Result has 120 places, 130 transitions, 366 flow [2024-10-31 22:15:46,774 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=366, PETRI_PLACES=120, PETRI_TRANSITIONS=130} [2024-10-31 22:15:46,776 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 10 predicate places. [2024-10-31 22:15:46,778 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 130 transitions, 366 flow [2024-10-31 22:15:46,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 66.38461538461539) internal successors, (863), 13 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:46,778 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:46,779 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:46,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:15:46,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-31 22:15:46,983 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-31 22:15:46,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:46,984 INFO L85 PathProgramCache]: Analyzing trace with hash -820950917, now seen corresponding path program 2 times [2024-10-31 22:15:46,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:46,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731259771] [2024-10-31 22:15:46,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:46,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-10-31 22:15:47,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:47,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731259771] [2024-10-31 22:15:47,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731259771] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:47,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:47,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:15:47,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363338524] [2024-10-31 22:15:47,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:47,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:15:47,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:47,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:15:47,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:15:47,440 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 126 [2024-10-31 22:15:47,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 130 transitions, 366 flow. Second operand has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:47,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:47,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 126 [2024-10-31 22:15:47,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:48,482 INFO L124 PetriNetUnfolderBase]: 2756/6139 cut-off events. [2024-10-31 22:15:48,482 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-10-31 22:15:48,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10459 conditions, 6139 events. 2756/6139 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 43887 event pairs, 1536 based on Foata normal form. 0/4997 useless extension candidates. Maximal degree in co-relation 10379. Up to 3981 conditions per place. [2024-10-31 22:15:48,525 INFO L140 encePairwiseOnDemand]: 115/126 looper letters, 70 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2024-10-31 22:15:48,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 122 transitions, 496 flow [2024-10-31 22:15:48,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:15:48,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:15:48,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 336 transitions. [2024-10-31 22:15:48,528 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-10-31 22:15:48,528 INFO L175 Difference]: Start difference. First operand has 120 places, 130 transitions, 366 flow. Second operand 5 states and 336 transitions. [2024-10-31 22:15:48,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 122 transitions, 496 flow [2024-10-31 22:15:48,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 122 transitions, 472 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 22:15:48,532 INFO L231 Difference]: Finished difference. Result has 110 places, 122 transitions, 332 flow [2024-10-31 22:15:48,532 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=110, PETRI_TRANSITIONS=122} [2024-10-31 22:15:48,533 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 0 predicate places. [2024-10-31 22:15:48,533 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 122 transitions, 332 flow [2024-10-31 22:15:48,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:48,534 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:48,534 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:48,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:15:48,535 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-31 22:15:48,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:48,535 INFO L85 PathProgramCache]: Analyzing trace with hash 612564798, now seen corresponding path program 1 times [2024-10-31 22:15:48,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:48,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565844899] [2024-10-31 22:15:48,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:48,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-10-31 22:15:48,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:48,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565844899] [2024-10-31 22:15:48,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565844899] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:48,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:48,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:15:48,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142092812] [2024-10-31 22:15:48,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:48,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:15:48,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:48,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:15:48,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:15:48,785 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 126 [2024-10-31 22:15:48,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 122 transitions, 332 flow. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:48,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:48,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 126 [2024-10-31 22:15:48,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:49,819 INFO L124 PetriNetUnfolderBase]: 2756/5801 cut-off events. [2024-10-31 22:15:49,819 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2024-10-31 22:15:49,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10112 conditions, 5801 events. 2756/5801 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 38939 event pairs, 1536 based on Foata normal form. 0/4997 useless extension candidates. Maximal degree in co-relation 10039. Up to 3981 conditions per place. [2024-10-31 22:15:49,899 INFO L140 encePairwiseOnDemand]: 116/126 looper letters, 71 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2024-10-31 22:15:49,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 114 transitions, 462 flow [2024-10-31 22:15:49,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:15:49,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:15:49,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 282 transitions. [2024-10-31 22:15:49,910 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-10-31 22:15:49,910 INFO L175 Difference]: Start difference. First operand has 110 places, 122 transitions, 332 flow. Second operand 4 states and 282 transitions. [2024-10-31 22:15:49,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 114 transitions, 462 flow [2024-10-31 22:15:49,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 114 transitions, 457 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:15:49,915 INFO L231 Difference]: Finished difference. Result has 102 places, 114 transitions, 315 flow [2024-10-31 22:15:49,918 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=315, PETRI_PLACES=102, PETRI_TRANSITIONS=114} [2024-10-31 22:15:49,922 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, -8 predicate places. [2024-10-31 22:15:49,923 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 114 transitions, 315 flow [2024-10-31 22:15:49,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:49,923 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:49,924 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:49,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 22:15:49,924 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-31 22:15:49,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:49,925 INFO L85 PathProgramCache]: Analyzing trace with hash 612564799, now seen corresponding path program 1 times [2024-10-31 22:15:49,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:49,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517051150] [2024-10-31 22:15:49,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:49,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-31 22:15:50,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:50,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517051150] [2024-10-31 22:15:50,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517051150] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:50,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312057710] [2024-10-31 22:15:50,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:50,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:50,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:50,615 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:50,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091b16c5-4c91-4be1-9002-c1722c68b620/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:15:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:50,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-31 22:15:50,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:51,014 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 22:15:51,014 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:51,161 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 [2024-10-31 22:15:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 22:15:51,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312057710] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:51,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:51,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-10-31 22:15:51,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913192994] [2024-10-31 22:15:51,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:51,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-31 22:15:51,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:51,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-31 22:15:51,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462