./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/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_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/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_05903082-23cf-4d6b-b71c-2c80b2cad550/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 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:11:10,448 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:11:10,544 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:11:10,550 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:11:10,551 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:11:10,591 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:11:10,593 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:11:10,594 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:11:10,594 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:11:10,595 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:11:10,595 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:11:10,596 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:11:10,596 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:11:10,602 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:11:10,602 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:11:10,603 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:11:10,603 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:11:10,603 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:11:10,604 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:11:10,604 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:11:10,604 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:11:10,608 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:11:10,609 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:11:10,609 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:11:10,609 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:11:10,609 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:11:10,610 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:11:10,610 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:11:10,610 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:11:10,611 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:11:10,611 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:11:10,611 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:11:10,611 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:11:10,613 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:11:10,613 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:11:10,613 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:11:10,614 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:11:10,614 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:11:10,614 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:11:10,614 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:11:10,614 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:11:10,615 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:11:10,615 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_05903082-23cf-4d6b-b71c-2c80b2cad550/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a [2024-10-31 22:11:11,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:11:11,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:11:11,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:11:11,102 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:11:11,103 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:11:11,104 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c Unable to find full path for "g++" [2024-10-31 22:11:13,186 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:11:13,455 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:11:13,455 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2024-10-31 22:11:13,464 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/data/3f29ccca1/20d0843d5f0343c0ad782f8f05c6591d/FLAGdd1aee292 [2024-10-31 22:11:13,760 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/data/3f29ccca1/20d0843d5f0343c0ad782f8f05c6591d [2024-10-31 22:11:13,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:11:13,765 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:11:13,767 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:11:13,768 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:11:13,773 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:11:13,774 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:11:13" (1/1) ... [2024-10-31 22:11:13,776 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f0cb1f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:13, skipping insertion in model container [2024-10-31 22:11:13,776 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:11:13" (1/1) ... [2024-10-31 22:11:13,799 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:11:14,041 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 22:11:14,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:11:14,054 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:11:14,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:11:14,102 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:11:14,103 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14 WrapperNode [2024-10-31 22:11:14,103 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:11:14,104 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:11:14,104 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:11:14,105 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:11:14,112 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:14,120 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:14,142 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 89 [2024-10-31 22:11:14,143 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:11:14,144 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:11:14,144 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:11:14,144 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:11:14,156 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:14,156 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:14,160 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:14,181 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-31 22:11:14,182 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:14,182 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:14,190 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:14,194 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:14,196 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:14,197 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:14,200 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:11:14,201 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:11:14,201 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:11:14,201 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:11:14,202 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:14,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:11:14,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:14,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:11:14,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:11:14,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:11:14,272 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:11:14,272 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:11:14,273 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:11:14,274 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:11:14,274 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-31 22:11:14,274 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-31 22:11:14,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:11:14,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:11:14,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:11:14,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:11:14,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 22:11:14,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 22:11:14,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:11:14,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:11:14,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:11:14,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:11:14,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:11:14,280 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 22:11:14,413 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:11:14,415 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:11:14,827 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:11:14,827 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:11:15,223 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:11:15,223 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-31 22:11:15,224 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:11:15 BoogieIcfgContainer [2024-10-31 22:11:15,225 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:11:15,228 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:11:15,228 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:11:15,231 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:11:15,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:11:13" (1/3) ... [2024-10-31 22:11:15,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dbd479e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:11:15, skipping insertion in model container [2024-10-31 22:11:15,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (2/3) ... [2024-10-31 22:11:15,234 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dbd479e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:11:15, skipping insertion in model container [2024-10-31 22:11:15,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:11:15" (3/3) ... [2024-10-31 22:11:15,237 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2024-10-31 22:11:15,257 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:11:15,258 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-10-31 22:11:15,258 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:11:15,324 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-31 22:11:15,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 50 transitions, 121 flow [2024-10-31 22:11:15,421 INFO L124 PetriNetUnfolderBase]: 4/47 cut-off events. [2024-10-31 22:11:15,421 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 22:11:15,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 4/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 103 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-10-31 22:11:15,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 50 transitions, 121 flow [2024-10-31 22:11:15,431 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 46 transitions, 110 flow [2024-10-31 22:11:15,447 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:11:15,459 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;@41d0834c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:11:15,460 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-10-31 22:11:15,465 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:11:15,465 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:11:15,465 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:11:15,465 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:15,466 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:11:15,466 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:11:15,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:15,473 INFO L85 PathProgramCache]: Analyzing trace with hash 494854, now seen corresponding path program 1 times [2024-10-31 22:11:15,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:15,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955564793] [2024-10-31 22:11:15,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:15,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:15,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:15,819 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 22:11:15,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:15,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955564793] [2024-10-31 22:11:15,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955564793] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:15,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:15,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:11:15,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813183838] [2024-10-31 22:11:15,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:15,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:15,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:15,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:15,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:15,888 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-10-31 22:11:15,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 22:11:15,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:15,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-10-31 22:11:15,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:16,428 INFO L124 PetriNetUnfolderBase]: 1316/1930 cut-off events. [2024-10-31 22:11:16,429 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2024-10-31 22:11:16,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3943 conditions, 1930 events. 1316/1930 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9858 event pairs, 1060 based on Foata normal form. 1/1377 useless extension candidates. Maximal degree in co-relation 3637. Up to 1877 conditions per place. [2024-10-31 22:11:16,453 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 30 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-10-31 22:11:16,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 156 flow [2024-10-31 22:11:16,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:11:16,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-10-31 22:11:16,470 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2024-10-31 22:11:16,472 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 110 flow. Second operand 3 states and 67 transitions. [2024-10-31 22:11:16,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 156 flow [2024-10-31 22:11:16,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 22:11:16,483 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 84 flow [2024-10-31 22:11:16,485 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-10-31 22:11:16,491 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -13 predicate places. [2024-10-31 22:11:16,492 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 84 flow [2024-10-31 22:11:16,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 22:11:16,492 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:16,492 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:11:16,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:11:16,494 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:11:16,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:16,495 INFO L85 PathProgramCache]: Analyzing trace with hash 494855, now seen corresponding path program 1 times [2024-10-31 22:11:16,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:16,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329370737] [2024-10-31 22:11:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:16,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:16,892 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 22:11:16,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:16,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329370737] [2024-10-31 22:11:16,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329370737] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:16,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:16,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:11:16,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27015322] [2024-10-31 22:11:16,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:16,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:11:16,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:16,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:11:16,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:11:16,902 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-10-31 22:11:16,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 22:11:16,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:16,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-10-31 22:11:16,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:17,314 INFO L124 PetriNetUnfolderBase]: 1317/1933 cut-off events. [2024-10-31 22:11:17,314 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-31 22:11:17,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3865 conditions, 1933 events. 1317/1933 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9817 event pairs, 1060 based on Foata normal form. 0/1379 useless extension candidates. Maximal degree in co-relation 3843. Up to 1882 conditions per place. [2024-10-31 22:11:17,327 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-10-31 22:11:17,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 164 flow [2024-10-31 22:11:17,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:11:17,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:11:17,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-10-31 22:11:17,332 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.365 [2024-10-31 22:11:17,332 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 84 flow. Second operand 4 states and 73 transitions. [2024-10-31 22:11:17,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 164 flow [2024-10-31 22:11:17,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:11:17,334 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 107 flow [2024-10-31 22:11:17,336 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-10-31 22:11:17,337 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -10 predicate places. [2024-10-31 22:11:17,337 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 107 flow [2024-10-31 22:11:17,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 22:11:17,337 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:17,338 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 22:11:17,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:11:17,338 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:11:17,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:17,339 INFO L85 PathProgramCache]: Analyzing trace with hash 475570971, now seen corresponding path program 1 times [2024-10-31 22:11:17,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:17,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575565238] [2024-10-31 22:11:17,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:17,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:17,772 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 22:11:17,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:17,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575565238] [2024-10-31 22:11:17,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575565238] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:17,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99916369] [2024-10-31 22:11:17,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:17,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:17,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:17,779 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:17,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:11:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:17,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:11:17,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:17,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-10-31 22:11:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:18,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:18,493 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 22:11:18,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99916369] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:18,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:18,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-31 22:11:18,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129893279] [2024-10-31 22:11:18,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:18,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:11:18,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:18,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:11:18,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:11:18,550 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-10-31 22:11:18,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 107 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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 22:11:18,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:18,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-10-31 22:11:18,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:19,293 INFO L124 PetriNetUnfolderBase]: 1317/1932 cut-off events. [2024-10-31 22:11:19,293 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-31 22:11:19,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3872 conditions, 1932 events. 1317/1932 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9863 event pairs, 1060 based on Foata normal form. 0/1378 useless extension candidates. Maximal degree in co-relation 3850. Up to 1878 conditions per place. [2024-10-31 22:11:19,305 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 28 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2024-10-31 22:11:19,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 173 flow [2024-10-31 22:11:19,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:11:19,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:11:19,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-10-31 22:11:19,309 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3 [2024-10-31 22:11:19,309 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 107 flow. Second operand 6 states and 90 transitions. [2024-10-31 22:11:19,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 173 flow [2024-10-31 22:11:19,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:11:19,311 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 114 flow [2024-10-31 22:11:19,311 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-10-31 22:11:19,313 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2024-10-31 22:11:19,313 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 114 flow [2024-10-31 22:11:19,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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 22:11:19,313 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:19,314 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 22:11:19,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:11:19,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:19,518 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:11:19,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:19,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1859881490, now seen corresponding path program 1 times [2024-10-31 22:11:19,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:19,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622562158] [2024-10-31 22:11:19,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:19,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:19,680 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 22:11:19,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:19,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622562158] [2024-10-31 22:11:19,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622562158] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:19,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:19,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:11:19,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999519822] [2024-10-31 22:11:19,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:19,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:19,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:19,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:19,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:19,691 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-10-31 22:11:19,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 22:11:19,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:19,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-10-31 22:11:19,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:19,941 INFO L124 PetriNetUnfolderBase]: 1316/1931 cut-off events. [2024-10-31 22:11:19,941 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-31 22:11:19,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3873 conditions, 1931 events. 1316/1931 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9800 event pairs, 1060 based on Foata normal form. 1/1378 useless extension candidates. Maximal degree in co-relation 3851. Up to 1880 conditions per place. [2024-10-31 22:11:19,955 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 32 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-10-31 22:11:19,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 38 transitions, 176 flow [2024-10-31 22:11:19,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:11:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-10-31 22:11:19,957 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-10-31 22:11:19,957 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 114 flow. Second operand 3 states and 65 transitions. [2024-10-31 22:11:19,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 38 transitions, 176 flow [2024-10-31 22:11:19,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 150 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-10-31 22:11:19,959 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 86 flow [2024-10-31 22:11:19,961 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-10-31 22:11:19,963 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -12 predicate places. [2024-10-31 22:11:19,963 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 86 flow [2024-10-31 22:11:19,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 22:11:19,963 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:19,963 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:19,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:11:19,964 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:11:19,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:19,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1359754370, now seen corresponding path program 1 times [2024-10-31 22:11:19,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:19,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398192907] [2024-10-31 22:11:19,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:19,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:20,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:20,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398192907] [2024-10-31 22:11:20,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398192907] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:20,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41603783] [2024-10-31 22:11:20,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:20,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:20,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:20,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:20,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:11:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:20,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 22:11:20,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:20,359 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 22:11:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:20,444 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:20,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41603783] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:20,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:11:20,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-10-31 22:11:20,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229947124] [2024-10-31 22:11:20,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:20,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:11:20,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:20,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:11:20,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:11:20,583 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-10-31 22:11:20,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 86 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 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 22:11:20,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:20,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-10-31 22:11:20,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:21,055 INFO L124 PetriNetUnfolderBase]: 1814/2679 cut-off events. [2024-10-31 22:11:21,056 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-31 22:11:21,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5292 conditions, 2679 events. 1814/2679 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 14525 event pairs, 880 based on Foata normal form. 0/1942 useless extension candidates. Maximal degree in co-relation 5281. Up to 1584 conditions per place. [2024-10-31 22:11:21,073 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 47 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-10-31 22:11:21,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 236 flow [2024-10-31 22:11:21,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:11:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:11:21,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-10-31 22:11:21,075 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-10-31 22:11:21,075 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 86 flow. Second operand 6 states and 115 transitions. [2024-10-31 22:11:21,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 236 flow [2024-10-31 22:11:21,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:11:21,077 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 115 flow [2024-10-31 22:11:21,077 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=115, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-10-31 22:11:21,082 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2024-10-31 22:11:21,083 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 115 flow [2024-10-31 22:11:21,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 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 22:11:21,083 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:21,083 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:21,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:11:21,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:21,284 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:11:21,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:21,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1359754371, now seen corresponding path program 1 times [2024-10-31 22:11:21,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:21,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139134733] [2024-10-31 22:11:21,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:21,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:21,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:21,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139134733] [2024-10-31 22:11:21,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139134733] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:21,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:21,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:11:21,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008783960] [2024-10-31 22:11:21,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:21,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:11:21,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:21,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:11:21,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:11:21,393 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-10-31 22:11:21,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 22:11:21,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:21,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-10-31 22:11:21,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:21,614 INFO L124 PetriNetUnfolderBase]: 1001/1468 cut-off events. [2024-10-31 22:11:21,615 INFO L125 PetriNetUnfolderBase]: For 904/904 co-relation queries the response was YES. [2024-10-31 22:11:21,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3605 conditions, 1468 events. 1001/1468 cut-off events. For 904/904 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6568 event pairs, 733 based on Foata normal form. 123/1413 useless extension candidates. Maximal degree in co-relation 794. Up to 1405 conditions per place. [2024-10-31 22:11:21,626 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 31 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-10-31 22:11:21,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 175 flow [2024-10-31 22:11:21,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:11:21,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:11:21,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-10-31 22:11:21,628 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34 [2024-10-31 22:11:21,628 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 115 flow. Second operand 4 states and 68 transitions. [2024-10-31 22:11:21,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 175 flow [2024-10-31 22:11:21,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:11:21,632 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 108 flow [2024-10-31 22:11:21,633 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-10-31 22:11:21,634 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -10 predicate places. [2024-10-31 22:11:21,634 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 108 flow [2024-10-31 22:11:21,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 22:11:21,634 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:21,635 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:21,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:11:21,636 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:11:21,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:21,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1083423898, now seen corresponding path program 1 times [2024-10-31 22:11:21,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:21,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476183225] [2024-10-31 22:11:21,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:21,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:21,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:21,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476183225] [2024-10-31 22:11:21,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476183225] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:21,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394309145] [2024-10-31 22:11:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:21,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:21,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:21,801 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:21,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:11:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:21,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:11:21,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:21,948 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:22,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394309145] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:22,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:22,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-10-31 22:11:22,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451707807] [2024-10-31 22:11:22,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:22,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:11:22,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:22,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:11:22,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:11:22,105 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-10-31 22:11:22,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 108 flow. Second operand has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 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 22:11:22,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:22,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-10-31 22:11:22,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:22,647 INFO L124 PetriNetUnfolderBase]: 1728/2523 cut-off events. [2024-10-31 22:11:22,647 INFO L125 PetriNetUnfolderBase]: For 1661/1661 co-relation queries the response was YES. [2024-10-31 22:11:22,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6300 conditions, 2523 events. 1728/2523 cut-off events. For 1661/1661 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11932 event pairs, 1148 based on Foata normal form. 0/2237 useless extension candidates. Maximal degree in co-relation 4244. Up to 1681 conditions per place. [2024-10-31 22:11:22,666 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 69 selfloop transitions, 8 changer transitions 0/80 dead transitions. [2024-10-31 22:11:22,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 80 transitions, 404 flow [2024-10-31 22:11:22,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:11:22,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:11:22,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-10-31 22:11:22,669 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-10-31 22:11:22,669 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 108 flow. Second operand 7 states and 135 transitions. [2024-10-31 22:11:22,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 80 transitions, 404 flow [2024-10-31 22:11:22,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 80 transitions, 400 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:11:22,674 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 156 flow [2024-10-31 22:11:22,675 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=156, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-10-31 22:11:22,675 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2024-10-31 22:11:22,679 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 156 flow [2024-10-31 22:11:22,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 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 22:11:22,680 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:22,680 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:22,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:11:22,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:22,881 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:11:22,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:22,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1689668966, now seen corresponding path program 1 times [2024-10-31 22:11:22,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:22,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035780064] [2024-10-31 22:11:22,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:22,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:22,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:22,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035780064] [2024-10-31 22:11:22,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035780064] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:22,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566062031] [2024-10-31 22:11:22,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:22,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:22,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:22,997 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:23,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:11:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:23,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:11:23,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:23,179 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:23,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566062031] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:23,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:23,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-10-31 22:11:23,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589697623] [2024-10-31 22:11:23,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:23,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:11:23,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:23,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:11:23,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:11:23,314 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-10-31 22:11:23,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 156 flow. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 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 22:11:23,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:23,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-10-31 22:11:23,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:23,903 INFO L124 PetriNetUnfolderBase]: 1788/2621 cut-off events. [2024-10-31 22:11:23,903 INFO L125 PetriNetUnfolderBase]: For 1585/1677 co-relation queries the response was YES. [2024-10-31 22:11:23,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6793 conditions, 2621 events. 1788/2621 cut-off events. For 1585/1677 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12682 event pairs, 1114 based on Foata normal form. 38/2421 useless extension candidates. Maximal degree in co-relation 4626. Up to 1826 conditions per place. [2024-10-31 22:11:23,926 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 74 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2024-10-31 22:11:23,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 456 flow [2024-10-31 22:11:23,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:11:23,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:11:23,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-10-31 22:11:23,928 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-10-31 22:11:23,928 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 156 flow. Second operand 8 states and 155 transitions. [2024-10-31 22:11:23,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 456 flow [2024-10-31 22:11:23,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 87 transitions, 454 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:11:23,933 INFO L231 Difference]: Finished difference. Result has 59 places, 46 transitions, 215 flow [2024-10-31 22:11:23,934 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=215, PETRI_PLACES=59, PETRI_TRANSITIONS=46} [2024-10-31 22:11:23,934 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2024-10-31 22:11:23,935 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 46 transitions, 215 flow [2024-10-31 22:11:23,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 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 22:11:23,935 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:23,935 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:23,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:11:24,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:24,136 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:11:24,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:24,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1823740779, now seen corresponding path program 1 times [2024-10-31 22:11:24,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:24,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988432360] [2024-10-31 22:11:24,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:24,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:24,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:24,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988432360] [2024-10-31 22:11:24,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988432360] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:24,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493694975] [2024-10-31 22:11:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:24,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:24,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:24,376 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:24,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:11:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:24,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-31 22:11:24,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:24,621 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:11:24,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493694975] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:24,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:11:24,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2024-10-31 22:11:24,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137137319] [2024-10-31 22:11:24,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:24,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:11:24,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:24,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:11:24,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:11:24,669 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-10-31 22:11:24,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 46 transitions, 215 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 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 22:11:24,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:24,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-10-31 22:11:24,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:25,182 INFO L124 PetriNetUnfolderBase]: 2001/3062 cut-off events. [2024-10-31 22:11:25,183 INFO L125 PetriNetUnfolderBase]: For 4359/4426 co-relation queries the response was YES. [2024-10-31 22:11:25,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8678 conditions, 3062 events. 2001/3062 cut-off events. For 4359/4426 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15779 event pairs, 1077 based on Foata normal form. 0/2835 useless extension candidates. Maximal degree in co-relation 5665. Up to 2134 conditions per place. [2024-10-31 22:11:25,209 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 60 selfloop transitions, 6 changer transitions 0/70 dead transitions. [2024-10-31 22:11:25,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 469 flow [2024-10-31 22:11:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:11:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:11:25,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-10-31 22:11:25,210 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.384 [2024-10-31 22:11:25,211 INFO L175 Difference]: Start difference. First operand has 59 places, 46 transitions, 215 flow. Second operand 5 states and 96 transitions. [2024-10-31 22:11:25,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 469 flow [2024-10-31 22:11:25,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 70 transitions, 454 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-10-31 22:11:25,219 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 227 flow [2024-10-31 22:11:25,220 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=227, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-10-31 22:11:25,220 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 8 predicate places. [2024-10-31 22:11:25,221 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 227 flow [2024-10-31 22:11:25,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 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 22:11:25,221 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:25,221 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:25,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-31 22:11:25,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:25,425 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:11:25,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:25,426 INFO L85 PathProgramCache]: Analyzing trace with hash -848433454, now seen corresponding path program 2 times [2024-10-31 22:11:25,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:25,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074454090] [2024-10-31 22:11:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:25,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:25,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:25,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074454090] [2024-10-31 22:11:25,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074454090] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:25,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962878939] [2024-10-31 22:11:25,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:11:25,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:25,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:25,632 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:25,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:11:25,726 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 22:11:25,727 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:11:25,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-31 22:11:25,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:25,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-10-31 22:11:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:11:26,368 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:11:26,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962878939] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:26,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:11:26,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2024-10-31 22:11:26,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104206460] [2024-10-31 22:11:26,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:26,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:11:26,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:26,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:11:26,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:11:26,443 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-10-31 22:11:26,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 227 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 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 22:11:26,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:26,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-10-31 22:11:26,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:27,341 INFO L124 PetriNetUnfolderBase]: 3212/4591 cut-off events. [2024-10-31 22:11:27,341 INFO L125 PetriNetUnfolderBase]: For 7092/7202 co-relation queries the response was YES. [2024-10-31 22:11:27,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14214 conditions, 4591 events. 3212/4591 cut-off events. For 7092/7202 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 21749 event pairs, 1290 based on Foata normal form. 0/4267 useless extension candidates. Maximal degree in co-relation 10987. Up to 2994 conditions per place. [2024-10-31 22:11:27,381 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 80 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2024-10-31 22:11:27,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 92 transitions, 619 flow [2024-10-31 22:11:27,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:11:27,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:11:27,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-10-31 22:11:27,383 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-10-31 22:11:27,383 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 227 flow. Second operand 6 states and 117 transitions. [2024-10-31 22:11:27,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 92 transitions, 619 flow [2024-10-31 22:11:27,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 92 transitions, 604 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:11:27,392 INFO L231 Difference]: Finished difference. Result has 64 places, 51 transitions, 261 flow [2024-10-31 22:11:27,393 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=261, PETRI_PLACES=64, PETRI_TRANSITIONS=51} [2024-10-31 22:11:27,393 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 12 predicate places. [2024-10-31 22:11:27,393 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 51 transitions, 261 flow [2024-10-31 22:11:27,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 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 22:11:27,396 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:27,396 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:27,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:11:27,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 22:11:27,600 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:11:27,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:27,601 INFO L85 PathProgramCache]: Analyzing trace with hash 384438138, now seen corresponding path program 2 times [2024-10-31 22:11:27,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:27,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643009125] [2024-10-31 22:11:27,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:27,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:27,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:27,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643009125] [2024-10-31 22:11:27,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643009125] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:27,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373712515] [2024-10-31 22:11:27,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:11:27,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:27,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:27,854 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:27,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:11:27,928 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:11:27,928 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:11:27,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-31 22:11:27,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:28,065 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:28,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-31 22:11:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:28,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373712515] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:28,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:28,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-10-31 22:11:28,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354324288] [2024-10-31 22:11:28,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:28,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-31 22:11:28,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:28,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-31 22:11:28,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-10-31 22:11:28,402 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-10-31 22:11:28,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 51 transitions, 261 flow. Second operand has 18 states, 18 states have (on average 11.666666666666666) internal successors, (210), 18 states have internal predecessors, (210), 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 22:11:28,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:28,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-10-31 22:11:28,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:29,859 INFO L124 PetriNetUnfolderBase]: 3687/5458 cut-off events. [2024-10-31 22:11:29,860 INFO L125 PetriNetUnfolderBase]: For 8045/8908 co-relation queries the response was YES. [2024-10-31 22:11:29,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17858 conditions, 5458 events. 3687/5458 cut-off events. For 8045/8908 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 28715 event pairs, 1334 based on Foata normal form. 388/5829 useless extension candidates. Maximal degree in co-relation 14440. Up to 2084 conditions per place. [2024-10-31 22:11:29,909 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 125 selfloop transitions, 14 changer transitions 0/144 dead transitions. [2024-10-31 22:11:29,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 144 transitions, 898 flow [2024-10-31 22:11:29,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:11:29,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-31 22:11:29,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-10-31 22:11:29,976 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.438 [2024-10-31 22:11:29,976 INFO L175 Difference]: Start difference. First operand has 64 places, 51 transitions, 261 flow. Second operand 10 states and 219 transitions. [2024-10-31 22:11:29,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 144 transitions, 898 flow [2024-10-31 22:11:30,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 144 transitions, 866 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-10-31 22:11:30,008 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 328 flow [2024-10-31 22:11:30,009 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=328, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2024-10-31 22:11:30,010 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 21 predicate places. [2024-10-31 22:11:30,010 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 328 flow [2024-10-31 22:11:30,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.666666666666666) internal successors, (210), 18 states have internal predecessors, (210), 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 22:11:30,010 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:30,011 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:30,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 22:11:30,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-31 22:11:30,212 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:11:30,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:30,213 INFO L85 PathProgramCache]: Analyzing trace with hash 202087547, now seen corresponding path program 1 times [2024-10-31 22:11:30,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:30,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92560438] [2024-10-31 22:11:30,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:30,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:30,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:30,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:30,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92560438] [2024-10-31 22:11:30,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92560438] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:30,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660141656] [2024-10-31 22:11:30,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:30,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:30,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:30,455 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:30,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:11:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:30,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:11:30,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:30,721 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:30,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660141656] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:30,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:30,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-10-31 22:11:30,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652296180] [2024-10-31 22:11:30,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:30,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-31 22:11:30,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:30,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-31 22:11:30,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2024-10-31 22:11:30,921 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-10-31 22:11:30,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 328 flow. Second operand has 18 states, 18 states have (on average 11.166666666666666) internal successors, (201), 18 states have internal predecessors, (201), 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 22:11:30,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:30,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-10-31 22:11:30,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:32,403 INFO L124 PetriNetUnfolderBase]: 7046/10034 cut-off events. [2024-10-31 22:11:32,403 INFO L125 PetriNetUnfolderBase]: For 30208/30572 co-relation queries the response was YES. [2024-10-31 22:11:32,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36322 conditions, 10034 events. 7046/10034 cut-off events. For 30208/30572 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 52658 event pairs, 3666 based on Foata normal form. 0/9868 useless extension candidates. Maximal degree in co-relation 19726. Up to 5316 conditions per place. [2024-10-31 22:11:32,509 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 125 selfloop transitions, 14 changer transitions 0/142 dead transitions. [2024-10-31 22:11:32,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 142 transitions, 1135 flow [2024-10-31 22:11:32,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:11:32,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:11:32,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-10-31 22:11:32,511 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2024-10-31 22:11:32,512 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 328 flow. Second operand 9 states and 174 transitions. [2024-10-31 22:11:32,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 142 transitions, 1135 flow [2024-10-31 22:11:32,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 142 transitions, 1036 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-10-31 22:11:32,570 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 392 flow [2024-10-31 22:11:32,570 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=392, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2024-10-31 22:11:32,571 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 28 predicate places. [2024-10-31 22:11:32,571 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 392 flow [2024-10-31 22:11:32,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.166666666666666) internal successors, (201), 18 states have internal predecessors, (201), 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 22:11:32,572 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:32,572 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:32,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-31 22:11:32,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-31 22:11:32,778 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:11:32,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:32,778 INFO L85 PathProgramCache]: Analyzing trace with hash 275334849, now seen corresponding path program 1 times [2024-10-31 22:11:32,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:32,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266317052] [2024-10-31 22:11:32,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:32,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:32,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:32,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:32,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266317052] [2024-10-31 22:11:32,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266317052] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:32,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696435819] [2024-10-31 22:11:32,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:32,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:32,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:32,976 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:32,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 22:11:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:33,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 22:11:33,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:33,199 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:33,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696435819] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:33,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:33,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-10-31 22:11:33,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816403957] [2024-10-31 22:11:33,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:33,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:11:33,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:33,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:11:33,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:11:33,334 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-10-31 22:11:33,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 392 flow. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 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 22:11:33,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:33,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-10-31 22:11:33,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:34,395 INFO L124 PetriNetUnfolderBase]: 6959/9784 cut-off events. [2024-10-31 22:11:34,395 INFO L125 PetriNetUnfolderBase]: For 28513/30064 co-relation queries the response was YES. [2024-10-31 22:11:34,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35536 conditions, 9784 events. 6959/9784 cut-off events. For 28513/30064 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 50208 event pairs, 4861 based on Foata normal form. 736/10468 useless extension candidates. Maximal degree in co-relation 25618. Up to 8803 conditions per place. [2024-10-31 22:11:34,478 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 83 selfloop transitions, 12 changer transitions 0/99 dead transitions. [2024-10-31 22:11:34,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 99 transitions, 766 flow [2024-10-31 22:11:34,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:11:34,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:11:34,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-10-31 22:11:34,480 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37 [2024-10-31 22:11:34,480 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 392 flow. Second operand 8 states and 148 transitions. [2024-10-31 22:11:34,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 99 transitions, 766 flow [2024-10-31 22:11:34,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 99 transitions, 757 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-10-31 22:11:34,584 INFO L231 Difference]: Finished difference. Result has 88 places, 67 transitions, 442 flow [2024-10-31 22:11:34,584 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=442, PETRI_PLACES=88, PETRI_TRANSITIONS=67} [2024-10-31 22:11:34,585 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 36 predicate places. [2024-10-31 22:11:34,585 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 67 transitions, 442 flow [2024-10-31 22:11:34,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 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 22:11:34,586 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:34,586 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-10-31 22:11:34,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-31 22:11:34,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-31 22:11:34,790 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:11:34,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:34,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1880639510, now seen corresponding path program 3 times [2024-10-31 22:11:34,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:34,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376094687] [2024-10-31 22:11:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:34,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:34,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:34,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376094687] [2024-10-31 22:11:34,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376094687] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:34,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576500192] [2024-10-31 22:11:34,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:11:34,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:34,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:34,991 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:34,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-31 22:11:35,083 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-31 22:11:35,084 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:11:35,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 22:11:35,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:11:35,244 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:35,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-10-31 22:11:35,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:11:35,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576500192] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:35,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:35,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 19 [2024-10-31 22:11:35,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281850059] [2024-10-31 22:11:35,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:35,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-31 22:11:35,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:35,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-31 22:11:35,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:11:35,728 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-10-31 22:11:35,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 67 transitions, 442 flow. Second operand has 20 states, 20 states have (on average 11.05) internal successors, (221), 20 states have internal predecessors, (221), 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 22:11:35,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:35,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-10-31 22:11:35,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:37,604 INFO L124 PetriNetUnfolderBase]: 6227/8755 cut-off events. [2024-10-31 22:11:37,604 INFO L125 PetriNetUnfolderBase]: For 17894/19278 co-relation queries the response was YES. [2024-10-31 22:11:37,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32068 conditions, 8755 events. 6227/8755 cut-off events. For 17894/19278 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 45230 event pairs, 1413 based on Foata normal form. 832/9565 useless extension candidates. Maximal degree in co-relation 23403. Up to 1970 conditions per place. [2024-10-31 22:11:37,730 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 224 selfloop transitions, 27 changer transitions 0/255 dead transitions. [2024-10-31 22:11:37,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 255 transitions, 1900 flow [2024-10-31 22:11:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-31 22:11:37,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-31 22:11:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 331 transitions. [2024-10-31 22:11:37,733 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41375 [2024-10-31 22:11:37,733 INFO L175 Difference]: Start difference. First operand has 88 places, 67 transitions, 442 flow. Second operand 16 states and 331 transitions. [2024-10-31 22:11:37,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 255 transitions, 1900 flow [2024-10-31 22:11:37,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 255 transitions, 1877 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-10-31 22:11:37,833 INFO L231 Difference]: Finished difference. Result has 103 places, 75 transitions, 576 flow [2024-10-31 22:11:37,834 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=576, PETRI_PLACES=103, PETRI_TRANSITIONS=75} [2024-10-31 22:11:37,834 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 51 predicate places. [2024-10-31 22:11:37,834 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 75 transitions, 576 flow [2024-10-31 22:11:37,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.05) internal successors, (221), 20 states have internal predecessors, (221), 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 22:11:37,835 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:37,835 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:37,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-31 22:11:38,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:38,036 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:11:38,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:38,036 INFO L85 PathProgramCache]: Analyzing trace with hash 537255637, now seen corresponding path program 2 times [2024-10-31 22:11:38,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:38,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833612634] [2024-10-31 22:11:38,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:38,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:11:38,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:38,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833612634] [2024-10-31 22:11:38,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833612634] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:38,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694538374] [2024-10-31 22:11:38,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:11:38,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:38,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:38,452 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:38,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-31 22:11:38,549 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:11:38,549 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:11:38,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 22:11:38,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:11:38,857 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:39,188 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 35 treesize of output 31 [2024-10-31 22:11:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:11:39,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694538374] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:39,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:39,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-10-31 22:11:39,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229949039] [2024-10-31 22:11:39,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:39,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-31 22:11:39,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:39,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-31 22:11:39,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:11:39,470 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-10-31 22:11:39,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 75 transitions, 576 flow. Second operand has 20 states, 20 states have (on average 11.4) internal successors, (228), 20 states have internal predecessors, (228), 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 22:11:39,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:39,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-10-31 22:11:39,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:40,508 INFO L124 PetriNetUnfolderBase]: 5428/7649 cut-off events. [2024-10-31 22:11:40,508 INFO L125 PetriNetUnfolderBase]: For 33470/34640 co-relation queries the response was YES. [2024-10-31 22:11:40,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32004 conditions, 7649 events. 5428/7649 cut-off events. For 33470/34640 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 38237 event pairs, 1141 based on Foata normal form. 688/8336 useless extension candidates. Maximal degree in co-relation 23736. Up to 2511 conditions per place. [2024-10-31 22:11:40,613 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 163 selfloop transitions, 14 changer transitions 0/183 dead transitions. [2024-10-31 22:11:40,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 183 transitions, 1873 flow [2024-10-31 22:11:40,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:11:40,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:11:40,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-10-31 22:11:40,615 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37714285714285717 [2024-10-31 22:11:40,615 INFO L175 Difference]: Start difference. First operand has 103 places, 75 transitions, 576 flow. Second operand 7 states and 132 transitions. [2024-10-31 22:11:40,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 183 transitions, 1873 flow [2024-10-31 22:11:40,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 183 transitions, 1768 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-10-31 22:11:40,689 INFO L231 Difference]: Finished difference. Result has 103 places, 75 transitions, 571 flow [2024-10-31 22:11:40,689 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=571, PETRI_PLACES=103, PETRI_TRANSITIONS=75} [2024-10-31 22:11:40,690 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 51 predicate places. [2024-10-31 22:11:40,690 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 75 transitions, 571 flow [2024-10-31 22:11:40,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.4) internal successors, (228), 20 states have internal predecessors, (228), 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 22:11:40,690 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:40,690 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:40,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-31 22:11:40,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-31 22:11:40,891 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:11:40,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:40,892 INFO L85 PathProgramCache]: Analyzing trace with hash 464008335, now seen corresponding path program 2 times [2024-10-31 22:11:40,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:40,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8470826] [2024-10-31 22:11:40,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:40,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:41,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:41,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8470826] [2024-10-31 22:11:41,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8470826] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:41,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810213129] [2024-10-31 22:11:41,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:11:41,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:41,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:41,176 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:41,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05903082-23cf-4d6b-b71c-2c80b2cad550/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-31 22:11:41,276 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:11:41,277 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:11:41,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-31 22:11:41,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:41,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9