./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5bb11505151393f96d52a572beff0352326876d897656a8082ae272a8f39e0b4 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 18:20:06,695 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 18:20:06,785 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 18:20:06,790 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 18:20:06,790 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 18:20:06,827 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 18:20:06,829 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 18:20:06,830 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 18:20:06,831 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 18:20:06,832 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 18:20:06,834 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 18:20:06,835 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 18:20:06,835 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 18:20:06,836 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 18:20:06,836 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 18:20:06,837 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 18:20:06,840 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 18:20:06,841 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 18:20:06,841 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 18:20:06,841 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 18:20:06,842 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 18:20:06,842 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 18:20:06,843 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 18:20:06,843 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 18:20:06,843 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 18:20:06,845 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 18:20:06,846 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 18:20:06,846 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 18:20:06,846 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 18:20:06,847 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 18:20:06,847 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 18:20:06,847 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 18:20:06,848 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 18:20:06,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:20:06,849 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 18:20:06,849 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 18:20:06,850 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 18:20:06,850 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 18:20:06,851 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 18:20:06,863 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 18:20:06,863 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 18:20:06,864 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 18:20:06,864 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_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bb11505151393f96d52a572beff0352326876d897656a8082ae272a8f39e0b4 [2024-11-08 18:20:07,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 18:20:07,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 18:20:07,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 18:20:07,188 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 18:20:07,189 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 18:20:07,190 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c Unable to find full path for "g++" [2024-11-08 18:20:09,373 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 18:20:09,568 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 18:20:09,569 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2024-11-08 18:20:09,577 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/data/a17baf9d1/7ef2eff7b1cf40b49c6a3e91c11d1d0a/FLAGb6e7bd400 [2024-11-08 18:20:09,594 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/data/a17baf9d1/7ef2eff7b1cf40b49c6a3e91c11d1d0a [2024-11-08 18:20:09,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 18:20:09,598 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 18:20:09,600 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 18:20:09,600 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 18:20:09,606 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 18:20:09,607 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:20:09" (1/1) ... [2024-11-08 18:20:09,608 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ad8038a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:20:09, skipping insertion in model container [2024-11-08 18:20:09,608 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:20:09" (1/1) ... [2024-11-08 18:20:09,633 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 18:20:09,883 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 18:20:09,888 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:20:09,898 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 18:20:09,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:20:09,947 INFO L204 MainTranslator]: Completed translation [2024-11-08 18:20:09,948 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:20:09 WrapperNode [2024-11-08 18:20:09,948 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 18:20:09,949 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 18:20:09,953 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 18:20:09,953 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 18:20:09,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:20:09" (1/1) ... [2024-11-08 18:20:09,978 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:20:09" (1/1) ... [2024-11-08 18:20:10,009 INFO L138 Inliner]: procedures = 25, calls = 35, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 266 [2024-11-08 18:20:10,009 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 18:20:10,010 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 18:20:10,010 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 18:20:10,010 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 18:20:10,023 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:20:09" (1/1) ... [2024-11-08 18:20:10,024 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:20:09" (1/1) ... [2024-11-08 18:20:10,032 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:20:09" (1/1) ... [2024-11-08 18:20:10,065 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-08 18:20:10,065 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:20:09" (1/1) ... [2024-11-08 18:20:10,066 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:20:09" (1/1) ... [2024-11-08 18:20:10,075 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:20:09" (1/1) ... [2024-11-08 18:20:10,080 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:20:09" (1/1) ... [2024-11-08 18:20:10,082 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:20:09" (1/1) ... [2024-11-08 18:20:10,083 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:20:09" (1/1) ... [2024-11-08 18:20:10,087 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 18:20:10,088 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 18:20:10,088 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 18:20:10,088 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 18:20:10,089 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:20:09" (1/1) ... [2024-11-08 18:20:10,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:20:10,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:20:10,122 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 18:20:10,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 18:20:10,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 18:20:10,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 18:20:10,149 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 18:20:10,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 18:20:10,149 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 18:20:10,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-08 18:20:10,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-08 18:20:10,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 18:20:10,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 18:20:10,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 18:20:10,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 18:20:10,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 18:20:10,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 18:20:10,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 18:20:10,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 18:20:10,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 18:20:10,153 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 18:20:10,281 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 18:20:10,284 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 18:20:10,882 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 18:20:10,882 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 18:20:11,383 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 18:20:11,383 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 18:20:11,384 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:20:11 BoogieIcfgContainer [2024-11-08 18:20:11,384 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 18:20:11,388 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 18:20:11,388 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 18:20:11,392 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 18:20:11,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 06:20:09" (1/3) ... [2024-11-08 18:20:11,393 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a46a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:20:11, skipping insertion in model container [2024-11-08 18:20:11,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:20:09" (2/3) ... [2024-11-08 18:20:11,394 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a46a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:20:11, skipping insertion in model container [2024-11-08 18:20:11,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:20:11" (3/3) ... [2024-11-08 18:20:11,396 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2024-11-08 18:20:11,410 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 18:20:11,410 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-11-08 18:20:11,410 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 18:20:11,501 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-08 18:20:11,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 102 transitions, 225 flow [2024-11-08 18:20:11,601 INFO L124 PetriNetUnfolderBase]: 15/99 cut-off events. [2024-11-08 18:20:11,601 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-08 18:20:11,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 99 events. 15/99 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 295 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 73. Up to 3 conditions per place. [2024-11-08 18:20:11,608 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 102 transitions, 225 flow [2024-11-08 18:20:11,614 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 98 transitions, 214 flow [2024-11-08 18:20:11,623 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 18:20:11,630 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;@5d8b50a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 18:20:11,630 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-11-08 18:20:11,635 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 18:20:11,636 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-11-08 18:20:11,636 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 18:20:11,636 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:20:11,639 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:20:11,640 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:20:11,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:11,645 INFO L85 PathProgramCache]: Analyzing trace with hash 26719627, now seen corresponding path program 1 times [2024-11-08 18:20:11,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:11,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832480149] [2024-11-08 18:20:11,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:11,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:20:11,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:20:11,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832480149] [2024-11-08 18:20:11,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832480149] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:20:11,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:20:11,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 18:20:11,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743662126] [2024-11-08 18:20:11,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:20:11,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:20:11,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:12,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:20:12,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:20:12,114 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 102 [2024-11-08 18:20:12,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 98 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:12,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:20:12,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 102 [2024-11-08 18:20:12,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:20:12,507 INFO L124 PetriNetUnfolderBase]: 930/1614 cut-off events. [2024-11-08 18:20:12,508 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-11-08 18:20:12,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2930 conditions, 1614 events. 930/1614 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8849 event pairs, 543 based on Foata normal form. 1/1101 useless extension candidates. Maximal degree in co-relation 2661. Up to 1218 conditions per place. [2024-11-08 18:20:12,535 INFO L140 encePairwiseOnDemand]: 96/102 looper letters, 33 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2024-11-08 18:20:12,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 93 transitions, 274 flow [2024-11-08 18:20:12,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:20:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:20:12,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2024-11-08 18:20:12,550 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7352941176470589 [2024-11-08 18:20:12,553 INFO L175 Difference]: Start difference. First operand has 93 places, 98 transitions, 214 flow. Second operand 3 states and 225 transitions. [2024-11-08 18:20:12,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 93 transitions, 274 flow [2024-11-08 18:20:12,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 93 transitions, 262 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 18:20:12,595 INFO L231 Difference]: Finished difference. Result has 84 places, 93 transitions, 196 flow [2024-11-08 18:20:12,600 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=84, PETRI_TRANSITIONS=93} [2024-11-08 18:20:12,603 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -9 predicate places. [2024-11-08 18:20:12,604 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 93 transitions, 196 flow [2024-11-08 18:20:12,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:12,605 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:20:12,605 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:20:12,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 18:20:12,606 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:20:12,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:12,607 INFO L85 PathProgramCache]: Analyzing trace with hash 26719628, now seen corresponding path program 1 times [2024-11-08 18:20:12,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:12,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865960867] [2024-11-08 18:20:12,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:12,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:20:13,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:20:13,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865960867] [2024-11-08 18:20:13,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865960867] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:20:13,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:20:13,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:20:13,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135617574] [2024-11-08 18:20:13,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:20:13,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:20:13,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:13,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:20:13,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:20:13,321 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 102 [2024-11-08 18:20:13,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 93 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:13,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:20:13,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 102 [2024-11-08 18:20:13,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:20:13,760 INFO L124 PetriNetUnfolderBase]: 930/1614 cut-off events. [2024-11-08 18:20:13,760 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-08 18:20:13,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2884 conditions, 1614 events. 930/1614 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8810 event pairs, 543 based on Foata normal form. 0/1095 useless extension candidates. Maximal degree in co-relation 2835. Up to 1233 conditions per place. [2024-11-08 18:20:13,777 INFO L140 encePairwiseOnDemand]: 97/102 looper letters, 42 selfloop transitions, 5 changer transitions 0/93 dead transitions. [2024-11-08 18:20:13,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 93 transitions, 290 flow [2024-11-08 18:20:13,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:20:13,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:20:13,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 260 transitions. [2024-11-08 18:20:13,780 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6372549019607843 [2024-11-08 18:20:13,781 INFO L175 Difference]: Start difference. First operand has 84 places, 93 transitions, 196 flow. Second operand 4 states and 260 transitions. [2024-11-08 18:20:13,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 93 transitions, 290 flow [2024-11-08 18:20:13,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 93 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:20:13,784 INFO L231 Difference]: Finished difference. Result has 84 places, 93 transitions, 202 flow [2024-11-08 18:20:13,784 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=84, PETRI_TRANSITIONS=93} [2024-11-08 18:20:13,785 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -9 predicate places. [2024-11-08 18:20:13,785 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 93 transitions, 202 flow [2024-11-08 18:20:13,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:13,785 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:20:13,786 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 18:20:13,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 18:20:13,786 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:20:13,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:13,787 INFO L85 PathProgramCache]: Analyzing trace with hash -95545865, now seen corresponding path program 1 times [2024-11-08 18:20:13,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:13,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444665452] [2024-11-08 18:20:13,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:13,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:20:14,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:20:14,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444665452] [2024-11-08 18:20:14,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444665452] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:20:14,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:20:14,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:20:14,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151403998] [2024-11-08 18:20:14,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:20:14,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 18:20:14,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:14,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 18:20:14,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-08 18:20:14,483 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 102 [2024-11-08 18:20:14,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 93 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:14,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:20:14,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 102 [2024-11-08 18:20:14,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:20:14,898 INFO L124 PetriNetUnfolderBase]: 934/1628 cut-off events. [2024-11-08 18:20:14,898 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-08 18:20:14,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2919 conditions, 1628 events. 934/1628 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8864 event pairs, 543 based on Foata normal form. 0/1107 useless extension candidates. Maximal degree in co-relation 2877. Up to 1239 conditions per place. [2024-11-08 18:20:14,916 INFO L140 encePairwiseOnDemand]: 94/102 looper letters, 51 selfloop transitions, 10 changer transitions 0/107 dead transitions. [2024-11-08 18:20:14,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 107 transitions, 360 flow [2024-11-08 18:20:14,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:20:14,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:20:14,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 326 transitions. [2024-11-08 18:20:14,919 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6392156862745098 [2024-11-08 18:20:14,919 INFO L175 Difference]: Start difference. First operand has 84 places, 93 transitions, 202 flow. Second operand 5 states and 326 transitions. [2024-11-08 18:20:14,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 107 transitions, 360 flow [2024-11-08 18:20:14,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 107 transitions, 355 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:20:14,924 INFO L231 Difference]: Finished difference. Result has 90 places, 101 transitions, 274 flow [2024-11-08 18:20:14,925 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=90, PETRI_TRANSITIONS=101} [2024-11-08 18:20:14,926 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -3 predicate places. [2024-11-08 18:20:14,926 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 101 transitions, 274 flow [2024-11-08 18:20:14,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:14,927 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:20:14,927 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:20:14,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 18:20:14,927 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:20:14,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:14,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1625977420, now seen corresponding path program 1 times [2024-11-08 18:20:14,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:14,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377170234] [2024-11-08 18:20:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:14,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:20:15,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:20:15,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377170234] [2024-11-08 18:20:15,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377170234] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:20:15,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:20:15,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:20:15,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615419136] [2024-11-08 18:20:15,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:20:15,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 18:20:15,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:15,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 18:20:15,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-08 18:20:15,679 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 102 [2024-11-08 18:20:15,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 101 transitions, 274 flow. Second operand has 6 states, 6 states have (on average 54.333333333333336) internal successors, (326), 6 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:15,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:20:15,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 102 [2024-11-08 18:20:15,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:20:16,043 INFO L124 PetriNetUnfolderBase]: 936/1635 cut-off events. [2024-11-08 18:20:16,043 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-08 18:20:16,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2958 conditions, 1635 events. 936/1635 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8896 event pairs, 543 based on Foata normal form. 0/1114 useless extension candidates. Maximal degree in co-relation 2878. Up to 1247 conditions per place. [2024-11-08 18:20:16,060 INFO L140 encePairwiseOnDemand]: 93/102 looper letters, 53 selfloop transitions, 12 changer transitions 0/111 dead transitions. [2024-11-08 18:20:16,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 111 transitions, 424 flow [2024-11-08 18:20:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:20:16,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:20:16,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 326 transitions. [2024-11-08 18:20:16,062 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6392156862745098 [2024-11-08 18:20:16,062 INFO L175 Difference]: Start difference. First operand has 90 places, 101 transitions, 274 flow. Second operand 5 states and 326 transitions. [2024-11-08 18:20:16,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 111 transitions, 424 flow [2024-11-08 18:20:16,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 111 transitions, 423 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:20:16,069 INFO L231 Difference]: Finished difference. Result has 95 places, 105 transitions, 327 flow [2024-11-08 18:20:16,069 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=327, PETRI_PLACES=95, PETRI_TRANSITIONS=105} [2024-11-08 18:20:16,070 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 2 predicate places. [2024-11-08 18:20:16,071 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 105 transitions, 327 flow [2024-11-08 18:20:16,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.333333333333336) internal successors, (326), 6 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:16,071 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:20:16,072 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-08 18:20:16,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 18:20:16,072 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:20:16,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:16,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1157274009, now seen corresponding path program 1 times [2024-11-08 18:20:16,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:16,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332812583] [2024-11-08 18:20:16,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:16,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:20:16,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:20:16,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332812583] [2024-11-08 18:20:16,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332812583] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:20:16,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648718393] [2024-11-08 18:20:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:16,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:20:16,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:20:16,443 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:20:16,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 18:20:16,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:16,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 18:20:16,587 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:20:16,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 18:20:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:20:16,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:20:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:20:17,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648718393] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:20:17,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:20:17,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-08 18:20:17,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646529351] [2024-11-08 18:20:17,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:20:17,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 18:20:17,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:17,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 18:20:17,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-08 18:20:18,723 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 102 [2024-11-08 18:20:18,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 105 transitions, 327 flow. Second operand has 14 states, 14 states have (on average 54.785714285714285) internal successors, (767), 14 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:18,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:20:18,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 102 [2024-11-08 18:20:18,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:20:19,449 INFO L124 PetriNetUnfolderBase]: 936/1641 cut-off events. [2024-11-08 18:20:19,449 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-11-08 18:20:19,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3003 conditions, 1641 events. 936/1641 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8957 event pairs, 543 based on Foata normal form. 0/1125 useless extension candidates. Maximal degree in co-relation 2905. Up to 1230 conditions per place. [2024-11-08 18:20:19,464 INFO L140 encePairwiseOnDemand]: 89/102 looper letters, 46 selfloop transitions, 25 changer transitions 0/117 dead transitions. [2024-11-08 18:20:19,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 117 transitions, 508 flow [2024-11-08 18:20:19,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 18:20:19,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 18:20:19,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 603 transitions. [2024-11-08 18:20:19,467 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5911764705882353 [2024-11-08 18:20:19,467 INFO L175 Difference]: Start difference. First operand has 95 places, 105 transitions, 327 flow. Second operand 10 states and 603 transitions. [2024-11-08 18:20:19,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 117 transitions, 508 flow [2024-11-08 18:20:19,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 117 transitions, 507 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:20:19,473 INFO L231 Difference]: Finished difference. Result has 104 places, 109 transitions, 415 flow [2024-11-08 18:20:19,476 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=415, PETRI_PLACES=104, PETRI_TRANSITIONS=109} [2024-11-08 18:20:19,477 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 11 predicate places. [2024-11-08 18:20:19,477 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 109 transitions, 415 flow [2024-11-08 18:20:19,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.785714285714285) internal successors, (767), 14 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:19,478 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:20:19,478 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:20:19,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 18:20:19,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:20:19,679 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:20:19,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:19,679 INFO L85 PathProgramCache]: Analyzing trace with hash -851317288, now seen corresponding path program 1 times [2024-11-08 18:20:19,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:19,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904132375] [2024-11-08 18:20:19,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:19,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:20:19,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:20:19,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904132375] [2024-11-08 18:20:19,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904132375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:20:19,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765720669] [2024-11-08 18:20:19,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:19,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:20:19,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:20:19,976 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:20:19,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 18:20:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:20,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 18:20:20,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:20:20,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:20:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:20:20,266 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:20:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:20:20,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765720669] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:20:20,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:20:20,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-08 18:20:20,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351247334] [2024-11-08 18:20:20,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:20:20,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 18:20:20,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:20,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 18:20:20,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-08 18:20:21,579 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 102 [2024-11-08 18:20:21,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 109 transitions, 415 flow. Second operand has 14 states, 14 states have (on average 55.07142857142857) internal successors, (771), 14 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:21,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:20:21,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 102 [2024-11-08 18:20:21,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:20:22,375 INFO L124 PetriNetUnfolderBase]: 936/1644 cut-off events. [2024-11-08 18:20:22,375 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-11-08 18:20:22,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3049 conditions, 1644 events. 936/1644 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9009 event pairs, 543 based on Foata normal form. 2/1135 useless extension candidates. Maximal degree in co-relation 2994. Up to 1233 conditions per place. [2024-11-08 18:20:22,391 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 46 selfloop transitions, 27 changer transitions 0/119 dead transitions. [2024-11-08 18:20:22,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 119 transitions, 591 flow [2024-11-08 18:20:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 18:20:22,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 18:20:22,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 600 transitions. [2024-11-08 18:20:22,394 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2024-11-08 18:20:22,394 INFO L175 Difference]: Start difference. First operand has 104 places, 109 transitions, 415 flow. Second operand 10 states and 600 transitions. [2024-11-08 18:20:22,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 119 transitions, 591 flow [2024-11-08 18:20:22,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 119 transitions, 518 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-11-08 18:20:22,402 INFO L231 Difference]: Finished difference. Result has 106 places, 111 transitions, 422 flow [2024-11-08 18:20:22,403 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=422, PETRI_PLACES=106, PETRI_TRANSITIONS=111} [2024-11-08 18:20:22,405 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 13 predicate places. [2024-11-08 18:20:22,405 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 111 transitions, 422 flow [2024-11-08 18:20:22,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 55.07142857142857) internal successors, (771), 14 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:22,407 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:20:22,407 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:20:22,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 18:20:22,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-08 18:20:22,608 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:20:22,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:22,608 INFO L85 PathProgramCache]: Analyzing trace with hash 297457082, now seen corresponding path program 1 times [2024-11-08 18:20:22,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:22,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938361486] [2024-11-08 18:20:22,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:22,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:20:22,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:20:22,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938361486] [2024-11-08 18:20:22,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938361486] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:20:22,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:20:22,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:20:22,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051070742] [2024-11-08 18:20:22,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:20:22,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:20:22,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:22,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:20:22,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:20:22,791 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 102 [2024-11-08 18:20:22,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 111 transitions, 422 flow. Second operand has 5 states, 5 states have (on average 56.2) internal successors, (281), 5 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:22,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:20:22,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 102 [2024-11-08 18:20:22,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:20:23,313 INFO L124 PetriNetUnfolderBase]: 1803/3269 cut-off events. [2024-11-08 18:20:23,314 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2024-11-08 18:20:23,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5933 conditions, 3269 events. 1803/3269 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20874 event pairs, 810 based on Foata normal form. 62/2428 useless extension candidates. Maximal degree in co-relation 5869. Up to 1708 conditions per place. [2024-11-08 18:20:23,348 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 115 selfloop transitions, 19 changer transitions 0/178 dead transitions. [2024-11-08 18:20:23,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 178 transitions, 938 flow [2024-11-08 18:20:23,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:20:23,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:20:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 431 transitions. [2024-11-08 18:20:23,352 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.704248366013072 [2024-11-08 18:20:23,352 INFO L175 Difference]: Start difference. First operand has 106 places, 111 transitions, 422 flow. Second operand 6 states and 431 transitions. [2024-11-08 18:20:23,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 178 transitions, 938 flow [2024-11-08 18:20:23,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 178 transitions, 818 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-11-08 18:20:23,357 INFO L231 Difference]: Finished difference. Result has 107 places, 127 transitions, 528 flow [2024-11-08 18:20:23,357 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=528, PETRI_PLACES=107, PETRI_TRANSITIONS=127} [2024-11-08 18:20:23,358 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 14 predicate places. [2024-11-08 18:20:23,358 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 127 transitions, 528 flow [2024-11-08 18:20:23,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.2) internal successors, (281), 5 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:23,359 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:20:23,359 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:20:23,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 18:20:23,359 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:20:23,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:23,360 INFO L85 PathProgramCache]: Analyzing trace with hash 38542922, now seen corresponding path program 1 times [2024-11-08 18:20:23,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:23,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649761595] [2024-11-08 18:20:23,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:23,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:20:23,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:20:23,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649761595] [2024-11-08 18:20:23,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649761595] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:20:23,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:20:23,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:20:23,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369408701] [2024-11-08 18:20:23,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:20:23,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:20:23,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:23,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:20:23,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:20:23,580 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2024-11-08 18:20:23,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 127 transitions, 528 flow. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:23,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:20:23,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2024-11-08 18:20:23,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:20:24,190 INFO L124 PetriNetUnfolderBase]: 2181/4092 cut-off events. [2024-11-08 18:20:24,191 INFO L125 PetriNetUnfolderBase]: For 482/482 co-relation queries the response was YES. [2024-11-08 18:20:24,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7510 conditions, 4092 events. 2181/4092 cut-off events. For 482/482 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 28231 event pairs, 1429 based on Foata normal form. 0/2926 useless extension candidates. Maximal degree in co-relation 7450. Up to 2918 conditions per place. [2024-11-08 18:20:24,219 INFO L140 encePairwiseOnDemand]: 95/102 looper letters, 51 selfloop transitions, 13 changer transitions 0/123 dead transitions. [2024-11-08 18:20:24,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 123 transitions, 648 flow [2024-11-08 18:20:24,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:20:24,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:20:24,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 317 transitions. [2024-11-08 18:20:24,221 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6215686274509804 [2024-11-08 18:20:24,221 INFO L175 Difference]: Start difference. First operand has 107 places, 127 transitions, 528 flow. Second operand 5 states and 317 transitions. [2024-11-08 18:20:24,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 123 transitions, 648 flow [2024-11-08 18:20:24,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 123 transitions, 642 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-08 18:20:24,225 INFO L231 Difference]: Finished difference. Result has 106 places, 123 transitions, 540 flow [2024-11-08 18:20:24,226 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=540, PETRI_PLACES=106, PETRI_TRANSITIONS=123} [2024-11-08 18:20:24,229 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 13 predicate places. [2024-11-08 18:20:24,229 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 123 transitions, 540 flow [2024-11-08 18:20:24,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:24,230 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:20:24,230 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:20:24,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 18:20:24,231 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:20:24,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:24,231 INFO L85 PathProgramCache]: Analyzing trace with hash 38542923, now seen corresponding path program 1 times [2024-11-08 18:20:24,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:24,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002750492] [2024-11-08 18:20:24,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:24,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:20:24,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:20:24,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002750492] [2024-11-08 18:20:24,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002750492] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:20:24,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:20:24,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 18:20:24,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994853724] [2024-11-08 18:20:24,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:20:24,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:20:24,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:24,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:20:24,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:20:24,398 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 102 [2024-11-08 18:20:24,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 123 transitions, 540 flow. Second operand has 5 states, 5 states have (on average 59.6) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:24,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:20:24,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 102 [2024-11-08 18:20:24,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:20:25,097 INFO L124 PetriNetUnfolderBase]: 2757/5292 cut-off events. [2024-11-08 18:20:25,097 INFO L125 PetriNetUnfolderBase]: For 692/692 co-relation queries the response was YES. [2024-11-08 18:20:25,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9774 conditions, 5292 events. 2757/5292 cut-off events. For 692/692 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 38986 event pairs, 1356 based on Foata normal form. 106/4038 useless extension candidates. Maximal degree in co-relation 9711. Up to 2743 conditions per place. [2024-11-08 18:20:25,139 INFO L140 encePairwiseOnDemand]: 94/102 looper letters, 112 selfloop transitions, 15 changer transitions 0/180 dead transitions. [2024-11-08 18:20:25,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 180 transitions, 996 flow [2024-11-08 18:20:25,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:20:25,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:20:25,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 435 transitions. [2024-11-08 18:20:25,141 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7107843137254902 [2024-11-08 18:20:25,141 INFO L175 Difference]: Start difference. First operand has 106 places, 123 transitions, 540 flow. Second operand 6 states and 435 transitions. [2024-11-08 18:20:25,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 180 transitions, 996 flow [2024-11-08 18:20:25,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 180 transitions, 970 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:20:25,147 INFO L231 Difference]: Finished difference. Result has 112 places, 131 transitions, 638 flow [2024-11-08 18:20:25,148 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=638, PETRI_PLACES=112, PETRI_TRANSITIONS=131} [2024-11-08 18:20:25,148 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 19 predicate places. [2024-11-08 18:20:25,148 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 131 transitions, 638 flow [2024-11-08 18:20:25,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.6) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:25,149 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:20:25,149 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:20:25,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-08 18:20:25,150 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:20:25,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:25,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1266566510, now seen corresponding path program 1 times [2024-11-08 18:20:25,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:25,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700009907] [2024-11-08 18:20:25,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:25,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:20:25,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:20:25,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700009907] [2024-11-08 18:20:25,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700009907] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:20:25,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:20:25,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 18:20:25,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944585558] [2024-11-08 18:20:25,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:20:25,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:20:25,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:25,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:20:25,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:20:25,311 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 102 [2024-11-08 18:20:25,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 131 transitions, 638 flow. Second operand has 5 states, 5 states have (on average 59.6) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:25,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:20:25,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 102 [2024-11-08 18:20:25,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:20:25,937 INFO L124 PetriNetUnfolderBase]: 2289/4327 cut-off events. [2024-11-08 18:20:25,937 INFO L125 PetriNetUnfolderBase]: For 1007/1007 co-relation queries the response was YES. [2024-11-08 18:20:25,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8476 conditions, 4327 events. 2289/4327 cut-off events. For 1007/1007 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 30177 event pairs, 1156 based on Foata normal form. 38/3279 useless extension candidates. Maximal degree in co-relation 8407. Up to 2428 conditions per place. [2024-11-08 18:20:25,969 INFO L140 encePairwiseOnDemand]: 94/102 looper letters, 105 selfloop transitions, 16 changer transitions 0/174 dead transitions. [2024-11-08 18:20:25,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 174 transitions, 1016 flow [2024-11-08 18:20:25,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:20:25,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:20:25,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 430 transitions. [2024-11-08 18:20:25,971 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7026143790849673 [2024-11-08 18:20:25,971 INFO L175 Difference]: Start difference. First operand has 112 places, 131 transitions, 638 flow. Second operand 6 states and 430 transitions. [2024-11-08 18:20:25,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 174 transitions, 1016 flow [2024-11-08 18:20:25,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 174 transitions, 994 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-08 18:20:25,977 INFO L231 Difference]: Finished difference. Result has 116 places, 133 transitions, 674 flow [2024-11-08 18:20:25,978 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=674, PETRI_PLACES=116, PETRI_TRANSITIONS=133} [2024-11-08 18:20:25,978 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 23 predicate places. [2024-11-08 18:20:25,979 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 133 transitions, 674 flow [2024-11-08 18:20:25,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.6) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:25,979 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:20:25,979 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:20:25,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 18:20:25,979 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:20:25,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:25,980 INFO L85 PathProgramCache]: Analyzing trace with hash -688503731, now seen corresponding path program 1 times [2024-11-08 18:20:25,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:25,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34398946] [2024-11-08 18:20:25,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:25,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:20:26,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:20:26,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34398946] [2024-11-08 18:20:26,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34398946] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:20:26,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:20:26,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:20:26,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142483016] [2024-11-08 18:20:26,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:20:26,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:20:26,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:26,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:20:26,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:20:26,159 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 102 [2024-11-08 18:20:26,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 133 transitions, 674 flow. Second operand has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:26,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:20:26,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 102 [2024-11-08 18:20:26,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:20:26,746 INFO L124 PetriNetUnfolderBase]: 1907/4027 cut-off events. [2024-11-08 18:20:26,746 INFO L125 PetriNetUnfolderBase]: For 1586/1586 co-relation queries the response was YES. [2024-11-08 18:20:26,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7843 conditions, 4027 events. 1907/4027 cut-off events. For 1586/1586 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 30085 event pairs, 1029 based on Foata normal form. 58/3106 useless extension candidates. Maximal degree in co-relation 7724. Up to 2058 conditions per place. [2024-11-08 18:20:26,778 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 117 selfloop transitions, 22 changer transitions 0/179 dead transitions. [2024-11-08 18:20:26,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 179 transitions, 1110 flow [2024-11-08 18:20:26,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:20:26,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:20:26,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 423 transitions. [2024-11-08 18:20:26,780 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6911764705882353 [2024-11-08 18:20:26,781 INFO L175 Difference]: Start difference. First operand has 116 places, 133 transitions, 674 flow. Second operand 6 states and 423 transitions. [2024-11-08 18:20:26,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 179 transitions, 1110 flow [2024-11-08 18:20:26,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 179 transitions, 1084 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:20:26,787 INFO L231 Difference]: Finished difference. Result has 120 places, 134 transitions, 721 flow [2024-11-08 18:20:26,788 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=721, PETRI_PLACES=120, PETRI_TRANSITIONS=134} [2024-11-08 18:20:26,788 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 27 predicate places. [2024-11-08 18:20:26,788 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 134 transitions, 721 flow [2024-11-08 18:20:26,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:26,789 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:20:26,789 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:20:26,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-08 18:20:26,789 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:20:26,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:26,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1189879827, now seen corresponding path program 1 times [2024-11-08 18:20:26,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:26,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776895088] [2024-11-08 18:20:26,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:26,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:20:26,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:20:26,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776895088] [2024-11-08 18:20:26,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776895088] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:20:26,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:20:26,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 18:20:26,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553585274] [2024-11-08 18:20:26,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:20:26,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:20:26,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:26,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:20:26,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:20:26,981 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 102 [2024-11-08 18:20:26,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 134 transitions, 721 flow. Second operand has 5 states, 5 states have (on average 60.0) internal successors, (300), 5 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:26,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:20:26,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 102 [2024-11-08 18:20:26,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:20:27,824 INFO L124 PetriNetUnfolderBase]: 2940/6335 cut-off events. [2024-11-08 18:20:27,825 INFO L125 PetriNetUnfolderBase]: For 3185/3185 co-relation queries the response was YES. [2024-11-08 18:20:27,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12769 conditions, 6335 events. 2940/6335 cut-off events. For 3185/3185 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 51839 event pairs, 1504 based on Foata normal form. 92/4915 useless extension candidates. Maximal degree in co-relation 12645. Up to 2741 conditions per place. [2024-11-08 18:20:27,878 INFO L140 encePairwiseOnDemand]: 95/102 looper letters, 106 selfloop transitions, 22 changer transitions 0/181 dead transitions. [2024-11-08 18:20:27,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 181 transitions, 1145 flow [2024-11-08 18:20:27,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:20:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:20:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 426 transitions. [2024-11-08 18:20:27,882 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.696078431372549 [2024-11-08 18:20:27,882 INFO L175 Difference]: Start difference. First operand has 120 places, 134 transitions, 721 flow. Second operand 6 states and 426 transitions. [2024-11-08 18:20:27,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 181 transitions, 1145 flow [2024-11-08 18:20:27,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 181 transitions, 1120 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:20:27,900 INFO L231 Difference]: Finished difference. Result has 125 places, 137 transitions, 784 flow [2024-11-08 18:20:27,900 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=784, PETRI_PLACES=125, PETRI_TRANSITIONS=137} [2024-11-08 18:20:27,901 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 32 predicate places. [2024-11-08 18:20:27,901 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 137 transitions, 784 flow [2024-11-08 18:20:27,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.0) internal successors, (300), 5 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:27,902 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:20:27,902 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:20:27,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-08 18:20:27,902 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:20:27,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:27,903 INFO L85 PathProgramCache]: Analyzing trace with hash 2095801348, now seen corresponding path program 1 times [2024-11-08 18:20:27,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:27,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094061550] [2024-11-08 18:20:27,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:27,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:20:28,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:20:28,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094061550] [2024-11-08 18:20:28,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094061550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:20:28,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484894157] [2024-11-08 18:20:28,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:28,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:20:28,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:20:28,284 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:20:28,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 18:20:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:28,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 18:20:28,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:20:28,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:20:28,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:20:28,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 18:20:28,498 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-08 18:20:28,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-08 18:20:28,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:20:28,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 18:20:28,567 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:20:28,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 18:20:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:20:28,630 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:20:28,963 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 100 treesize of output 96 [2024-11-08 18:20:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:20:29,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484894157] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:20:29,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:20:29,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2024-11-08 18:20:29,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817736175] [2024-11-08 18:20:29,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:20:29,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 18:20:29,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:29,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 18:20:29,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-11-08 18:20:31,310 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 102 [2024-11-08 18:20:31,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 137 transitions, 784 flow. Second operand has 17 states, 17 states have (on average 53.88235294117647) internal successors, (916), 17 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:31,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:20:31,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 102 [2024-11-08 18:20:31,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:20:33,465 INFO L124 PetriNetUnfolderBase]: 6711/12180 cut-off events. [2024-11-08 18:20:33,465 INFO L125 PetriNetUnfolderBase]: For 6851/6851 co-relation queries the response was YES. [2024-11-08 18:20:33,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25845 conditions, 12180 events. 6711/12180 cut-off events. For 6851/6851 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 93383 event pairs, 2271 based on Foata normal form. 0/10054 useless extension candidates. Maximal degree in co-relation 25712. Up to 3788 conditions per place. [2024-11-08 18:20:33,562 INFO L140 encePairwiseOnDemand]: 86/102 looper letters, 131 selfloop transitions, 31 changer transitions 0/216 dead transitions. [2024-11-08 18:20:33,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 216 transitions, 1360 flow [2024-11-08 18:20:33,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 18:20:33,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 18:20:33,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 610 transitions. [2024-11-08 18:20:33,564 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.664488017429194 [2024-11-08 18:20:33,564 INFO L175 Difference]: Start difference. First operand has 125 places, 137 transitions, 784 flow. Second operand 9 states and 610 transitions. [2024-11-08 18:20:33,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 216 transitions, 1360 flow [2024-11-08 18:20:33,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 216 transitions, 1332 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-08 18:20:33,585 INFO L231 Difference]: Finished difference. Result has 127 places, 136 transitions, 840 flow [2024-11-08 18:20:33,586 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=840, PETRI_PLACES=127, PETRI_TRANSITIONS=136} [2024-11-08 18:20:33,586 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 34 predicate places. [2024-11-08 18:20:33,586 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 136 transitions, 840 flow [2024-11-08 18:20:33,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 53.88235294117647) internal successors, (916), 17 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:33,587 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:20:33,587 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:20:33,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 18:20:33,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 18:20:33,788 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:20:33,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:33,789 INFO L85 PathProgramCache]: Analyzing trace with hash 545333187, now seen corresponding path program 1 times [2024-11-08 18:20:33,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:33,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874671582] [2024-11-08 18:20:33,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:33,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:20:34,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:20:34,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874671582] [2024-11-08 18:20:34,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874671582] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:20:34,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108189460] [2024-11-08 18:20:34,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:34,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:20:34,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:20:34,151 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:20:34,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 18:20:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:34,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 18:20:34,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:20:34,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:20:34,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:20:34,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 18:20:34,388 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:20:34,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 18:20:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:20:34,453 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:20:34,599 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 52 treesize of output 48 [2024-11-08 18:20:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:20:34,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108189460] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:20:34,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:20:34,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-08 18:20:34,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496098285] [2024-11-08 18:20:34,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:20:34,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 18:20:34,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:34,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 18:20:34,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-08 18:20:35,800 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 102 [2024-11-08 18:20:35,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 136 transitions, 840 flow. Second operand has 13 states, 13 states have (on average 60.92307692307692) internal successors, (792), 13 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:35,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:20:35,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 102 [2024-11-08 18:20:35,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:20:37,418 INFO L124 PetriNetUnfolderBase]: 4668/8913 cut-off events. [2024-11-08 18:20:37,418 INFO L125 PetriNetUnfolderBase]: For 6925/6925 co-relation queries the response was YES. [2024-11-08 18:20:37,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19592 conditions, 8913 events. 4668/8913 cut-off events. For 6925/6925 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 67938 event pairs, 1564 based on Foata normal form. 0/7381 useless extension candidates. Maximal degree in co-relation 15994. Up to 2366 conditions per place. [2024-11-08 18:20:37,478 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 120 selfloop transitions, 35 changer transitions 0/212 dead transitions. [2024-11-08 18:20:37,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 212 transitions, 1394 flow [2024-11-08 18:20:37,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 18:20:37,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 18:20:37,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 649 transitions. [2024-11-08 18:20:37,480 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7069716775599129 [2024-11-08 18:20:37,481 INFO L175 Difference]: Start difference. First operand has 127 places, 136 transitions, 840 flow. Second operand 9 states and 649 transitions. [2024-11-08 18:20:37,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 212 transitions, 1394 flow [2024-11-08 18:20:37,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 212 transitions, 1367 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-11-08 18:20:37,504 INFO L231 Difference]: Finished difference. Result has 135 places, 140 transitions, 929 flow [2024-11-08 18:20:37,504 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=929, PETRI_PLACES=135, PETRI_TRANSITIONS=140} [2024-11-08 18:20:37,505 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 42 predicate places. [2024-11-08 18:20:37,505 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 140 transitions, 929 flow [2024-11-08 18:20:37,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 60.92307692307692) internal successors, (792), 13 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:37,505 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:20:37,505 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:20:37,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 18:20:37,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 18:20:37,710 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:20:37,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:37,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1066335525, now seen corresponding path program 1 times [2024-11-08 18:20:37,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:37,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410822688] [2024-11-08 18:20:37,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:37,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:20:37,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:20:37,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410822688] [2024-11-08 18:20:37,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410822688] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:20:37,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:20:37,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 18:20:37,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629175298] [2024-11-08 18:20:37,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:20:37,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:20:37,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:37,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:20:37,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:20:37,885 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 102 [2024-11-08 18:20:37,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 140 transitions, 929 flow. Second operand has 5 states, 5 states have (on average 60.4) internal successors, (302), 5 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:37,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:20:37,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 102 [2024-11-08 18:20:37,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:20:38,855 INFO L124 PetriNetUnfolderBase]: 4023/7955 cut-off events. [2024-11-08 18:20:38,855 INFO L125 PetriNetUnfolderBase]: For 8231/8267 co-relation queries the response was YES. [2024-11-08 18:20:38,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18188 conditions, 7955 events. 4023/7955 cut-off events. For 8231/8267 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 60985 event pairs, 2432 based on Foata normal form. 94/6712 useless extension candidates. Maximal degree in co-relation 14316. Up to 4260 conditions per place. [2024-11-08 18:20:38,946 INFO L140 encePairwiseOnDemand]: 95/102 looper letters, 108 selfloop transitions, 22 changer transitions 0/179 dead transitions. [2024-11-08 18:20:38,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 179 transitions, 1395 flow [2024-11-08 18:20:38,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:20:38,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:20:38,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 419 transitions. [2024-11-08 18:20:38,950 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.684640522875817 [2024-11-08 18:20:38,951 INFO L175 Difference]: Start difference. First operand has 135 places, 140 transitions, 929 flow. Second operand 6 states and 419 transitions. [2024-11-08 18:20:38,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 179 transitions, 1395 flow [2024-11-08 18:20:38,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 179 transitions, 1326 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-08 18:20:38,985 INFO L231 Difference]: Finished difference. Result has 137 places, 142 transitions, 946 flow [2024-11-08 18:20:38,985 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=946, PETRI_PLACES=137, PETRI_TRANSITIONS=142} [2024-11-08 18:20:38,986 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 44 predicate places. [2024-11-08 18:20:38,986 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 142 transitions, 946 flow [2024-11-08 18:20:38,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.4) internal successors, (302), 5 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:38,987 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:20:38,987 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:20:38,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-08 18:20:38,987 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:20:38,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:38,988 INFO L85 PathProgramCache]: Analyzing trace with hash -34662771, now seen corresponding path program 1 times [2024-11-08 18:20:38,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:38,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755629993] [2024-11-08 18:20:38,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:38,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:20:39,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:20:39,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755629993] [2024-11-08 18:20:39,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755629993] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:20:39,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335642019] [2024-11-08 18:20:39,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:39,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:20:39,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:20:39,292 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:20:39,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 18:20:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:39,398 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-08 18:20:39,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:20:39,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:20:39,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:20:39,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:20:39,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 18:20:39,476 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:20:39,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 18:20:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:20:39,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:20:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:20:39,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335642019] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 18:20:39,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 18:20:39,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 12 [2024-11-08 18:20:39,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562851276] [2024-11-08 18:20:39,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:20:39,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 18:20:39,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:39,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 18:20:39,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-11-08 18:20:40,228 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 102 [2024-11-08 18:20:40,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 142 transitions, 946 flow. Second operand has 6 states, 6 states have (on average 63.166666666666664) internal successors, (379), 6 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:40,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:20:40,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 102 [2024-11-08 18:20:40,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:20:41,627 INFO L124 PetriNetUnfolderBase]: 5229/10554 cut-off events. [2024-11-08 18:20:41,627 INFO L125 PetriNetUnfolderBase]: For 10565/10753 co-relation queries the response was YES. [2024-11-08 18:20:41,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23256 conditions, 10554 events. 5229/10554 cut-off events. For 10565/10753 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 87032 event pairs, 1775 based on Foata normal form. 0/8529 useless extension candidates. Maximal degree in co-relation 18311. Up to 3974 conditions per place. [2024-11-08 18:20:41,714 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 104 selfloop transitions, 34 changer transitions 0/194 dead transitions. [2024-11-08 18:20:41,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 194 transitions, 1437 flow [2024-11-08 18:20:41,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 18:20:41,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 18:20:41,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 581 transitions. [2024-11-08 18:20:41,717 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7120098039215687 [2024-11-08 18:20:41,717 INFO L175 Difference]: Start difference. First operand has 137 places, 142 transitions, 946 flow. Second operand 8 states and 581 transitions. [2024-11-08 18:20:41,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 194 transitions, 1437 flow [2024-11-08 18:20:41,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 194 transitions, 1405 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:20:41,754 INFO L231 Difference]: Finished difference. Result has 142 places, 142 transitions, 1002 flow [2024-11-08 18:20:41,754 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1002, PETRI_PLACES=142, PETRI_TRANSITIONS=142} [2024-11-08 18:20:41,755 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 49 predicate places. [2024-11-08 18:20:41,755 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 142 transitions, 1002 flow [2024-11-08 18:20:41,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 63.166666666666664) internal successors, (379), 6 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:41,755 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:20:41,755 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:20:41,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 18:20:41,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-08 18:20:41,956 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:20:41,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:41,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1074545043, now seen corresponding path program 1 times [2024-11-08 18:20:41,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:41,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540417341] [2024-11-08 18:20:41,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:41,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:20:42,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:20:42,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540417341] [2024-11-08 18:20:42,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540417341] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:20:42,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:20:42,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:20:42,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681286452] [2024-11-08 18:20:42,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:20:42,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:20:42,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:42,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:20:42,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:20:42,118 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 102 [2024-11-08 18:20:42,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 142 transitions, 1002 flow. Second operand has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:42,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:20:42,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 102 [2024-11-08 18:20:42,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:20:43,336 INFO L124 PetriNetUnfolderBase]: 5167/10519 cut-off events. [2024-11-08 18:20:43,336 INFO L125 PetriNetUnfolderBase]: For 13028/13184 co-relation queries the response was YES. [2024-11-08 18:20:43,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24359 conditions, 10519 events. 5167/10519 cut-off events. For 13028/13184 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 86602 event pairs, 3740 based on Foata normal form. 0/9332 useless extension candidates. Maximal degree in co-relation 19507. Up to 6965 conditions per place. [2024-11-08 18:20:43,400 INFO L140 encePairwiseOnDemand]: 96/102 looper letters, 67 selfloop transitions, 17 changer transitions 0/138 dead transitions. [2024-11-08 18:20:43,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 138 transitions, 1162 flow [2024-11-08 18:20:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:20:43,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:20:43,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 265 transitions. [2024-11-08 18:20:43,402 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6495098039215687 [2024-11-08 18:20:43,402 INFO L175 Difference]: Start difference. First operand has 142 places, 142 transitions, 1002 flow. Second operand 4 states and 265 transitions. [2024-11-08 18:20:43,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 138 transitions, 1162 flow [2024-11-08 18:20:43,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 138 transitions, 1104 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-08 18:20:43,418 INFO L231 Difference]: Finished difference. Result has 135 places, 138 transitions, 970 flow [2024-11-08 18:20:43,419 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=970, PETRI_PLACES=135, PETRI_TRANSITIONS=138} [2024-11-08 18:20:43,419 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 42 predicate places. [2024-11-08 18:20:43,419 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 138 transitions, 970 flow [2024-11-08 18:20:43,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:43,420 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:20:43,420 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:20:43,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-08 18:20:43,420 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:20:43,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:43,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1074545042, now seen corresponding path program 1 times [2024-11-08 18:20:43,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:43,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117936378] [2024-11-08 18:20:43,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:43,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:20:43,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:20:43,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117936378] [2024-11-08 18:20:43,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117936378] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:20:43,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998584157] [2024-11-08 18:20:43,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:43,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:20:43,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:20:43,679 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:20:43,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 18:20:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:43,790 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 18:20:43,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:20:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:20:43,896 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:20:43,963 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 22 treesize of output 18 [2024-11-08 18:20:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:20:43,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998584157] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:20:43,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:20:43,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-08 18:20:43,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036553282] [2024-11-08 18:20:43,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:20:43,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 18:20:43,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:43,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 18:20:43,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-08 18:20:44,815 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 102 [2024-11-08 18:20:44,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 138 transitions, 970 flow. Second operand has 12 states, 12 states have (on average 64.08333333333333) internal successors, (769), 12 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:44,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:20:44,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 102 [2024-11-08 18:20:44,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:20:46,254 INFO L124 PetriNetUnfolderBase]: 6460/11765 cut-off events. [2024-11-08 18:20:46,254 INFO L125 PetriNetUnfolderBase]: For 12855/13039 co-relation queries the response was YES. [2024-11-08 18:20:46,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27805 conditions, 11765 events. 6460/11765 cut-off events. For 12855/13039 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 89026 event pairs, 2012 based on Foata normal form. 0/10462 useless extension candidates. Maximal degree in co-relation 22043. Up to 2957 conditions per place. [2024-11-08 18:20:46,324 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 121 selfloop transitions, 35 changer transitions 0/209 dead transitions. [2024-11-08 18:20:46,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 209 transitions, 1576 flow [2024-11-08 18:20:46,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 18:20:46,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 18:20:46,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 542 transitions. [2024-11-08 18:20:46,326 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7591036414565826 [2024-11-08 18:20:46,327 INFO L175 Difference]: Start difference. First operand has 135 places, 138 transitions, 970 flow. Second operand 7 states and 542 transitions. [2024-11-08 18:20:46,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 209 transitions, 1576 flow [2024-11-08 18:20:46,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 209 transitions, 1558 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:20:46,362 INFO L231 Difference]: Finished difference. Result has 140 places, 139 transitions, 1047 flow [2024-11-08 18:20:46,362 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1047, PETRI_PLACES=140, PETRI_TRANSITIONS=139} [2024-11-08 18:20:46,363 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 47 predicate places. [2024-11-08 18:20:46,363 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 139 transitions, 1047 flow [2024-11-08 18:20:46,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 64.08333333333333) internal successors, (769), 12 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:46,364 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:20:46,364 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:20:46,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 18:20:46,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 18:20:46,568 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:20:46,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:46,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1596933991, now seen corresponding path program 1 times [2024-11-08 18:20:46,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:46,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366427859] [2024-11-08 18:20:46,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:46,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:20:47,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:20:47,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366427859] [2024-11-08 18:20:47,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366427859] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:20:47,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357002200] [2024-11-08 18:20:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:47,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:20:47,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:20:47,003 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:20:47,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 18:20:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:47,111 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-08 18:20:47,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:20:47,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:20:47,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:20:47,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 18:20:47,176 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:20:47,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 18:20:47,201 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 18:20:47,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-08 18:20:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:20:47,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:20:47,551 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 46 treesize of output 42 [2024-11-08 18:20:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:20:47,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357002200] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:20:47,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:20:47,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 14 [2024-11-08 18:20:47,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824024281] [2024-11-08 18:20:47,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:20:47,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 18:20:47,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:47,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 18:20:47,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-11-08 18:20:49,782 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 102 [2024-11-08 18:20:49,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 139 transitions, 1047 flow. Second operand has 16 states, 16 states have (on average 55.375) internal successors, (886), 16 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:49,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:20:49,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 102 [2024-11-08 18:20:49,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:20:53,373 INFO L124 PetriNetUnfolderBase]: 15104/26281 cut-off events. [2024-11-08 18:20:53,373 INFO L125 PetriNetUnfolderBase]: For 33183/34192 co-relation queries the response was YES. [2024-11-08 18:20:53,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62381 conditions, 26281 events. 15104/26281 cut-off events. For 33183/34192 co-relation queries the response was YES. Maximal size of possible extension queue 860. Compared 215583 event pairs, 4713 based on Foata normal form. 0/23479 useless extension candidates. Maximal degree in co-relation 56877. Up to 6412 conditions per place. [2024-11-08 18:20:53,579 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 141 selfloop transitions, 36 changer transitions 0/226 dead transitions. [2024-11-08 18:20:53,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 226 transitions, 1786 flow [2024-11-08 18:20:53,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 18:20:53,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 18:20:53,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 659 transitions. [2024-11-08 18:20:53,582 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6460784313725491 [2024-11-08 18:20:53,582 INFO L175 Difference]: Start difference. First operand has 140 places, 139 transitions, 1047 flow. Second operand 10 states and 659 transitions. [2024-11-08 18:20:53,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 226 transitions, 1786 flow [2024-11-08 18:20:53,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 226 transitions, 1708 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-08 18:20:53,635 INFO L231 Difference]: Finished difference. Result has 147 places, 142 transitions, 1092 flow [2024-11-08 18:20:53,636 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1092, PETRI_PLACES=147, PETRI_TRANSITIONS=142} [2024-11-08 18:20:53,636 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 54 predicate places. [2024-11-08 18:20:53,636 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 142 transitions, 1092 flow [2024-11-08 18:20:53,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 55.375) internal successors, (886), 16 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:53,637 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:20:53,637 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:20:53,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 18:20:53,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:20:53,838 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:20:53,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:53,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1188997447, now seen corresponding path program 1 times [2024-11-08 18:20:53,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:53,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784423233] [2024-11-08 18:20:53,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:53,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:20:53,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:20:53,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784423233] [2024-11-08 18:20:53,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784423233] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:20:53,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516177486] [2024-11-08 18:20:53,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:53,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:20:53,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:20:53,976 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:20:53,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 18:20:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:54,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 18:20:54,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:20:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:20:54,202 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:20:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:20:54,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516177486] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:20:54,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:20:54,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-08 18:20:54,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405178779] [2024-11-08 18:20:54,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:20:54,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 18:20:54,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:54,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 18:20:54,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-08 18:20:54,808 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 102 [2024-11-08 18:20:54,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 142 transitions, 1092 flow. Second operand has 16 states, 16 states have (on average 57.0625) internal successors, (913), 16 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:20:54,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:20:54,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 102 [2024-11-08 18:20:54,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:21:02,618 INFO L124 PetriNetUnfolderBase]: 30653/55263 cut-off events. [2024-11-08 18:21:02,618 INFO L125 PetriNetUnfolderBase]: For 76022/79138 co-relation queries the response was YES. [2024-11-08 18:21:02,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135223 conditions, 55263 events. 30653/55263 cut-off events. For 76022/79138 co-relation queries the response was YES. Maximal size of possible extension queue 1911. Compared 526431 event pairs, 11929 based on Foata normal form. 744/52567 useless extension candidates. Maximal degree in co-relation 73015. Up to 12899 conditions per place. [2024-11-08 18:21:03,358 INFO L140 encePairwiseOnDemand]: 84/102 looper letters, 337 selfloop transitions, 85 changer transitions 0/454 dead transitions. [2024-11-08 18:21:03,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 454 transitions, 3712 flow [2024-11-08 18:21:03,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-08 18:21:03,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-08 18:21:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1916 transitions. [2024-11-08 18:21:03,363 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6261437908496732 [2024-11-08 18:21:03,363 INFO L175 Difference]: Start difference. First operand has 147 places, 142 transitions, 1092 flow. Second operand 30 states and 1916 transitions. [2024-11-08 18:21:03,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 454 transitions, 3712 flow [2024-11-08 18:21:03,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 454 transitions, 3588 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-11-08 18:21:03,562 INFO L231 Difference]: Finished difference. Result has 185 places, 195 transitions, 1863 flow [2024-11-08 18:21:03,562 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1863, PETRI_PLACES=185, PETRI_TRANSITIONS=195} [2024-11-08 18:21:03,565 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 92 predicate places. [2024-11-08 18:21:03,565 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 195 transitions, 1863 flow [2024-11-08 18:21:03,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.0625) internal successors, (913), 16 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:21:03,565 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:21:03,566 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:21:03,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 18:21:03,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:03,770 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:21:03,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:03,770 INFO L85 PathProgramCache]: Analyzing trace with hash 2034654710, now seen corresponding path program 1 times [2024-11-08 18:21:03,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:03,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138094703] [2024-11-08 18:21:03,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:03,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:21:03,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:03,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138094703] [2024-11-08 18:21:03,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138094703] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:21:03,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507725387] [2024-11-08 18:21:03,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:03,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:03,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:21:03,959 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:21:03,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 18:21:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:04,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 18:21:04,071 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:21:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:21:04,182 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:21:04,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-08 18:21:04,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:21:04,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507725387] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:21:04,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:21:04,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-08 18:21:04,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816432277] [2024-11-08 18:21:04,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:21:04,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 18:21:04,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:04,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 18:21:04,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-08 18:21:04,793 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 102 [2024-11-08 18:21:04,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 195 transitions, 1863 flow. Second operand has 11 states, 11 states have (on average 64.54545454545455) internal successors, (710), 11 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:21:04,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:21:04,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 102 [2024-11-08 18:21:04,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:21:12,417 INFO L124 PetriNetUnfolderBase]: 29399/51544 cut-off events. [2024-11-08 18:21:12,417 INFO L125 PetriNetUnfolderBase]: For 93068/97112 co-relation queries the response was YES. [2024-11-08 18:21:12,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131240 conditions, 51544 events. 29399/51544 cut-off events. For 93068/97112 co-relation queries the response was YES. Maximal size of possible extension queue 1869. Compared 477528 event pairs, 9103 based on Foata normal form. 0/48335 useless extension candidates. Maximal degree in co-relation 116643. Up to 12935 conditions per place. [2024-11-08 18:21:13,044 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 165 selfloop transitions, 48 changer transitions 0/286 dead transitions. [2024-11-08 18:21:13,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 286 transitions, 2923 flow [2024-11-08 18:21:13,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 18:21:13,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 18:21:13,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 538 transitions. [2024-11-08 18:21:13,046 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7535014005602241 [2024-11-08 18:21:13,046 INFO L175 Difference]: Start difference. First operand has 185 places, 195 transitions, 1863 flow. Second operand 7 states and 538 transitions. [2024-11-08 18:21:13,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 286 transitions, 2923 flow [2024-11-08 18:21:13,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 286 transitions, 2870 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-11-08 18:21:13,223 INFO L231 Difference]: Finished difference. Result has 189 places, 195 transitions, 1926 flow [2024-11-08 18:21:13,224 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1926, PETRI_PLACES=189, PETRI_TRANSITIONS=195} [2024-11-08 18:21:13,224 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 96 predicate places. [2024-11-08 18:21:13,224 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 195 transitions, 1926 flow [2024-11-08 18:21:13,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 64.54545454545455) internal successors, (710), 11 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:21:13,225 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:21:13,225 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:21:13,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 18:21:13,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:13,426 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:21:13,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:13,426 INFO L85 PathProgramCache]: Analyzing trace with hash 193465572, now seen corresponding path program 1 times [2024-11-08 18:21:13,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:13,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325068588] [2024-11-08 18:21:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:13,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:13,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:21:13,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:13,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325068588] [2024-11-08 18:21:13,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325068588] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:21:13,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511205194] [2024-11-08 18:21:13,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:13,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:13,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:21:13,536 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:21:13,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 18:21:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:13,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 18:21:13,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:21:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:21:13,745 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:21:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:21:13,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511205194] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:21:13,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:21:13,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-08 18:21:13,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16145606] [2024-11-08 18:21:13,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:21:13,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 18:21:13,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:13,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 18:21:13,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-08 18:21:14,470 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 102 [2024-11-08 18:21:14,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 195 transitions, 1926 flow. Second operand has 16 states, 16 states have (on average 57.1875) internal successors, (915), 16 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:21:14,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:21:14,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 102 [2024-11-08 18:21:14,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:21:27,281 INFO L124 PetriNetUnfolderBase]: 46054/81509 cut-off events. [2024-11-08 18:21:27,281 INFO L125 PetriNetUnfolderBase]: For 164033/170052 co-relation queries the response was YES. [2024-11-08 18:21:27,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215656 conditions, 81509 events. 46054/81509 cut-off events. For 164033/170052 co-relation queries the response was YES. Maximal size of possible extension queue 2893. Compared 804687 event pairs, 16639 based on Foata normal form. 1201/78409 useless extension candidates. Maximal degree in co-relation 195941. Up to 21636 conditions per place. [2024-11-08 18:21:28,465 INFO L140 encePairwiseOnDemand]: 85/102 looper letters, 333 selfloop transitions, 137 changer transitions 0/502 dead transitions. [2024-11-08 18:21:28,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 502 transitions, 4950 flow [2024-11-08 18:21:28,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-08 18:21:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-08 18:21:28,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2198 transitions. [2024-11-08 18:21:28,471 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.615686274509804 [2024-11-08 18:21:28,471 INFO L175 Difference]: Start difference. First operand has 189 places, 195 transitions, 1926 flow. Second operand 35 states and 2198 transitions. [2024-11-08 18:21:28,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 502 transitions, 4950 flow [2024-11-08 18:21:28,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 502 transitions, 4767 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-08 18:21:28,936 INFO L231 Difference]: Finished difference. Result has 227 places, 239 transitions, 2731 flow [2024-11-08 18:21:28,937 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1825, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2731, PETRI_PLACES=227, PETRI_TRANSITIONS=239} [2024-11-08 18:21:28,937 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 134 predicate places. [2024-11-08 18:21:28,937 INFO L471 AbstractCegarLoop]: Abstraction has has 227 places, 239 transitions, 2731 flow [2024-11-08 18:21:28,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.1875) internal successors, (915), 16 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:21:28,938 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:21:28,938 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:21:28,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 18:21:29,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:29,140 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 18:21:29,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:29,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1812394644, now seen corresponding path program 1 times [2024-11-08 18:21:29,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:29,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453882686] [2024-11-08 18:21:29,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:29,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:21:29,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:29,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453882686] [2024-11-08 18:21:29,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453882686] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:21:29,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805489425] [2024-11-08 18:21:29,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:29,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:29,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:21:29,297 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:21:29,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08b0cd38-a104-4e46-a989-b9865791df5a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 18:21:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:29,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 18:21:29,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:21:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:21:29,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:21:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:21:29,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805489425] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:21:29,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:21:29,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-08 18:21:29,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372882144] [2024-11-08 18:21:29,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:21:29,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 18:21:29,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:29,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 18:21:29,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-08 18:21:30,227 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 102 [2024-11-08 18:21:30,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 239 transitions, 2731 flow. Second operand has 16 states, 16 states have (on average 57.5625) internal successors, (921), 16 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:21:30,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:21:30,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 102 [2024-11-08 18:21:30,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand