./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/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_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/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_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/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 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 17:33:44,741 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 17:33:44,851 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 17:33:44,857 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 17:33:44,858 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 17:33:44,904 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 17:33:44,906 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 17:33:44,907 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 17:33:44,908 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 17:33:44,910 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 17:33:44,910 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 17:33:44,911 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 17:33:44,913 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 17:33:44,916 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 17:33:44,917 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 17:33:44,917 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 17:33:44,918 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 17:33:44,918 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 17:33:44,918 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 17:33:44,919 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 17:33:44,919 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 17:33:44,920 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 17:33:44,925 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 17:33:44,925 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 17:33:44,925 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 17:33:44,926 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 17:33:44,926 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 17:33:44,926 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 17:33:44,927 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 17:33:44,927 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 17:33:44,928 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 17:33:44,928 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 17:33:44,928 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 17:33:44,929 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:33:44,929 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 17:33:44,929 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 17:33:44,930 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 17:33:44,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 17:33:44,930 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 17:33:44,934 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 17:33:44,934 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 17:33:44,935 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 17:33:44,935 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_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 [2024-11-08 17:33:45,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 17:33:45,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 17:33:45,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 17:33:45,316 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 17:33:45,316 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 17:33:45,318 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c Unable to find full path for "g++" [2024-11-08 17:33:47,910 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 17:33:48,239 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 17:33:48,240 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2024-11-08 17:33:48,252 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/data/f13c3da0e/ea27836e5a224c6b9839c63a3a17b663/FLAGd768ed6ab [2024-11-08 17:33:48,270 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/data/f13c3da0e/ea27836e5a224c6b9839c63a3a17b663 [2024-11-08 17:33:48,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 17:33:48,275 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 17:33:48,277 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 17:33:48,278 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 17:33:48,289 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 17:33:48,290 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:33:48" (1/1) ... [2024-11-08 17:33:48,295 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a22c162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:48, skipping insertion in model container [2024-11-08 17:33:48,295 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:33:48" (1/1) ... [2024-11-08 17:33:48,329 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 17:33:48,578 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 17:33:48,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:33:48,596 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 17:33:48,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:33:48,680 INFO L204 MainTranslator]: Completed translation [2024-11-08 17:33:48,681 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:48 WrapperNode [2024-11-08 17:33:48,681 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 17:33:48,683 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 17:33:48,683 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 17:33:48,683 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 17:33:48,697 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:48" (1/1) ... [2024-11-08 17:33:48,712 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:48" (1/1) ... [2024-11-08 17:33:48,754 INFO L138 Inliner]: procedures = 25, calls = 36, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 270 [2024-11-08 17:33:48,755 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 17:33:48,756 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 17:33:48,756 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 17:33:48,756 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 17:33:48,768 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:48" (1/1) ... [2024-11-08 17:33:48,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:48" (1/1) ... [2024-11-08 17:33:48,774 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:48" (1/1) ... [2024-11-08 17:33:48,799 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 17:33:48,799 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:48" (1/1) ... [2024-11-08 17:33:48,800 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:48" (1/1) ... [2024-11-08 17:33:48,813 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:48" (1/1) ... [2024-11-08 17:33:48,820 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:48" (1/1) ... [2024-11-08 17:33:48,822 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:48" (1/1) ... [2024-11-08 17:33:48,825 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:48" (1/1) ... [2024-11-08 17:33:48,830 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 17:33:48,831 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 17:33:48,831 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 17:33:48,832 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 17:33:48,833 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:48" (1/1) ... [2024-11-08 17:33:48,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:33:48,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:33:48,879 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 17:33:48,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 17:33:48,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 17:33:48,931 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 17:33:48,931 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 17:33:48,931 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 17:33:48,932 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 17:33:48,932 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-08 17:33:48,932 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-08 17:33:48,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 17:33:48,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 17:33:48,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 17:33:48,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 17:33:48,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 17:33:48,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 17:33:48,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 17:33:48,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 17:33:48,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 17:33:48,936 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 17:33:49,091 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 17:33:49,094 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 17:33:49,965 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 17:33:49,965 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 17:33:50,476 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 17:33:50,476 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 17:33:50,477 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:33:50 BoogieIcfgContainer [2024-11-08 17:33:50,477 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 17:33:50,479 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 17:33:50,480 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 17:33:50,484 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 17:33:50,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 05:33:48" (1/3) ... [2024-11-08 17:33:50,486 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d62b90d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:33:50, skipping insertion in model container [2024-11-08 17:33:50,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:48" (2/3) ... [2024-11-08 17:33:50,486 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d62b90d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:33:50, skipping insertion in model container [2024-11-08 17:33:50,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:33:50" (3/3) ... [2024-11-08 17:33:50,488 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2024-11-08 17:33:50,514 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 17:33:50,515 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-11-08 17:33:50,515 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 17:33:50,689 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-08 17:33:50,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 102 transitions, 225 flow [2024-11-08 17:33:50,834 INFO L124 PetriNetUnfolderBase]: 15/99 cut-off events. [2024-11-08 17:33:50,835 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-08 17:33:50,844 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 293 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 17:33:50,844 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 102 transitions, 225 flow [2024-11-08 17:33:50,853 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 98 transitions, 214 flow [2024-11-08 17:33:50,870 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 17:33:50,881 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;@3e1528c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 17:33:50,886 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-11-08 17:33:50,895 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 17:33:50,895 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-11-08 17:33:50,896 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 17:33:50,896 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:50,897 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 17:33:50,898 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 17:33:50,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:50,907 INFO L85 PathProgramCache]: Analyzing trace with hash 27310617, now seen corresponding path program 1 times [2024-11-08 17:33:50,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:50,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560244130] [2024-11-08 17:33:50,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:50,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:33:51,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:51,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560244130] [2024-11-08 17:33:51,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560244130] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:33:51,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:33:51,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 17:33:51,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139404038] [2024-11-08 17:33:51,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:33:51,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:33:51,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:51,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:33:51,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:33:51,606 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 102 [2024-11-08 17:33:51,610 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 17:33:51,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:51,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 102 [2024-11-08 17:33:51,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:33:52,261 INFO L124 PetriNetUnfolderBase]: 902/1807 cut-off events. [2024-11-08 17:33:52,262 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2024-11-08 17:33:52,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3055 conditions, 1807 events. 902/1807 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11486 event pairs, 506 based on Foata normal form. 1/1190 useless extension candidates. Maximal degree in co-relation 2798. Up to 1156 conditions per place. [2024-11-08 17:33:52,302 INFO L140 encePairwiseOnDemand]: 96/102 looper letters, 33 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2024-11-08 17:33:52,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 93 transitions, 274 flow [2024-11-08 17:33:52,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:33:52,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:33:52,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2024-11-08 17:33:52,324 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7352941176470589 [2024-11-08 17:33:52,328 INFO L175 Difference]: Start difference. First operand has 93 places, 98 transitions, 214 flow. Second operand 3 states and 225 transitions. [2024-11-08 17:33:52,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 93 transitions, 274 flow [2024-11-08 17:33:52,341 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 17:33:52,348 INFO L231 Difference]: Finished difference. Result has 84 places, 93 transitions, 196 flow [2024-11-08 17:33:52,353 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 17:33:52,360 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -9 predicate places. [2024-11-08 17:33:52,361 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 93 transitions, 196 flow [2024-11-08 17:33:52,361 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 17:33:52,361 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:52,362 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 17:33:52,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 17:33:52,362 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 17:33:52,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:52,363 INFO L85 PathProgramCache]: Analyzing trace with hash 27310618, now seen corresponding path program 1 times [2024-11-08 17:33:52,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:52,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133771090] [2024-11-08 17:33:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:52,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:33:52,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:52,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133771090] [2024-11-08 17:33:52,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133771090] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:33:52,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:33:52,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:33:52,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629275955] [2024-11-08 17:33:52,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:33:52,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:33:52,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:52,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:33:52,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:33:53,252 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 102 [2024-11-08 17:33:53,253 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 17:33:53,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:53,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 102 [2024-11-08 17:33:53,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:33:53,863 INFO L124 PetriNetUnfolderBase]: 904/1814 cut-off events. [2024-11-08 17:33:53,863 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-08 17:33:53,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3028 conditions, 1814 events. 904/1814 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11463 event pairs, 506 based on Foata normal form. 0/1188 useless extension candidates. Maximal degree in co-relation 2965. Up to 1179 conditions per place. [2024-11-08 17:33:53,892 INFO L140 encePairwiseOnDemand]: 97/102 looper letters, 49 selfloop transitions, 5 changer transitions 0/100 dead transitions. [2024-11-08 17:33:53,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 100 transitions, 318 flow [2024-11-08 17:33:53,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:33:53,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:33:53,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 267 transitions. [2024-11-08 17:33:53,896 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6544117647058824 [2024-11-08 17:33:53,900 INFO L175 Difference]: Start difference. First operand has 84 places, 93 transitions, 196 flow. Second operand 4 states and 267 transitions. [2024-11-08 17:33:53,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 100 transitions, 318 flow [2024-11-08 17:33:53,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 100 transitions, 314 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:33:53,907 INFO L231 Difference]: Finished difference. Result has 87 places, 97 transitions, 224 flow [2024-11-08 17:33:53,908 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=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=224, PETRI_PLACES=87, PETRI_TRANSITIONS=97} [2024-11-08 17:33:53,909 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -6 predicate places. [2024-11-08 17:33:53,909 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 97 transitions, 224 flow [2024-11-08 17:33:53,910 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 17:33:53,910 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:53,910 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 17:33:53,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 17:33:53,911 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 17:33:53,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:53,912 INFO L85 PathProgramCache]: Analyzing trace with hash 474852936, now seen corresponding path program 1 times [2024-11-08 17:33:53,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:53,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323315332] [2024-11-08 17:33:53,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:53,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:33:54,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:54,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323315332] [2024-11-08 17:33:54,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323315332] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:33:54,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:33:54,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:33:54,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125608679] [2024-11-08 17:33:54,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:33:54,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 17:33:54,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:54,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 17:33:54,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-08 17:33:54,753 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 102 [2024-11-08 17:33:54,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 97 transitions, 224 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 17:33:54,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:54,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 102 [2024-11-08 17:33:54,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:33:55,385 INFO L124 PetriNetUnfolderBase]: 906/1821 cut-off events. [2024-11-08 17:33:55,385 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-08 17:33:55,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3055 conditions, 1821 events. 906/1821 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11554 event pairs, 506 based on Foata normal form. 0/1195 useless extension candidates. Maximal degree in co-relation 3016. Up to 1178 conditions per place. [2024-11-08 17:33:55,407 INFO L140 encePairwiseOnDemand]: 94/102 looper letters, 52 selfloop transitions, 9 changer transitions 0/107 dead transitions. [2024-11-08 17:33:55,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 107 transitions, 366 flow [2024-11-08 17:33:55,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:33:55,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:33:55,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 327 transitions. [2024-11-08 17:33:55,415 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6411764705882353 [2024-11-08 17:33:55,415 INFO L175 Difference]: Start difference. First operand has 87 places, 97 transitions, 224 flow. Second operand 5 states and 327 transitions. [2024-11-08 17:33:55,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 107 transitions, 366 flow [2024-11-08 17:33:55,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 107 transitions, 366 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 17:33:55,423 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 270 flow [2024-11-08 17:33:55,424 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=93, PETRI_TRANSITIONS=101} [2024-11-08 17:33:55,424 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 0 predicate places. [2024-11-08 17:33:55,426 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 270 flow [2024-11-08 17:33:55,427 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 17:33:55,427 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:55,427 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-08 17:33:55,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 17:33:55,428 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:33:55,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:55,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1862717686, now seen corresponding path program 1 times [2024-11-08 17:33:55,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:55,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447258646] [2024-11-08 17:33:55,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:55,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:33:55,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:55,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447258646] [2024-11-08 17:33:55,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447258646] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:33:55,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732847878] [2024-11-08 17:33:55,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:55,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:33:55,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:33:55,922 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:33:55,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 17:33:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:56,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 17:33:56,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:33:56,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 17:33:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:33:56,430 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:33:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:33:56,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732847878] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:33:56,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:33:56,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-08 17:33:56,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172303889] [2024-11-08 17:33:56,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:33:56,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 17:33:56,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:56,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 17:33:56,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:33:57,764 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 102 [2024-11-08 17:33:57,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 101 transitions, 270 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:33:57,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:57,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 102 [2024-11-08 17:33:57,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:33:58,523 INFO L124 PetriNetUnfolderBase]: 905/1819 cut-off events. [2024-11-08 17:33:58,523 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-08 17:33:58,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3073 conditions, 1819 events. 905/1819 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11501 event pairs, 506 based on Foata normal form. 0/1197 useless extension candidates. Maximal degree in co-relation 3029. Up to 1173 conditions per place. [2024-11-08 17:33:58,552 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 40 selfloop transitions, 16 changer transitions 0/102 dead transitions. [2024-11-08 17:33:58,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 102 transitions, 382 flow [2024-11-08 17:33:58,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 17:33:58,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 17:33:58,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 425 transitions. [2024-11-08 17:33:58,557 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-11-08 17:33:58,557 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 270 flow. Second operand 7 states and 425 transitions. [2024-11-08 17:33:58,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 102 transitions, 382 flow [2024-11-08 17:33:58,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 102 transitions, 375 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-08 17:33:58,565 INFO L231 Difference]: Finished difference. Result has 97 places, 100 transitions, 295 flow [2024-11-08 17:33:58,565 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=295, PETRI_PLACES=97, PETRI_TRANSITIONS=100} [2024-11-08 17:33:58,566 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 4 predicate places. [2024-11-08 17:33:58,568 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 100 transitions, 295 flow [2024-11-08 17:33:58,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:33:58,569 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:58,569 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:33:58,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 17:33:58,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:33:58,771 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:33:58,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:58,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1068234024, now seen corresponding path program 1 times [2024-11-08 17:33:58,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:58,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476208690] [2024-11-08 17:33:58,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:58,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:33:59,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:59,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476208690] [2024-11-08 17:33:59,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476208690] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:33:59,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:33:59,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:33:59,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510057794] [2024-11-08 17:33:59,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:33:59,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 17:33:59,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:59,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 17:33:59,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-08 17:33:59,567 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 102 [2024-11-08 17:33:59,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 100 transitions, 295 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 17:33:59,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:59,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 102 [2024-11-08 17:33:59,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:00,140 INFO L124 PetriNetUnfolderBase]: 907/1826 cut-off events. [2024-11-08 17:34:00,141 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-11-08 17:34:00,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3107 conditions, 1826 events. 907/1826 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11577 event pairs, 506 based on Foata normal form. 0/1209 useless extension candidates. Maximal degree in co-relation 3079. Up to 1183 conditions per place. [2024-11-08 17:34:00,167 INFO L140 encePairwiseOnDemand]: 93/102 looper letters, 51 selfloop transitions, 12 changer transitions 0/109 dead transitions. [2024-11-08 17:34:00,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 109 transitions, 447 flow [2024-11-08 17:34:00,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:34:00,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:34:00,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 325 transitions. [2024-11-08 17:34:00,175 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6372549019607843 [2024-11-08 17:34:00,175 INFO L175 Difference]: Start difference. First operand has 97 places, 100 transitions, 295 flow. Second operand 5 states and 325 transitions. [2024-11-08 17:34:00,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 109 transitions, 447 flow [2024-11-08 17:34:00,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 109 transitions, 403 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-08 17:34:00,182 INFO L231 Difference]: Finished difference. Result has 97 places, 104 transitions, 313 flow [2024-11-08 17:34:00,183 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=313, PETRI_PLACES=97, PETRI_TRANSITIONS=104} [2024-11-08 17:34:00,187 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 4 predicate places. [2024-11-08 17:34:00,188 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 104 transitions, 313 flow [2024-11-08 17:34:00,188 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 17:34:00,188 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:00,188 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-08 17:34:00,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 17:34:00,189 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:34:00,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:00,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1277585566, now seen corresponding path program 1 times [2024-11-08 17:34:00,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:00,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881129490] [2024-11-08 17:34:00,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:00,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:34:00,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:00,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881129490] [2024-11-08 17:34:00,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881129490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:34:00,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932939923] [2024-11-08 17:34:00,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:00,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:34:00,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:34:00,808 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:34:00,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 17:34:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:00,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 17:34:00,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:34:00,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 17:34:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:34:01,192 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:34:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:34:01,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932939923] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:34:01,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:34:01,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-08 17:34:01,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525892814] [2024-11-08 17:34:01,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:34:01,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 17:34:01,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:01,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 17:34:01,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:34:03,575 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 102 [2024-11-08 17:34:03,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 104 transitions, 313 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 17:34:03,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:03,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 102 [2024-11-08 17:34:03,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:04,537 INFO L124 PetriNetUnfolderBase]: 908/1834 cut-off events. [2024-11-08 17:34:04,537 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-08 17:34:04,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3129 conditions, 1834 events. 908/1834 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11591 event pairs, 506 based on Foata normal form. 0/1215 useless extension candidates. Maximal degree in co-relation 3089. Up to 1168 conditions per place. [2024-11-08 17:34:04,561 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 46 selfloop transitions, 25 changer transitions 0/117 dead transitions. [2024-11-08 17:34:04,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 117 transitions, 498 flow [2024-11-08 17:34:04,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 17:34:04,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 17:34:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 601 transitions. [2024-11-08 17:34:04,565 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5892156862745098 [2024-11-08 17:34:04,565 INFO L175 Difference]: Start difference. First operand has 97 places, 104 transitions, 313 flow. Second operand 10 states and 601 transitions. [2024-11-08 17:34:04,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 117 transitions, 498 flow [2024-11-08 17:34:04,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 117 transitions, 497 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 17:34:04,574 INFO L231 Difference]: Finished difference. Result has 106 places, 109 transitions, 401 flow [2024-11-08 17:34:04,574 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=95, 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=401, PETRI_PLACES=106, PETRI_TRANSITIONS=109} [2024-11-08 17:34:04,575 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 13 predicate places. [2024-11-08 17:34:04,575 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 109 transitions, 401 flow [2024-11-08 17:34:04,576 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 17:34:04,576 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:04,577 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:34:04,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 17:34:04,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:34:04,785 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:34:04,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:04,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1946924725, now seen corresponding path program 1 times [2024-11-08 17:34:04,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:04,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801359878] [2024-11-08 17:34:04,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:04,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:04,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:34:05,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:05,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801359878] [2024-11-08 17:34:05,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801359878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:34:05,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644704415] [2024-11-08 17:34:05,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:05,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:34:05,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:34:05,267 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:34:05,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 17:34:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:05,398 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 17:34:05,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:34:05,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 17:34:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:34:05,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:34:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:34:06,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644704415] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:34:06,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:34:06,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-08 17:34:06,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608253696] [2024-11-08 17:34:06,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:34:06,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 17:34:06,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:06,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 17:34:06,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:34:07,565 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 102 [2024-11-08 17:34:07,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 109 transitions, 401 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 17:34:07,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:07,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 102 [2024-11-08 17:34:07,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:08,527 INFO L124 PetriNetUnfolderBase]: 907/1832 cut-off events. [2024-11-08 17:34:08,528 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-11-08 17:34:08,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3158 conditions, 1832 events. 907/1832 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11607 event pairs, 506 based on Foata normal form. 1/1218 useless extension candidates. Maximal degree in co-relation 3115. Up to 1170 conditions per place. [2024-11-08 17:34:08,553 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 42 selfloop transitions, 24 changer transitions 0/112 dead transitions. [2024-11-08 17:34:08,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 112 transitions, 539 flow [2024-11-08 17:34:08,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 17:34:08,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 17:34:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 482 transitions. [2024-11-08 17:34:08,557 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5906862745098039 [2024-11-08 17:34:08,557 INFO L175 Difference]: Start difference. First operand has 106 places, 109 transitions, 401 flow. Second operand 8 states and 482 transitions. [2024-11-08 17:34:08,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 112 transitions, 539 flow [2024-11-08 17:34:08,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 112 transitions, 478 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-08 17:34:08,563 INFO L231 Difference]: Finished difference. Result has 105 places, 108 transitions, 394 flow [2024-11-08 17:34:08,564 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=97, 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=8, PETRI_FLOW=394, PETRI_PLACES=105, PETRI_TRANSITIONS=108} [2024-11-08 17:34:08,567 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 12 predicate places. [2024-11-08 17:34:08,567 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 108 transitions, 394 flow [2024-11-08 17:34:08,568 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 17:34:08,572 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:08,572 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:34:08,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 17:34:08,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:34:08,773 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:34:08,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:08,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1035855905, now seen corresponding path program 1 times [2024-11-08 17:34:08,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:08,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268131822] [2024-11-08 17:34:08,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:08,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:34:08,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:08,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268131822] [2024-11-08 17:34:08,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268131822] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:34:08,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:34:08,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:34:08,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294150996] [2024-11-08 17:34:08,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:34:08,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:34:08,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:08,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:34:08,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:34:09,049 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 102 [2024-11-08 17:34:09,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 108 transitions, 394 flow. Second operand has 5 states, 5 states have (on average 59.2) internal successors, (296), 5 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:09,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:09,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 102 [2024-11-08 17:34:09,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:09,724 INFO L124 PetriNetUnfolderBase]: 1755/3624 cut-off events. [2024-11-08 17:34:09,725 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2024-11-08 17:34:09,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6149 conditions, 3624 events. 1755/3624 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 26540 event pairs, 767 based on Foata normal form. 62/2574 useless extension candidates. Maximal degree in co-relation 6097. Up to 1609 conditions per place. [2024-11-08 17:34:09,819 INFO L140 encePairwiseOnDemand]: 95/102 looper letters, 106 selfloop transitions, 7 changer transitions 0/165 dead transitions. [2024-11-08 17:34:09,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 165 transitions, 808 flow [2024-11-08 17:34:09,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:34:09,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 17:34:09,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 437 transitions. [2024-11-08 17:34:09,822 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7140522875816994 [2024-11-08 17:34:09,822 INFO L175 Difference]: Start difference. First operand has 105 places, 108 transitions, 394 flow. Second operand 6 states and 437 transitions. [2024-11-08 17:34:09,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 165 transitions, 808 flow [2024-11-08 17:34:09,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 165 transitions, 710 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-11-08 17:34:09,830 INFO L231 Difference]: Finished difference. Result has 105 places, 110 transitions, 364 flow [2024-11-08 17:34:09,832 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=364, PETRI_PLACES=105, PETRI_TRANSITIONS=110} [2024-11-08 17:34:09,833 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 12 predicate places. [2024-11-08 17:34:09,835 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 110 transitions, 364 flow [2024-11-08 17:34:09,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.2) internal successors, (296), 5 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:09,838 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:09,838 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:34:09,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 17:34:09,839 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:34:09,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:09,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1546756682, now seen corresponding path program 1 times [2024-11-08 17:34:09,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:09,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076451738] [2024-11-08 17:34:09,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:09,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:34:09,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:09,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076451738] [2024-11-08 17:34:09,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076451738] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:34:09,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:34:09,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:34:09,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526220677] [2024-11-08 17:34:09,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:34:09,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:34:09,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:09,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:34:09,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:34:10,093 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 102 [2024-11-08 17:34:10,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 110 transitions, 364 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 17:34:10,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:10,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 102 [2024-11-08 17:34:10,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:10,809 INFO L124 PetriNetUnfolderBase]: 1549/3214 cut-off events. [2024-11-08 17:34:10,809 INFO L125 PetriNetUnfolderBase]: For 262/262 co-relation queries the response was YES. [2024-11-08 17:34:10,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5607 conditions, 3214 events. 1549/3214 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 23117 event pairs, 798 based on Foata normal form. 41/2305 useless extension candidates. Maximal degree in co-relation 5554. Up to 1712 conditions per place. [2024-11-08 17:34:10,849 INFO L140 encePairwiseOnDemand]: 95/102 looper letters, 99 selfloop transitions, 7 changer transitions 0/158 dead transitions. [2024-11-08 17:34:10,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 158 transitions, 714 flow [2024-11-08 17:34:10,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:34:10,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 17:34:10,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 430 transitions. [2024-11-08 17:34:10,852 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7026143790849673 [2024-11-08 17:34:10,852 INFO L175 Difference]: Start difference. First operand has 105 places, 110 transitions, 364 flow. Second operand 6 states and 430 transitions. [2024-11-08 17:34:10,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 158 transitions, 714 flow [2024-11-08 17:34:10,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 158 transitions, 706 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-08 17:34:10,857 INFO L231 Difference]: Finished difference. Result has 110 places, 111 transitions, 380 flow [2024-11-08 17:34:10,858 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=380, PETRI_PLACES=110, PETRI_TRANSITIONS=111} [2024-11-08 17:34:10,859 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 17 predicate places. [2024-11-08 17:34:10,859 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 111 transitions, 380 flow [2024-11-08 17:34:10,859 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 17:34:10,860 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:10,860 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:34:10,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-08 17:34:10,860 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:34:10,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:10,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1241410884, now seen corresponding path program 1 times [2024-11-08 17:34:10,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:10,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570614864] [2024-11-08 17:34:10,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:10,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:34:10,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:10,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570614864] [2024-11-08 17:34:10,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570614864] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:34:10,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:34:10,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 17:34:10,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392654937] [2024-11-08 17:34:10,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:34:10,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:34:10,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:10,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:34:10,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:34:11,107 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 102 [2024-11-08 17:34:11,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 111 transitions, 380 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 17:34:11,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:11,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 102 [2024-11-08 17:34:11,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:12,085 INFO L124 PetriNetUnfolderBase]: 2247/4932 cut-off events. [2024-11-08 17:34:12,085 INFO L125 PetriNetUnfolderBase]: For 764/764 co-relation queries the response was YES. [2024-11-08 17:34:12,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8801 conditions, 4932 events. 2247/4932 cut-off events. For 764/764 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 39825 event pairs, 995 based on Foata normal form. 62/3534 useless extension candidates. Maximal degree in co-relation 8747. Up to 2005 conditions per place. [2024-11-08 17:34:12,143 INFO L140 encePairwiseOnDemand]: 95/102 looper letters, 98 selfloop transitions, 11 changer transitions 0/161 dead transitions. [2024-11-08 17:34:12,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 161 transitions, 734 flow [2024-11-08 17:34:12,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:34:12,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 17:34:12,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 432 transitions. [2024-11-08 17:34:12,146 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7058823529411765 [2024-11-08 17:34:12,146 INFO L175 Difference]: Start difference. First operand has 110 places, 111 transitions, 380 flow. Second operand 6 states and 432 transitions. [2024-11-08 17:34:12,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 161 transitions, 734 flow [2024-11-08 17:34:12,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 161 transitions, 724 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 17:34:12,153 INFO L231 Difference]: Finished difference. Result has 115 places, 114 transitions, 425 flow [2024-11-08 17:34:12,153 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=425, PETRI_PLACES=115, PETRI_TRANSITIONS=114} [2024-11-08 17:34:12,154 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 22 predicate places. [2024-11-08 17:34:12,154 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 114 transitions, 425 flow [2024-11-08 17:34:12,155 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 17:34:12,155 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:12,155 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:34:12,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 17:34:12,156 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:34:12,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:12,156 INFO L85 PathProgramCache]: Analyzing trace with hash 551967545, now seen corresponding path program 1 times [2024-11-08 17:34:12,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:12,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896508360] [2024-11-08 17:34:12,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:12,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:34:12,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:12,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896508360] [2024-11-08 17:34:12,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896508360] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:34:12,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:34:12,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 17:34:12,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62580293] [2024-11-08 17:34:12,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:34:12,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:34:12,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:12,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:34:12,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:34:12,429 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 102 [2024-11-08 17:34:12,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 114 transitions, 425 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 17:34:12,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:12,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 102 [2024-11-08 17:34:12,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:13,190 INFO L124 PetriNetUnfolderBase]: 1912/4230 cut-off events. [2024-11-08 17:34:13,190 INFO L125 PetriNetUnfolderBase]: For 1432/1432 co-relation queries the response was YES. [2024-11-08 17:34:13,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7914 conditions, 4230 events. 1912/4230 cut-off events. For 1432/1432 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 32969 event pairs, 1068 based on Foata normal form. 58/3126 useless extension candidates. Maximal degree in co-relation 7851. Up to 2047 conditions per place. [2024-11-08 17:34:13,233 INFO L140 encePairwiseOnDemand]: 95/102 looper letters, 92 selfloop transitions, 10 changer transitions 0/154 dead transitions. [2024-11-08 17:34:13,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 154 transitions, 753 flow [2024-11-08 17:34:13,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:34:13,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 17:34:13,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 424 transitions. [2024-11-08 17:34:13,236 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6928104575163399 [2024-11-08 17:34:13,237 INFO L175 Difference]: Start difference. First operand has 115 places, 114 transitions, 425 flow. Second operand 6 states and 424 transitions. [2024-11-08 17:34:13,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 154 transitions, 753 flow [2024-11-08 17:34:13,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 154 transitions, 736 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-08 17:34:13,243 INFO L231 Difference]: Finished difference. Result has 119 places, 115 transitions, 438 flow [2024-11-08 17:34:13,244 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=438, PETRI_PLACES=119, PETRI_TRANSITIONS=115} [2024-11-08 17:34:13,245 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 26 predicate places. [2024-11-08 17:34:13,245 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 115 transitions, 438 flow [2024-11-08 17:34:13,245 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 17:34:13,245 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:13,245 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 17:34:13,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-08 17:34:13,246 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:34:13,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:13,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1516596846, now seen corresponding path program 1 times [2024-11-08 17:34:13,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:13,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740034292] [2024-11-08 17:34:13,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:13,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:34:13,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:13,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740034292] [2024-11-08 17:34:13,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740034292] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:34:13,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:34:13,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 17:34:13,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083512957] [2024-11-08 17:34:13,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:34:13,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:34:13,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:13,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:34:13,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:34:13,521 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 102 [2024-11-08 17:34:13,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 115 transitions, 438 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 17:34:13,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:13,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 102 [2024-11-08 17:34:13,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:14,769 INFO L124 PetriNetUnfolderBase]: 2936/6467 cut-off events. [2024-11-08 17:34:14,770 INFO L125 PetriNetUnfolderBase]: For 2914/2914 co-relation queries the response was YES. [2024-11-08 17:34:14,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12748 conditions, 6467 events. 2936/6467 cut-off events. For 2914/2914 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 54162 event pairs, 1442 based on Foata normal form. 92/4939 useless extension candidates. Maximal degree in co-relation 12650. Up to 2725 conditions per place. [2024-11-08 17:34:14,827 INFO L140 encePairwiseOnDemand]: 95/102 looper letters, 99 selfloop transitions, 11 changer transitions 0/162 dead transitions. [2024-11-08 17:34:14,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 162 transitions, 826 flow [2024-11-08 17:34:14,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:34:14,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 17:34:14,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 426 transitions. [2024-11-08 17:34:14,829 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.696078431372549 [2024-11-08 17:34:14,830 INFO L175 Difference]: Start difference. First operand has 119 places, 115 transitions, 438 flow. Second operand 6 states and 426 transitions. [2024-11-08 17:34:14,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 162 transitions, 826 flow [2024-11-08 17:34:14,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 162 transitions, 810 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 17:34:14,842 INFO L231 Difference]: Finished difference. Result has 124 places, 118 transitions, 477 flow [2024-11-08 17:34:14,843 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=477, PETRI_PLACES=124, PETRI_TRANSITIONS=118} [2024-11-08 17:34:14,845 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 31 predicate places. [2024-11-08 17:34:14,846 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 118 transitions, 477 flow [2024-11-08 17:34:14,847 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 17:34:14,847 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:14,848 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 17:34:14,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-08 17:34:14,848 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:34:14,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:14,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1754762525, now seen corresponding path program 1 times [2024-11-08 17:34:14,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:14,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543876117] [2024-11-08 17:34:14,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:14,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:34:15,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:15,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543876117] [2024-11-08 17:34:15,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543876117] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:34:15,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:34:15,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:34:15,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733353590] [2024-11-08 17:34:15,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:34:15,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:34:15,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:15,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:34:15,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:34:15,247 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 102 [2024-11-08 17:34:15,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 118 transitions, 477 flow. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:15,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:15,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 102 [2024-11-08 17:34:15,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:16,433 INFO L124 PetriNetUnfolderBase]: 3467/7471 cut-off events. [2024-11-08 17:34:16,433 INFO L125 PetriNetUnfolderBase]: For 4388/4388 co-relation queries the response was YES. [2024-11-08 17:34:16,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15094 conditions, 7471 events. 3467/7471 cut-off events. For 4388/4388 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 61754 event pairs, 2430 based on Foata normal form. 0/5826 useless extension candidates. Maximal degree in co-relation 14987. Up to 4788 conditions per place. [2024-11-08 17:34:16,515 INFO L140 encePairwiseOnDemand]: 95/102 looper letters, 51 selfloop transitions, 8 changer transitions 0/114 dead transitions. [2024-11-08 17:34:16,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 114 transitions, 587 flow [2024-11-08 17:34:16,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:34:16,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:34:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 313 transitions. [2024-11-08 17:34:16,518 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6137254901960785 [2024-11-08 17:34:16,518 INFO L175 Difference]: Start difference. First operand has 124 places, 118 transitions, 477 flow. Second operand 5 states and 313 transitions. [2024-11-08 17:34:16,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 114 transitions, 587 flow [2024-11-08 17:34:16,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 114 transitions, 574 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-08 17:34:16,534 INFO L231 Difference]: Finished difference. Result has 122 places, 114 transitions, 472 flow [2024-11-08 17:34:16,535 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=472, PETRI_PLACES=122, PETRI_TRANSITIONS=114} [2024-11-08 17:34:16,535 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 29 predicate places. [2024-11-08 17:34:16,536 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 114 transitions, 472 flow [2024-11-08 17:34:16,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:16,537 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:16,537 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 17:34:16,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-08 17:34:16,538 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:34:16,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:16,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1754762526, now seen corresponding path program 1 times [2024-11-08 17:34:16,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:16,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019489560] [2024-11-08 17:34:16,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:16,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:16,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:17,323 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 17:34:17,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:17,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019489560] [2024-11-08 17:34:17,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019489560] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:34:17,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705541405] [2024-11-08 17:34:17,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:17,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:34:17,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:34:17,327 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:34:17,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 17:34:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:17,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 17:34:17,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:34:17,494 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 17:34:17,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:34:17,605 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 17:34:17,641 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-08 17:34:17,642 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 17:34:17,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:34:17,734 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 17:34:17,746 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 17:34:17,746 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 17:34:17,849 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 17:34:17,850 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:34:18,397 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 17:34:18,806 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 17:34:18,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705541405] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:34:18,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:34:18,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2024-11-08 17:34:18,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994694762] [2024-11-08 17:34:18,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:34:18,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 17:34:18,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:18,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 17:34:18,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-11-08 17:34:22,217 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 102 [2024-11-08 17:34:22,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 114 transitions, 472 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 17:34:22,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:22,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 102 [2024-11-08 17:34:22,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:24,453 INFO L124 PetriNetUnfolderBase]: 6275/12246 cut-off events. [2024-11-08 17:34:24,453 INFO L125 PetriNetUnfolderBase]: For 5572/5572 co-relation queries the response was YES. [2024-11-08 17:34:24,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24645 conditions, 12246 events. 6275/12246 cut-off events. For 5572/5572 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 100089 event pairs, 1997 based on Foata normal form. 0/9561 useless extension candidates. Maximal degree in co-relation 20578. Up to 3374 conditions per place. [2024-11-08 17:34:24,578 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 126 selfloop transitions, 23 changer transitions 0/202 dead transitions. [2024-11-08 17:34:24,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 202 transitions, 1051 flow [2024-11-08 17:34:24,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 17:34:24,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 17:34:24,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 600 transitions. [2024-11-08 17:34:24,582 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6535947712418301 [2024-11-08 17:34:24,582 INFO L175 Difference]: Start difference. First operand has 122 places, 114 transitions, 472 flow. Second operand 9 states and 600 transitions. [2024-11-08 17:34:24,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 202 transitions, 1051 flow [2024-11-08 17:34:24,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 202 transitions, 1035 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 17:34:24,600 INFO L231 Difference]: Finished difference. Result has 128 places, 122 transitions, 564 flow [2024-11-08 17:34:24,600 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=564, PETRI_PLACES=128, PETRI_TRANSITIONS=122} [2024-11-08 17:34:24,601 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 35 predicate places. [2024-11-08 17:34:24,601 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 122 transitions, 564 flow [2024-11-08 17:34:24,602 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 17:34:24,602 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:24,603 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 17:34:24,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 17:34:24,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 17:34:24,804 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:34:24,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:24,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1285368786, now seen corresponding path program 1 times [2024-11-08 17:34:24,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:24,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132574248] [2024-11-08 17:34:24,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:24,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:34:24,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:24,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132574248] [2024-11-08 17:34:24,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132574248] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:34:24,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:34:24,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 17:34:24,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856233878] [2024-11-08 17:34:24,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:34:24,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:34:24,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:24,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:34:24,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:34:25,029 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 102 [2024-11-08 17:34:25,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 122 transitions, 564 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 17:34:25,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:25,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 102 [2024-11-08 17:34:25,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:26,032 INFO L124 PetriNetUnfolderBase]: 4020/8390 cut-off events. [2024-11-08 17:34:26,032 INFO L125 PetriNetUnfolderBase]: For 6488/6506 co-relation queries the response was YES. [2024-11-08 17:34:26,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17851 conditions, 8390 events. 4020/8390 cut-off events. For 6488/6506 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 67562 event pairs, 2414 based on Foata normal form. 94/6752 useless extension candidates. Maximal degree in co-relation 13985. Up to 4230 conditions per place. [2024-11-08 17:34:26,103 INFO L140 encePairwiseOnDemand]: 95/102 looper letters, 97 selfloop transitions, 16 changer transitions 0/161 dead transitions. [2024-11-08 17:34:26,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 161 transitions, 974 flow [2024-11-08 17:34:26,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:34:26,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 17:34:26,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 419 transitions. [2024-11-08 17:34:26,105 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.684640522875817 [2024-11-08 17:34:26,106 INFO L175 Difference]: Start difference. First operand has 128 places, 122 transitions, 564 flow. Second operand 6 states and 419 transitions. [2024-11-08 17:34:26,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 161 transitions, 974 flow [2024-11-08 17:34:26,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 161 transitions, 950 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-08 17:34:26,124 INFO L231 Difference]: Finished difference. Result has 133 places, 124 transitions, 608 flow [2024-11-08 17:34:26,124 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=608, PETRI_PLACES=133, PETRI_TRANSITIONS=124} [2024-11-08 17:34:26,125 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 40 predicate places. [2024-11-08 17:34:26,125 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 124 transitions, 608 flow [2024-11-08 17:34:26,125 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 17:34:26,125 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:26,125 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 17:34:26,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-08 17:34:26,126 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:34:26,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:26,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1436935684, now seen corresponding path program 1 times [2024-11-08 17:34:26,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:26,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166126066] [2024-11-08 17:34:26,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:26,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:34:26,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:26,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166126066] [2024-11-08 17:34:26,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166126066] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:34:26,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:34:26,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:34:26,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113664713] [2024-11-08 17:34:26,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:34:26,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:34:26,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:26,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:34:26,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:34:26,373 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2024-11-08 17:34:26,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 124 transitions, 608 flow. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:26,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:26,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2024-11-08 17:34:26,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:27,751 INFO L124 PetriNetUnfolderBase]: 4675/9145 cut-off events. [2024-11-08 17:34:27,751 INFO L125 PetriNetUnfolderBase]: For 7281/7281 co-relation queries the response was YES. [2024-11-08 17:34:27,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20090 conditions, 9145 events. 4675/9145 cut-off events. For 7281/7281 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 70607 event pairs, 3454 based on Foata normal form. 0/7893 useless extension candidates. Maximal degree in co-relation 16251. Up to 6516 conditions per place. [2024-11-08 17:34:27,848 INFO L140 encePairwiseOnDemand]: 95/102 looper letters, 55 selfloop transitions, 13 changer transitions 0/120 dead transitions. [2024-11-08 17:34:27,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 120 transitions, 736 flow [2024-11-08 17:34:27,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:34:27,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:34:27,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 317 transitions. [2024-11-08 17:34:27,851 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6215686274509804 [2024-11-08 17:34:27,851 INFO L175 Difference]: Start difference. First operand has 133 places, 124 transitions, 608 flow. Second operand 5 states and 317 transitions. [2024-11-08 17:34:27,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 120 transitions, 736 flow [2024-11-08 17:34:27,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 120 transitions, 712 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 17:34:27,869 INFO L231 Difference]: Finished difference. Result has 130 places, 120 transitions, 602 flow [2024-11-08 17:34:27,869 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=602, PETRI_PLACES=130, PETRI_TRANSITIONS=120} [2024-11-08 17:34:27,870 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 37 predicate places. [2024-11-08 17:34:27,870 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 120 transitions, 602 flow [2024-11-08 17:34:27,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:34:27,870 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:27,870 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 17:34:27,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-08 17:34:27,871 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:34:27,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:27,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1436935683, now seen corresponding path program 1 times [2024-11-08 17:34:27,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:27,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98012499] [2024-11-08 17:34:27,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:27,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:28,298 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 17:34:28,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:28,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98012499] [2024-11-08 17:34:28,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98012499] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:34:28,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442757982] [2024-11-08 17:34:28,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:28,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:34:28,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:34:28,302 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:34:28,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 17:34:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:28,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 17:34:28,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:34:28,439 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 17:34:28,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:34:28,534 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 17:34:28,545 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 17:34:28,546 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 17:34:28,661 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 17:34:28,661 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:34:28,890 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 17:34:29,018 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 17:34:29,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442757982] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:34:29,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:34:29,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-08 17:34:29,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016403599] [2024-11-08 17:34:29,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:34:29,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 17:34:29,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:29,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 17:34:29,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:34:33,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:34:37,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:34:41,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:34:45,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:34:49,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:34:53,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:34:57,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:35:01,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:35:05,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:35:09,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:35:14,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:35:18,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:35:22,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:35:26,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:35:30,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:35:34,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:35:38,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:35:42,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:35:42,854 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 102 [2024-11-08 17:35:42,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 120 transitions, 602 flow. Second operand has 14 states, 14 states have (on average 46.142857142857146) internal successors, (646), 14 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:35:42,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:35:42,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 102 [2024-11-08 17:35:42,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:35:44,631 INFO L124 PetriNetUnfolderBase]: 6139/10664 cut-off events. [2024-11-08 17:35:44,631 INFO L125 PetriNetUnfolderBase]: For 8068/8068 co-relation queries the response was YES. [2024-11-08 17:35:44,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24151 conditions, 10664 events. 6139/10664 cut-off events. For 8068/8068 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 76913 event pairs, 2132 based on Foata normal form. 0/8888 useless extension candidates. Maximal degree in co-relation 20381. Up to 3186 conditions per place. [2024-11-08 17:35:44,730 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 142 selfloop transitions, 31 changer transitions 0/213 dead transitions. [2024-11-08 17:35:44,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 213 transitions, 1301 flow [2024-11-08 17:35:44,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 17:35:44,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 17:35:44,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 536 transitions. [2024-11-08 17:35:44,733 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5838779956427015 [2024-11-08 17:35:44,733 INFO L175 Difference]: Start difference. First operand has 130 places, 120 transitions, 602 flow. Second operand 9 states and 536 transitions. [2024-11-08 17:35:44,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 213 transitions, 1301 flow [2024-11-08 17:35:44,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 213 transitions, 1275 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 17:35:44,748 INFO L231 Difference]: Finished difference. Result has 136 places, 128 transitions, 740 flow [2024-11-08 17:35:44,748 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=740, PETRI_PLACES=136, PETRI_TRANSITIONS=128} [2024-11-08 17:35:44,749 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 43 predicate places. [2024-11-08 17:35:44,749 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 128 transitions, 740 flow [2024-11-08 17:35:44,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.142857142857146) internal successors, (646), 14 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:35:44,750 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:35:44,750 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 17:35:44,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 17:35:44,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-08 17:35:44,951 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:35:44,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:35:44,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1823950274, now seen corresponding path program 1 times [2024-11-08 17:35:44,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:35:44,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719501078] [2024-11-08 17:35:44,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:35:44,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:35:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:35:45,356 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 17:35:45,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:35:45,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719501078] [2024-11-08 17:35:45,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719501078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:35:45,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664427965] [2024-11-08 17:35:45,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:35:45,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:35:45,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:35:45,361 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:35:45,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 17:35:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:35:45,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 17:35:45,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:35:45,516 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 17:35:45,622 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-08 17:35:45,622 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 17:35:45,629 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 17:35:45,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:35:45,679 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 17:35:45,693 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 17:35:45,694 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 17:35:45,802 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 17:35:45,802 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:35:46,163 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 162 treesize of output 156 [2024-11-08 17:35:46,463 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 17:35:46,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664427965] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:35:46,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:35:46,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-08 17:35:46,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954445394] [2024-11-08 17:35:46,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:35:46,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 17:35:46,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:35:46,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 17:35:46,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-08 17:35:51,724 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 102 [2024-11-08 17:35:51,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 128 transitions, 740 flow. Second operand has 16 states, 16 states have (on average 54.0625) internal successors, (865), 16 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:35:51,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:35:51,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 102 [2024-11-08 17:35:51,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:35:55,122 INFO L124 PetriNetUnfolderBase]: 9244/17762 cut-off events. [2024-11-08 17:35:55,122 INFO L125 PetriNetUnfolderBase]: For 16473/16644 co-relation queries the response was YES. [2024-11-08 17:35:55,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38563 conditions, 17762 events. 9244/17762 cut-off events. For 16473/16644 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 149577 event pairs, 2294 based on Foata normal form. 0/14364 useless extension candidates. Maximal degree in co-relation 34866. Up to 4962 conditions per place. [2024-11-08 17:35:55,345 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 135 selfloop transitions, 31 changer transitions 0/214 dead transitions. [2024-11-08 17:35:55,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 214 transitions, 1414 flow [2024-11-08 17:35:55,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 17:35:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 17:35:55,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 596 transitions. [2024-11-08 17:35:55,348 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6492374727668845 [2024-11-08 17:35:55,349 INFO L175 Difference]: Start difference. First operand has 136 places, 128 transitions, 740 flow. Second operand 9 states and 596 transitions. [2024-11-08 17:35:55,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 214 transitions, 1414 flow [2024-11-08 17:35:55,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 214 transitions, 1385 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-08 17:35:55,384 INFO L231 Difference]: Finished difference. Result has 142 places, 129 transitions, 805 flow [2024-11-08 17:35:55,384 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=805, PETRI_PLACES=142, PETRI_TRANSITIONS=129} [2024-11-08 17:35:55,385 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 49 predicate places. [2024-11-08 17:35:55,385 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 129 transitions, 805 flow [2024-11-08 17:35:55,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.0625) internal successors, (865), 16 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:35:55,387 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:35:55,387 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 17:35:55,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 17:35:55,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 17:35:55,588 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:35:55,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:35:55,589 INFO L85 PathProgramCache]: Analyzing trace with hash -707882767, now seen corresponding path program 1 times [2024-11-08 17:35:55,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:35:55,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475290735] [2024-11-08 17:35:55,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:35:55,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:35:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:35:55,864 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 17:35:55,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:35:55,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475290735] [2024-11-08 17:35:55,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475290735] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:35:55,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282008641] [2024-11-08 17:35:55,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:35:55,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:35:55,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:35:55,868 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:35:55,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 17:35:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:35:56,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 17:35:56,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:35:56,152 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 17:35:56,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:35:56,236 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 17:35:56,252 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 17:35:56,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282008641] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:35:56,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:35:56,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-08 17:35:56,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587940184] [2024-11-08 17:35:56,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:35:56,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 17:35:56,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:35:56,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 17:35:56,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:35:57,204 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 102 [2024-11-08 17:35:57,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 129 transitions, 805 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 17:35:57,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:35:57,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 102 [2024-11-08 17:35:57,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:35:59,105 INFO L124 PetriNetUnfolderBase]: 6512/12431 cut-off events. [2024-11-08 17:35:59,105 INFO L125 PetriNetUnfolderBase]: For 14336/14524 co-relation queries the response was YES. [2024-11-08 17:35:59,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28799 conditions, 12431 events. 6512/12431 cut-off events. For 14336/14524 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 98855 event pairs, 2058 based on Foata normal form. 0/10965 useless extension candidates. Maximal degree in co-relation 25287. Up to 3051 conditions per place. [2024-11-08 17:35:59,242 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 116 selfloop transitions, 31 changer transitions 0/199 dead transitions. [2024-11-08 17:35:59,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 199 transitions, 1383 flow [2024-11-08 17:35:59,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 17:35:59,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 17:35:59,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 542 transitions. [2024-11-08 17:35:59,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7591036414565826 [2024-11-08 17:35:59,245 INFO L175 Difference]: Start difference. First operand has 142 places, 129 transitions, 805 flow. Second operand 7 states and 542 transitions. [2024-11-08 17:35:59,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 199 transitions, 1383 flow [2024-11-08 17:35:59,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 199 transitions, 1329 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-08 17:35:59,276 INFO L231 Difference]: Finished difference. Result has 143 places, 129 transitions, 829 flow [2024-11-08 17:35:59,278 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=829, PETRI_PLACES=143, PETRI_TRANSITIONS=129} [2024-11-08 17:35:59,278 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 50 predicate places. [2024-11-08 17:35:59,278 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 129 transitions, 829 flow [2024-11-08 17:35:59,279 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 17:35:59,280 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:35:59,280 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 17:35:59,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 17:35:59,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:35:59,484 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:35:59,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:35:59,485 INFO L85 PathProgramCache]: Analyzing trace with hash -707882768, now seen corresponding path program 1 times [2024-11-08 17:35:59,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:35:59,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114711832] [2024-11-08 17:35:59,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:35:59,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:35:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:35:59,567 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 17:35:59,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:35:59,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114711832] [2024-11-08 17:35:59,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114711832] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:35:59,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:35:59,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:35:59,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395649075] [2024-11-08 17:35:59,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:35:59,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:35:59,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:35:59,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:35:59,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:35:59,647 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 102 [2024-11-08 17:35:59,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 129 transitions, 829 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 17:35:59,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:35:59,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 102 [2024-11-08 17:35:59,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:36:01,245 INFO L124 PetriNetUnfolderBase]: 7021/13419 cut-off events. [2024-11-08 17:36:01,245 INFO L125 PetriNetUnfolderBase]: For 17883/18151 co-relation queries the response was YES. [2024-11-08 17:36:01,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32078 conditions, 13419 events. 7021/13419 cut-off events. For 17883/18151 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 107956 event pairs, 5300 based on Foata normal form. 272/12318 useless extension candidates. Maximal degree in co-relation 28363. Up to 9646 conditions per place. [2024-11-08 17:36:01,374 INFO L140 encePairwiseOnDemand]: 96/102 looper letters, 64 selfloop transitions, 13 changer transitions 0/125 dead transitions. [2024-11-08 17:36:01,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 125 transitions, 975 flow [2024-11-08 17:36:01,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:36:01,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:36:01,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 265 transitions. [2024-11-08 17:36:01,376 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6495098039215687 [2024-11-08 17:36:01,376 INFO L175 Difference]: Start difference. First operand has 143 places, 129 transitions, 829 flow. Second operand 4 states and 265 transitions. [2024-11-08 17:36:01,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 125 transitions, 975 flow [2024-11-08 17:36:01,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 125 transitions, 911 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-08 17:36:01,404 INFO L231 Difference]: Finished difference. Result has 137 places, 125 transitions, 783 flow [2024-11-08 17:36:01,404 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=783, PETRI_PLACES=137, PETRI_TRANSITIONS=125} [2024-11-08 17:36:01,405 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 44 predicate places. [2024-11-08 17:36:01,405 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 125 transitions, 783 flow [2024-11-08 17:36:01,406 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 17:36:01,406 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:36:01,406 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 17:36:01,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-08 17:36:01,406 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:36:01,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:36:01,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1850936706, now seen corresponding path program 1 times [2024-11-08 17:36:01,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:36:01,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850074439] [2024-11-08 17:36:01,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:36:01,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:36:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:36:01,652 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 17:36:01,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:36:01,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850074439] [2024-11-08 17:36:01,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850074439] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:36:01,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316941726] [2024-11-08 17:36:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:36:01,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:36:01,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:36:01,656 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:36:01,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 17:36:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:36:01,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 17:36:01,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:36:01,812 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 17:36:01,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:36:01,881 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 17:36:01,893 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 17:36:01,893 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 17:36:01,990 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 17:36:01,990 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:36:02,174 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 17:36:02,258 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 17:36:02,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316941726] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:36:02,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:36:02,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-08 17:36:02,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065758494] [2024-11-08 17:36:02,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:36:02,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 17:36:02,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:36:02,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 17:36:02,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-08 17:36:03,816 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 102 [2024-11-08 17:36:03,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 125 transitions, 783 flow. Second operand has 13 states, 13 states have (on average 60.69230769230769) internal successors, (789), 13 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:36:03,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:36:03,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 102 [2024-11-08 17:36:03,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:36:07,467 INFO L124 PetriNetUnfolderBase]: 11710/21084 cut-off events. [2024-11-08 17:36:07,467 INFO L125 PetriNetUnfolderBase]: For 27041/27923 co-relation queries the response was YES. [2024-11-08 17:36:07,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49331 conditions, 21084 events. 11710/21084 cut-off events. For 27041/27923 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 174271 event pairs, 3361 based on Foata normal form. 0/18969 useless extension candidates. Maximal degree in co-relation 44176. Up to 5478 conditions per place. [2024-11-08 17:36:07,750 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 120 selfloop transitions, 31 changer transitions 0/198 dead transitions. [2024-11-08 17:36:07,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 198 transitions, 1411 flow [2024-11-08 17:36:07,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 17:36:07,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 17:36:07,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 634 transitions. [2024-11-08 17:36:07,752 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.690631808278867 [2024-11-08 17:36:07,752 INFO L175 Difference]: Start difference. First operand has 137 places, 125 transitions, 783 flow. Second operand 9 states and 634 transitions. [2024-11-08 17:36:07,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 198 transitions, 1411 flow [2024-11-08 17:36:07,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 198 transitions, 1397 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:36:07,788 INFO L231 Difference]: Finished difference. Result has 144 places, 126 transitions, 851 flow [2024-11-08 17:36:07,788 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=851, PETRI_PLACES=144, PETRI_TRANSITIONS=126} [2024-11-08 17:36:07,789 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 51 predicate places. [2024-11-08 17:36:07,789 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 126 transitions, 851 flow [2024-11-08 17:36:07,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 60.69230769230769) internal successors, (789), 13 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:36:07,790 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:36:07,790 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 17:36:07,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 17:36:07,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:36:07,992 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:36:07,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:36:07,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1544463937, now seen corresponding path program 1 times [2024-11-08 17:36:07,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:36:07,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694528949] [2024-11-08 17:36:07,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:36:07,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:36:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:36:08,220 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 17:36:08,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:36:08,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694528949] [2024-11-08 17:36:08,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694528949] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:36:08,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577148812] [2024-11-08 17:36:08,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:36:08,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:36:08,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:36:08,224 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:36:08,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 17:36:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:36:08,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 17:36:08,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:36:08,502 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 17:36:08,502 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:36:08,585 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 17:36:08,603 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 17:36:08,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577148812] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:36:08,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:36:08,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-08 17:36:08,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271146214] [2024-11-08 17:36:08,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:36:08,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 17:36:08,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:36:08,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 17:36:08,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-08 17:36:09,512 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 102 [2024-11-08 17:36:09,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 126 transitions, 851 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 17:36:09,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:36:09,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 102 [2024-11-08 17:36:09,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:36:12,354 INFO L124 PetriNetUnfolderBase]: 10579/18622 cut-off events. [2024-11-08 17:36:12,354 INFO L125 PetriNetUnfolderBase]: For 29049/29955 co-relation queries the response was YES. [2024-11-08 17:36:12,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46162 conditions, 18622 events. 10579/18622 cut-off events. For 29049/29955 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 148091 event pairs, 3395 based on Foata normal form. 0/17418 useless extension candidates. Maximal degree in co-relation 41114. Up to 4689 conditions per place. [2024-11-08 17:36:12,539 INFO L140 encePairwiseOnDemand]: 90/102 looper letters, 115 selfloop transitions, 31 changer transitions 0/194 dead transitions. [2024-11-08 17:36:12,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 194 transitions, 1457 flow [2024-11-08 17:36:12,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 17:36:12,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 17:36:12,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 538 transitions. [2024-11-08 17:36:12,542 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7535014005602241 [2024-11-08 17:36:12,542 INFO L175 Difference]: Start difference. First operand has 144 places, 126 transitions, 851 flow. Second operand 7 states and 538 transitions. [2024-11-08 17:36:12,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 194 transitions, 1457 flow [2024-11-08 17:36:12,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 194 transitions, 1403 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-08 17:36:12,635 INFO L231 Difference]: Finished difference. Result has 145 places, 126 transitions, 875 flow [2024-11-08 17:36:12,639 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=875, PETRI_PLACES=145, PETRI_TRANSITIONS=126} [2024-11-08 17:36:12,639 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 52 predicate places. [2024-11-08 17:36:12,639 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 126 transitions, 875 flow [2024-11-08 17:36:12,640 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 17:36:12,640 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:36:12,640 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 17:36:12,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 17:36:12,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:36:12,841 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:36:12,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:36:12,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1562904819, now seen corresponding path program 1 times [2024-11-08 17:36:12,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:36:12,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34167591] [2024-11-08 17:36:12,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:36:12,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:36:12,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:36:13,266 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 17:36:13,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:36:13,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34167591] [2024-11-08 17:36:13,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34167591] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:36:13,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695333141] [2024-11-08 17:36:13,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:36:13,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:36:13,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:36:13,270 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:36:13,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 17:36:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:36:13,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 17:36:13,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:36:13,579 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 17:36:13,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:36:13,714 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 17:36:13,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695333141] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:36:13,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:36:13,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-08 17:36:13,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194880215] [2024-11-08 17:36:13,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:36:13,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 17:36:13,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:36:13,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 17:36:13,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-08 17:36:14,404 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 102 [2024-11-08 17:36:14,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 126 transitions, 875 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 17:36:14,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:36:14,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 102 [2024-11-08 17:36:14,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:36:23,882 INFO L124 PetriNetUnfolderBase]: 30373/53050 cut-off events. [2024-11-08 17:36:23,882 INFO L125 PetriNetUnfolderBase]: For 91896/94580 co-relation queries the response was YES. [2024-11-08 17:36:24,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137349 conditions, 53050 events. 30373/53050 cut-off events. For 91896/94580 co-relation queries the response was YES. Maximal size of possible extension queue 1818. Compared 486743 event pairs, 10904 based on Foata normal form. 744/51129 useless extension candidates. Maximal degree in co-relation 73941. Up to 12896 conditions per place. [2024-11-08 17:36:24,513 INFO L140 encePairwiseOnDemand]: 85/102 looper letters, 334 selfloop transitions, 57 changer transitions 0/423 dead transitions. [2024-11-08 17:36:24,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 423 transitions, 3366 flow [2024-11-08 17:36:24,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-08 17:36:24,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-08 17:36:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1856 transitions. [2024-11-08 17:36:24,517 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6274509803921569 [2024-11-08 17:36:24,517 INFO L175 Difference]: Start difference. First operand has 145 places, 126 transitions, 875 flow. Second operand 29 states and 1856 transitions. [2024-11-08 17:36:24,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 423 transitions, 3366 flow [2024-11-08 17:36:24,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 423 transitions, 3215 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-11-08 17:36:24,681 INFO L231 Difference]: Finished difference. Result has 178 places, 159 transitions, 1240 flow [2024-11-08 17:36:24,681 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1240, PETRI_PLACES=178, PETRI_TRANSITIONS=159} [2024-11-08 17:36:24,682 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 85 predicate places. [2024-11-08 17:36:24,682 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 159 transitions, 1240 flow [2024-11-08 17:36:24,682 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 17:36:24,683 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:36:24,683 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 17:36:24,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 17:36:24,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-08 17:36:24,883 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:36:24,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:36:24,884 INFO L85 PathProgramCache]: Analyzing trace with hash 988367591, now seen corresponding path program 1 times [2024-11-08 17:36:24,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:36:24,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141599298] [2024-11-08 17:36:24,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:36:24,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:36:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:36:25,007 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 17:36:25,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:36:25,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141599298] [2024-11-08 17:36:25,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141599298] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:36:25,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155790274] [2024-11-08 17:36:25,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:36:25,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:36:25,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:36:25,010 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:36:25,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 17:36:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:36:25,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 17:36:25,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:36:25,232 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 17:36:25,233 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:36:25,330 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 17:36:25,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155790274] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:36:25,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:36:25,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-08 17:36:25,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074691176] [2024-11-08 17:36:25,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:36:25,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 17:36:25,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:36:25,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 17:36:25,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-08 17:36:25,832 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 102 [2024-11-08 17:36:25,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 159 transitions, 1240 flow. Second operand has 16 states, 16 states have (on average 57.3125) internal successors, (917), 16 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:36:25,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:36:25,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 102 [2024-11-08 17:36:25,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:36:41,068 INFO L124 PetriNetUnfolderBase]: 47420/83843 cut-off events. [2024-11-08 17:36:41,068 INFO L125 PetriNetUnfolderBase]: For 175516/181488 co-relation queries the response was YES. [2024-11-08 17:36:41,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221480 conditions, 83843 events. 47420/83843 cut-off events. For 175516/181488 co-relation queries the response was YES. Maximal size of possible extension queue 2853. Compared 827236 event pairs, 15750 based on Foata normal form. 1228/80803 useless extension candidates. Maximal degree in co-relation 131216. Up to 21630 conditions per place. [2024-11-08 17:36:41,889 INFO L140 encePairwiseOnDemand]: 84/102 looper letters, 354 selfloop transitions, 99 changer transitions 0/485 dead transitions. [2024-11-08 17:36:41,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 485 transitions, 4309 flow [2024-11-08 17:36:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-08 17:36:41,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-08 17:36:41,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1816 transitions. [2024-11-08 17:36:41,893 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6358543417366946 [2024-11-08 17:36:41,893 INFO L175 Difference]: Start difference. First operand has 178 places, 159 transitions, 1240 flow. Second operand 28 states and 1816 transitions. [2024-11-08 17:36:41,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 485 transitions, 4309 flow [2024-11-08 17:36:42,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 485 transitions, 4268 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-08 17:36:42,239 INFO L231 Difference]: Finished difference. Result has 213 places, 207 transitions, 2045 flow [2024-11-08 17:36:42,239 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2045, PETRI_PLACES=213, PETRI_TRANSITIONS=207} [2024-11-08 17:36:42,240 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 120 predicate places. [2024-11-08 17:36:42,240 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 207 transitions, 2045 flow [2024-11-08 17:36:42,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.3125) internal successors, (917), 16 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:36:42,240 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:36:42,240 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:36:42,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-08 17:36:42,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_417be156-90c9-4dcd-9a8a-f49dbcf1d8a8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:36:42,441 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-08 17:36:42,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:36:42,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1829083736, now seen corresponding path program 1 times [2024-11-08 17:36:42,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:36:42,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451076196] [2024-11-08 17:36:42,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:36:42,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:36:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:36:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:36:42,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:36:42,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451076196] [2024-11-08 17:36:42,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451076196] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:36:42,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:36:42,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-08 17:36:42,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249010156] [2024-11-08 17:36:42,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:36:42,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 17:36:42,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:36:42,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 17:36:42,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-08 17:36:43,595 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 102 [2024-11-08 17:36:43,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 207 transitions, 2045 flow. Second operand has 10 states, 10 states have (on average 61.3) internal successors, (613), 10 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:36:43,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:36:43,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 102 [2024-11-08 17:36:43,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand