./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-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_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/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_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/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_6421a7ca-e68c-4bc4-87f4-37dfd164796a/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 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 17:32:57,895 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 17:32:58,039 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 17:32:58,050 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 17:32:58,051 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 17:32:58,087 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 17:32:58,088 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 17:32:58,090 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 17:32:58,091 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 17:32:58,093 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 17:32:58,093 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 17:32:58,094 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 17:32:58,095 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 17:32:58,095 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 17:32:58,098 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 17:32:58,099 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 17:32:58,099 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 17:32:58,100 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 17:32:58,100 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 17:32:58,100 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 17:32:58,101 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 17:32:58,105 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 17:32:58,106 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 17:32:58,106 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 17:32:58,106 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 17:32:58,107 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 17:32:58,107 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 17:32:58,107 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 17:32:58,108 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 17:32:58,108 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 17:32:58,109 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 17:32:58,109 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 17:32:58,111 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 17:32:58,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:32:58,112 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 17:32:58,113 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 17:32:58,114 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 17:32:58,114 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 17:32:58,115 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 17:32:58,115 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 17:32:58,115 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 17:32:58,116 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 17:32:58,116 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_6421a7ca-e68c-4bc4-87f4-37dfd164796a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c [2024-11-08 17:32:58,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 17:32:58,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 17:32:58,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 17:32:58,559 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 17:32:58,563 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 17:32:58,565 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c Unable to find full path for "g++" [2024-11-08 17:33:00,976 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 17:33:01,220 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 17:33:01,220 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-11-08 17:33:01,236 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/data/2354da524/23940676b5c143c1bde542cee3f4dd97/FLAGbda7533e7 [2024-11-08 17:33:01,565 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/data/2354da524/23940676b5c143c1bde542cee3f4dd97 [2024-11-08 17:33:01,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 17:33:01,571 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 17:33:01,573 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 17:33:01,573 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 17:33:01,581 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 17:33:01,586 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:33:01" (1/1) ... [2024-11-08 17:33:01,588 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6faf9308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:01, skipping insertion in model container [2024-11-08 17:33:01,588 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:33:01" (1/1) ... [2024-11-08 17:33:01,623 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 17:33:01,916 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 17:33:01,922 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:33:01,935 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 17:33:01,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:33:02,003 INFO L204 MainTranslator]: Completed translation [2024-11-08 17:33:02,004 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:02 WrapperNode [2024-11-08 17:33:02,004 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 17:33:02,005 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 17:33:02,006 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 17:33:02,006 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 17:33:02,016 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:02" (1/1) ... [2024-11-08 17:33:02,027 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:02" (1/1) ... [2024-11-08 17:33:02,073 INFO L138 Inliner]: procedures = 25, calls = 33, calls flagged for inlining = 18, calls inlined = 26, statements flattened = 267 [2024-11-08 17:33:02,074 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 17:33:02,075 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 17:33:02,075 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 17:33:02,075 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 17:33:02,090 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:02" (1/1) ... [2024-11-08 17:33:02,090 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:02" (1/1) ... [2024-11-08 17:33:02,095 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:02" (1/1) ... [2024-11-08 17:33:02,131 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 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 17:33:02,132 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:02" (1/1) ... [2024-11-08 17:33:02,132 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:02" (1/1) ... [2024-11-08 17:33:02,158 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:02" (1/1) ... [2024-11-08 17:33:02,164 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:02" (1/1) ... [2024-11-08 17:33:02,166 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:02" (1/1) ... [2024-11-08 17:33:02,169 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:02" (1/1) ... [2024-11-08 17:33:02,174 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 17:33:02,175 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 17:33:02,175 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 17:33:02,175 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 17:33:02,177 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:02" (1/1) ... [2024-11-08 17:33:02,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:33:02,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:33:02,227 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 17:33:02,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 17:33:02,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 17:33:02,277 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 17:33:02,277 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 17:33:02,277 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 17:33:02,278 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 17:33:02,278 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-08 17:33:02,278 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-08 17:33:02,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 17:33:02,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 17:33:02,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 17:33:02,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 17:33:02,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 17:33:02,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 17:33:02,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 17:33:02,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 17:33:02,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 17:33:02,284 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 17:33:02,453 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 17:33:02,455 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 17:33:03,207 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 17:33:03,208 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 17:33:03,743 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 17:33:03,744 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 17:33:03,744 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:33:03 BoogieIcfgContainer [2024-11-08 17:33:03,744 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 17:33:03,747 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 17:33:03,747 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 17:33:03,751 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 17:33:03,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 05:33:01" (1/3) ... [2024-11-08 17:33:03,752 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a21b0d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:33:03, skipping insertion in model container [2024-11-08 17:33:03,752 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:33:02" (2/3) ... [2024-11-08 17:33:03,753 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a21b0d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:33:03, skipping insertion in model container [2024-11-08 17:33:03,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:33:03" (3/3) ... [2024-11-08 17:33:03,756 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2024-11-08 17:33:03,781 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 17:33:03,782 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-08 17:33:03,782 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 17:33:03,906 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-08 17:33:03,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 78 transitions, 177 flow [2024-11-08 17:33:04,064 INFO L124 PetriNetUnfolderBase]: 12/75 cut-off events. [2024-11-08 17:33:04,065 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-08 17:33:04,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 75 events. 12/75 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 183 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2024-11-08 17:33:04,072 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 78 transitions, 177 flow [2024-11-08 17:33:04,079 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 74 transitions, 166 flow [2024-11-08 17:33:04,102 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 17:33:04,115 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;@62080461, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 17:33:04,115 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-08 17:33:04,122 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 17:33:04,123 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-11-08 17:33:04,123 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 17:33:04,123 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:04,124 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 17:33:04,125 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:33:04,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:04,134 INFO L85 PathProgramCache]: Analyzing trace with hash 27262177, now seen corresponding path program 1 times [2024-11-08 17:33:04,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:04,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489809368] [2024-11-08 17:33:04,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:04,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:04,537 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 17:33:04,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:04,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489809368] [2024-11-08 17:33:04,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489809368] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:33:04,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:33:04,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 17:33:04,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240513800] [2024-11-08 17:33:04,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:33:04,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:33:04,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:04,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:33:04,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:33:04,662 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 78 [2024-11-08 17:33:04,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 17:33:04,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:04,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 78 [2024-11-08 17:33:04,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:33:04,953 INFO L124 PetriNetUnfolderBase]: 231/548 cut-off events. [2024-11-08 17:33:04,953 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-08 17:33:04,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 893 conditions, 548 events. 231/548 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2941 event pairs, 124 based on Foata normal form. 1/390 useless extension candidates. Maximal degree in co-relation 768. Up to 293 conditions per place. [2024-11-08 17:33:04,965 INFO L140 encePairwiseOnDemand]: 72/78 looper letters, 27 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2024-11-08 17:33:04,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 69 transitions, 214 flow [2024-11-08 17:33:04,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:33:04,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:33:04,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2024-11-08 17:33:04,981 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7051282051282052 [2024-11-08 17:33:04,984 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 166 flow. Second operand 3 states and 165 transitions. [2024-11-08 17:33:04,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 69 transitions, 214 flow [2024-11-08 17:33:04,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 69 transitions, 202 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 17:33:04,992 INFO L231 Difference]: Finished difference. Result has 63 places, 69 transitions, 148 flow [2024-11-08 17:33:04,995 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=63, PETRI_TRANSITIONS=69} [2024-11-08 17:33:04,999 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2024-11-08 17:33:05,000 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 69 transitions, 148 flow [2024-11-08 17:33:05,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 17:33:05,000 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:05,001 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 17:33:05,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 17:33:05,001 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:33:05,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:05,002 INFO L85 PathProgramCache]: Analyzing trace with hash 27262178, now seen corresponding path program 1 times [2024-11-08 17:33:05,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:05,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110072097] [2024-11-08 17:33:05,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:05,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:05,396 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 17:33:05,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:05,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110072097] [2024-11-08 17:33:05,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110072097] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:33:05,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:33:05,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:33:05,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621556997] [2024-11-08 17:33:05,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:33:05,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:33:05,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:05,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:33:05,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:33:05,568 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 78 [2024-11-08 17:33:05,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 69 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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 17:33:05,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:05,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 78 [2024-11-08 17:33:05,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:33:05,791 INFO L124 PetriNetUnfolderBase]: 237/566 cut-off events. [2024-11-08 17:33:05,792 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-08 17:33:05,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 898 conditions, 566 events. 237/566 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3026 event pairs, 124 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 830. Up to 306 conditions per place. [2024-11-08 17:33:05,800 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 34 selfloop transitions, 7 changer transitions 0/78 dead transitions. [2024-11-08 17:33:05,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 78 transitions, 250 flow [2024-11-08 17:33:05,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:33:05,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:33:05,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 176 transitions. [2024-11-08 17:33:05,803 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7521367521367521 [2024-11-08 17:33:05,803 INFO L175 Difference]: Start difference. First operand has 63 places, 69 transitions, 148 flow. Second operand 3 states and 176 transitions. [2024-11-08 17:33:05,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 78 transitions, 250 flow [2024-11-08 17:33:05,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:33:05,807 INFO L231 Difference]: Finished difference. Result has 65 places, 75 transitions, 202 flow [2024-11-08 17:33:05,807 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=65, PETRI_TRANSITIONS=75} [2024-11-08 17:33:05,808 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -7 predicate places. [2024-11-08 17:33:05,808 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 75 transitions, 202 flow [2024-11-08 17:33:05,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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 17:33:05,809 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:05,809 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-08 17:33:05,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 17:33:05,810 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:33:05,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:05,810 INFO L85 PathProgramCache]: Analyzing trace with hash 419593206, now seen corresponding path program 1 times [2024-11-08 17:33:05,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:05,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077101370] [2024-11-08 17:33:05,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:05,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:06,172 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 17:33:06,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:06,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077101370] [2024-11-08 17:33:06,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077101370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:33:06,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815429414] [2024-11-08 17:33:06,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:06,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:33:06,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:33:06,178 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:33:06,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 17:33:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:06,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 17:33:06,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:33:06,400 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 17:33:06,543 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 17:33:06,544 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:33:06,693 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 17:33:06,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815429414] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:33:06,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:33:06,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-08 17:33:06,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635659332] [2024-11-08 17:33:06,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:33:06,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 17:33:06,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:06,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 17:33:06,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-08 17:33:07,076 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 78 [2024-11-08 17:33:07,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 75 transitions, 202 flow. Second operand has 9 states, 9 states have (on average 39.666666666666664) internal successors, (357), 9 states have internal predecessors, (357), 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 17:33:07,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:07,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 78 [2024-11-08 17:33:07,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:33:07,649 INFO L124 PetriNetUnfolderBase]: 255/620 cut-off events. [2024-11-08 17:33:07,649 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-08 17:33:07,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1054 conditions, 620 events. 255/620 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3395 event pairs, 124 based on Foata normal form. 0/446 useless extension candidates. Maximal degree in co-relation 830. Up to 315 conditions per place. [2024-11-08 17:33:07,659 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 73 selfloop transitions, 25 changer transitions 0/129 dead transitions. [2024-11-08 17:33:07,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 129 transitions, 554 flow [2024-11-08 17:33:07,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:33:07,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 17:33:07,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 335 transitions. [2024-11-08 17:33:07,663 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7158119658119658 [2024-11-08 17:33:07,663 INFO L175 Difference]: Start difference. First operand has 65 places, 75 transitions, 202 flow. Second operand 6 states and 335 transitions. [2024-11-08 17:33:07,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 129 transitions, 554 flow [2024-11-08 17:33:07,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 129 transitions, 528 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:33:07,673 INFO L231 Difference]: Finished difference. Result has 71 places, 93 transitions, 363 flow [2024-11-08 17:33:07,673 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=363, PETRI_PLACES=71, PETRI_TRANSITIONS=93} [2024-11-08 17:33:07,675 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2024-11-08 17:33:07,675 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 93 transitions, 363 flow [2024-11-08 17:33:07,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 39.666666666666664) internal successors, (357), 9 states have internal predecessors, (357), 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 17:33:07,676 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:07,677 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:33:07,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 17:33:07,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:33:07,881 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:33:07,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:07,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1098456848, now seen corresponding path program 1 times [2024-11-08 17:33:07,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:07,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175811164] [2024-11-08 17:33:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:07,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:08,044 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 17:33:08,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:08,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175811164] [2024-11-08 17:33:08,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175811164] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:33:08,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:33:08,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:33:08,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647892040] [2024-11-08 17:33:08,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:33:08,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:33:08,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:08,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:33:08,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:33:08,076 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 78 [2024-11-08 17:33:08,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 93 transitions, 363 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 17:33:08,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:08,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 78 [2024-11-08 17:33:08,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:33:08,333 INFO L124 PetriNetUnfolderBase]: 249/611 cut-off events. [2024-11-08 17:33:08,334 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-11-08 17:33:08,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1075 conditions, 611 events. 249/611 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3177 event pairs, 124 based on Foata normal form. 3/446 useless extension candidates. Maximal degree in co-relation 942. Up to 347 conditions per place. [2024-11-08 17:33:08,341 INFO L140 encePairwiseOnDemand]: 66/78 looper letters, 47 selfloop transitions, 12 changer transitions 0/93 dead transitions. [2024-11-08 17:33:08,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 93 transitions, 473 flow [2024-11-08 17:33:08,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:33:08,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:33:08,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 170 transitions. [2024-11-08 17:33:08,343 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7264957264957265 [2024-11-08 17:33:08,344 INFO L175 Difference]: Start difference. First operand has 71 places, 93 transitions, 363 flow. Second operand 3 states and 170 transitions. [2024-11-08 17:33:08,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 93 transitions, 473 flow [2024-11-08 17:33:08,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 93 transitions, 435 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-11-08 17:33:08,350 INFO L231 Difference]: Finished difference. Result has 73 places, 90 transitions, 359 flow [2024-11-08 17:33:08,351 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=359, PETRI_PLACES=73, PETRI_TRANSITIONS=90} [2024-11-08 17:33:08,352 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2024-11-08 17:33:08,352 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 90 transitions, 359 flow [2024-11-08 17:33:08,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 17:33:08,353 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:08,353 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2024-11-08 17:33:08,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 17:33:08,353 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:33:08,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:08,354 INFO L85 PathProgramCache]: Analyzing trace with hash -484324382, now seen corresponding path program 2 times [2024-11-08 17:33:08,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:08,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61537164] [2024-11-08 17:33:08,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:08,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:33:09,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:09,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61537164] [2024-11-08 17:33:09,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61537164] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:33:09,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664926187] [2024-11-08 17:33:09,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:33:09,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:33:09,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:33:09,063 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:33:09,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 17:33:09,185 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:33:09,185 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:33:09,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-08 17:33:09,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:33:09,255 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 17:33:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:33:09,706 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:33:10,230 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:33:10,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664926187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:33:10,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:33:10,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-08 17:33:10,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642009113] [2024-11-08 17:33:10,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:33:10,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 17:33:10,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:10,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 17:33:10,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2024-11-08 17:33:11,605 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 78 [2024-11-08 17:33:11,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 90 transitions, 359 flow. Second operand has 20 states, 20 states have (on average 37.4) internal successors, (748), 20 states have internal predecessors, (748), 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 17:33:11,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:11,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 78 [2024-11-08 17:33:11,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:33:12,875 INFO L124 PetriNetUnfolderBase]: 231/593 cut-off events. [2024-11-08 17:33:12,876 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2024-11-08 17:33:12,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 593 events. 231/593 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2958 event pairs, 124 based on Foata normal form. 30/467 useless extension candidates. Maximal degree in co-relation 882. Up to 294 conditions per place. [2024-11-08 17:33:12,884 INFO L140 encePairwiseOnDemand]: 59/78 looper letters, 58 selfloop transitions, 28 changer transitions 0/114 dead transitions. [2024-11-08 17:33:12,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 114 transitions, 530 flow [2024-11-08 17:33:12,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 17:33:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 17:33:12,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 431 transitions. [2024-11-08 17:33:12,891 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.613960113960114 [2024-11-08 17:33:12,891 INFO L175 Difference]: Start difference. First operand has 73 places, 90 transitions, 359 flow. Second operand 9 states and 431 transitions. [2024-11-08 17:33:12,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 114 transitions, 530 flow [2024-11-08 17:33:12,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 114 transitions, 472 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-11-08 17:33:12,896 INFO L231 Difference]: Finished difference. Result has 77 places, 87 transitions, 392 flow [2024-11-08 17:33:12,896 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=392, PETRI_PLACES=77, PETRI_TRANSITIONS=87} [2024-11-08 17:33:12,897 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2024-11-08 17:33:12,897 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 87 transitions, 392 flow [2024-11-08 17:33:12,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 37.4) internal successors, (748), 20 states have internal predecessors, (748), 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 17:33:12,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:12,898 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:33:12,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 17:33:13,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:33:13,103 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:33:13,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:13,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1161342792, now seen corresponding path program 1 times [2024-11-08 17:33:13,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:13,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342204012] [2024-11-08 17:33:13,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:13,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:13,721 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-08 17:33:13,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:13,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342204012] [2024-11-08 17:33:13,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342204012] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:33:13,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:33:13,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:33:13,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277060322] [2024-11-08 17:33:13,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:33:13,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:33:13,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:13,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:33:13,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:33:13,800 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 78 [2024-11-08 17:33:13,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 87 transitions, 392 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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 17:33:13,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:13,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 78 [2024-11-08 17:33:13,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:33:14,107 INFO L124 PetriNetUnfolderBase]: 388/919 cut-off events. [2024-11-08 17:33:14,107 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2024-11-08 17:33:14,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1603 conditions, 919 events. 388/919 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5361 event pairs, 234 based on Foata normal form. 0/704 useless extension candidates. Maximal degree in co-relation 1390. Up to 495 conditions per place. [2024-11-08 17:33:14,116 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 44 selfloop transitions, 5 changer transitions 0/85 dead transitions. [2024-11-08 17:33:14,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 85 transitions, 486 flow [2024-11-08 17:33:14,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:33:14,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:33:14,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 233 transitions. [2024-11-08 17:33:14,118 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5974358974358974 [2024-11-08 17:33:14,119 INFO L175 Difference]: Start difference. First operand has 77 places, 87 transitions, 392 flow. Second operand 5 states and 233 transitions. [2024-11-08 17:33:14,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 85 transitions, 486 flow [2024-11-08 17:33:14,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 85 transitions, 437 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-08 17:33:14,125 INFO L231 Difference]: Finished difference. Result has 73 places, 85 transitions, 349 flow [2024-11-08 17:33:14,127 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=349, PETRI_PLACES=73, PETRI_TRANSITIONS=85} [2024-11-08 17:33:14,128 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2024-11-08 17:33:14,129 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 85 transitions, 349 flow [2024-11-08 17:33:14,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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 17:33:14,129 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:14,130 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:33:14,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 17:33:14,130 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:33:14,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:14,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1161342791, now seen corresponding path program 1 times [2024-11-08 17:33:14,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:14,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091238759] [2024-11-08 17:33:14,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:14,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-08 17:33:15,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:15,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091238759] [2024-11-08 17:33:15,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091238759] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:33:15,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214371841] [2024-11-08 17:33:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:15,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:33:15,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:33:15,725 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:33:15,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 17:33:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:15,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-08 17:33:15,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:33:15,989 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 17:33:15,999 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 17:33:16,212 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 17:33:16,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-08 17:33:16,244 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 17:33:16,245 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 17:33:16,830 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-08 17:33:16,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 25 [2024-11-08 17:33:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:33:17,292 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:33:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:33:18,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214371841] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 17:33:18,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:33:18,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 26 [2024-11-08 17:33:18,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832467982] [2024-11-08 17:33:18,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:33:18,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 17:33:18,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:18,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 17:33:18,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2024-11-08 17:33:20,250 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2024-11-08 17:33:20,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 85 transitions, 349 flow. Second operand has 11 states, 11 states have (on average 46.90909090909091) internal successors, (516), 11 states have internal predecessors, (516), 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 17:33:20,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:20,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2024-11-08 17:33:20,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:33:21,110 INFO L124 PetriNetUnfolderBase]: 522/1179 cut-off events. [2024-11-08 17:33:21,111 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2024-11-08 17:33:21,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2023 conditions, 1179 events. 522/1179 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6842 event pairs, 169 based on Foata normal form. 0/879 useless extension candidates. Maximal degree in co-relation 1811. Up to 352 conditions per place. [2024-11-08 17:33:21,126 INFO L140 encePairwiseOnDemand]: 71/78 looper letters, 58 selfloop transitions, 8 changer transitions 0/102 dead transitions. [2024-11-08 17:33:21,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 102 transitions, 520 flow [2024-11-08 17:33:21,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:33:21,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 17:33:21,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 319 transitions. [2024-11-08 17:33:21,133 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6816239316239316 [2024-11-08 17:33:21,133 INFO L175 Difference]: Start difference. First operand has 73 places, 85 transitions, 349 flow. Second operand 6 states and 319 transitions. [2024-11-08 17:33:21,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 102 transitions, 520 flow [2024-11-08 17:33:21,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 102 transitions, 512 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 17:33:21,140 INFO L231 Difference]: Finished difference. Result has 77 places, 86 transitions, 371 flow [2024-11-08 17:33:21,141 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=371, PETRI_PLACES=77, PETRI_TRANSITIONS=86} [2024-11-08 17:33:21,142 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2024-11-08 17:33:21,142 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 86 transitions, 371 flow [2024-11-08 17:33:21,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 46.90909090909091) internal successors, (516), 11 states have internal predecessors, (516), 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 17:33:21,147 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:21,147 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:33:21,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-08 17:33:21,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:33:21,349 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:33:21,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:21,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1641887299, now seen corresponding path program 1 times [2024-11-08 17:33:21,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:21,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167249881] [2024-11-08 17:33:21,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:21,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-08 17:33:21,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:21,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167249881] [2024-11-08 17:33:21,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167249881] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:33:21,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:33:21,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:33:21,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568498871] [2024-11-08 17:33:21,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:33:21,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:33:21,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:21,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:33:21,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:33:21,741 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 78 [2024-11-08 17:33:21,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 86 transitions, 371 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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 17:33:21,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:21,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 78 [2024-11-08 17:33:21,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:33:22,013 INFO L124 PetriNetUnfolderBase]: 447/974 cut-off events. [2024-11-08 17:33:22,013 INFO L125 PetriNetUnfolderBase]: For 307/332 co-relation queries the response was YES. [2024-11-08 17:33:22,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1875 conditions, 974 events. 447/974 cut-off events. For 307/332 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5330 event pairs, 299 based on Foata normal form. 27/823 useless extension candidates. Maximal degree in co-relation 1660. Up to 593 conditions per place. [2024-11-08 17:33:22,024 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 43 selfloop transitions, 5 changer transitions 0/84 dead transitions. [2024-11-08 17:33:22,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 84 transitions, 463 flow [2024-11-08 17:33:22,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:33:22,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:33:22,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 237 transitions. [2024-11-08 17:33:22,026 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6076923076923076 [2024-11-08 17:33:22,029 INFO L175 Difference]: Start difference. First operand has 77 places, 86 transitions, 371 flow. Second operand 5 states and 237 transitions. [2024-11-08 17:33:22,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 84 transitions, 463 flow [2024-11-08 17:33:22,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 452 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 17:33:22,033 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 366 flow [2024-11-08 17:33:22,036 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=366, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2024-11-08 17:33:22,037 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2024-11-08 17:33:22,037 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 366 flow [2024-11-08 17:33:22,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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 17:33:22,038 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:22,038 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:33:22,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 17:33:22,040 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:33:22,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:22,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1641887298, now seen corresponding path program 1 times [2024-11-08 17:33:22,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:22,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063335303] [2024-11-08 17:33:22,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:22,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:33:22,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:22,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063335303] [2024-11-08 17:33:22,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063335303] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:33:22,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257198580] [2024-11-08 17:33:22,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:22,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:33:22,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:33:22,699 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:33:22,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 17:33:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:22,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 17:33:22,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:33:22,896 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 17:33:23,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:33:23,140 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 17:33:23,152 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 17:33:23,153 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 17:33:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:33:23,324 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:33:23,618 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 17:33:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:33:24,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257198580] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:33:24,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:33:24,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-11-08 17:33:24,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523514119] [2024-11-08 17:33:24,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:33:24,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-08 17:33:24,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:24,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-08 17:33:24,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2024-11-08 17:33:26,251 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 78 [2024-11-08 17:33:26,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 366 flow. Second operand has 26 states, 26 states have (on average 45.19230769230769) internal successors, (1175), 26 states have internal predecessors, (1175), 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 17:33:26,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:26,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 78 [2024-11-08 17:33:26,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:33:27,182 INFO L124 PetriNetUnfolderBase]: 628/1410 cut-off events. [2024-11-08 17:33:27,182 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2024-11-08 17:33:27,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2648 conditions, 1410 events. 628/1410 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 8195 event pairs, 169 based on Foata normal form. 52/1179 useless extension candidates. Maximal degree in co-relation 2432. Up to 378 conditions per place. [2024-11-08 17:33:27,196 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 72 selfloop transitions, 22 changer transitions 0/130 dead transitions. [2024-11-08 17:33:27,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 130 transitions, 662 flow [2024-11-08 17:33:27,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 17:33:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-08 17:33:27,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 735 transitions. [2024-11-08 17:33:27,199 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-11-08 17:33:27,199 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 366 flow. Second operand 15 states and 735 transitions. [2024-11-08 17:33:27,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 130 transitions, 662 flow [2024-11-08 17:33:27,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 130 transitions, 654 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 17:33:27,203 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 422 flow [2024-11-08 17:33:27,204 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=422, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2024-11-08 17:33:27,204 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 16 predicate places. [2024-11-08 17:33:27,205 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 422 flow [2024-11-08 17:33:27,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 45.19230769230769) internal successors, (1175), 26 states have internal predecessors, (1175), 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 17:33:27,206 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:27,206 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:33:27,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 17:33:27,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:33:27,411 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:33:27,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:27,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1359027803, now seen corresponding path program 1 times [2024-11-08 17:33:27,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:27,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353731281] [2024-11-08 17:33:27,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:27,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 17:33:28,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:28,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353731281] [2024-11-08 17:33:28,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353731281] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:33:28,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24973425] [2024-11-08 17:33:28,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:28,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:33:28,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:33:28,517 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:33:28,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 17:33:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:28,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-08 17:33:28,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:33:28,700 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 17:33:28,707 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 17:33:28,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:33:28,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 17:33:28,844 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 17:33:28,844 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 17:33:28,933 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 17:33:28,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-08 17:33:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:33:29,514 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:33:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:33:30,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24973425] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 17:33:30,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:33:30,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 9] total 24 [2024-11-08 17:33:30,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590527148] [2024-11-08 17:33:30,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:33:30,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 17:33:30,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:30,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 17:33:30,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2024-11-08 17:33:31,076 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2024-11-08 17:33:31,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 422 flow. Second operand has 11 states, 11 states have (on average 47.09090909090909) internal successors, (518), 11 states have internal predecessors, (518), 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 17:33:31,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:31,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2024-11-08 17:33:31,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:33:31,757 INFO L124 PetriNetUnfolderBase]: 1234/2546 cut-off events. [2024-11-08 17:33:31,757 INFO L125 PetriNetUnfolderBase]: For 1601/1652 co-relation queries the response was YES. [2024-11-08 17:33:31,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5133 conditions, 2546 events. 1234/2546 cut-off events. For 1601/1652 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16942 event pairs, 441 based on Foata normal form. 0/1967 useless extension candidates. Maximal degree in co-relation 4900. Up to 854 conditions per place. [2024-11-08 17:33:31,784 INFO L140 encePairwiseOnDemand]: 71/78 looper letters, 60 selfloop transitions, 8 changer transitions 0/103 dead transitions. [2024-11-08 17:33:31,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 103 transitions, 620 flow [2024-11-08 17:33:31,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:33:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 17:33:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 317 transitions. [2024-11-08 17:33:31,786 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6773504273504274 [2024-11-08 17:33:31,786 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 422 flow. Second operand 6 states and 317 transitions. [2024-11-08 17:33:31,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 103 transitions, 620 flow [2024-11-08 17:33:31,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 103 transitions, 584 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-08 17:33:31,790 INFO L231 Difference]: Finished difference. Result has 88 places, 87 transitions, 416 flow [2024-11-08 17:33:31,790 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=416, PETRI_PLACES=88, PETRI_TRANSITIONS=87} [2024-11-08 17:33:31,791 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 16 predicate places. [2024-11-08 17:33:31,791 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 87 transitions, 416 flow [2024-11-08 17:33:31,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 47.09090909090909) internal successors, (518), 11 states have internal predecessors, (518), 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 17:33:31,791 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:31,792 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:33:31,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 17:33:31,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-08 17:33:31,993 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:33:31,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:31,993 INFO L85 PathProgramCache]: Analyzing trace with hash 819811933, now seen corresponding path program 1 times [2024-11-08 17:33:31,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:31,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627203301] [2024-11-08 17:33:31,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:31,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-08 17:33:32,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:32,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627203301] [2024-11-08 17:33:32,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627203301] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:33:32,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:33:32,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:33:32,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246435110] [2024-11-08 17:33:32,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:33:32,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:33:32,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:32,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:33:32,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:33:32,189 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 78 [2024-11-08 17:33:32,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 87 transitions, 416 flow. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 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 17:33:32,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:32,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 78 [2024-11-08 17:33:32,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:33:32,549 INFO L124 PetriNetUnfolderBase]: 826/1775 cut-off events. [2024-11-08 17:33:32,549 INFO L125 PetriNetUnfolderBase]: For 1514/1579 co-relation queries the response was YES. [2024-11-08 17:33:32,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3921 conditions, 1775 events. 826/1775 cut-off events. For 1514/1579 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11521 event pairs, 590 based on Foata normal form. 37/1481 useless extension candidates. Maximal degree in co-relation 3699. Up to 1094 conditions per place. [2024-11-08 17:33:32,567 INFO L140 encePairwiseOnDemand]: 74/78 looper letters, 46 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2024-11-08 17:33:32,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 85 transitions, 510 flow [2024-11-08 17:33:32,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:33:32,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:33:32,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 199 transitions. [2024-11-08 17:33:32,569 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6378205128205128 [2024-11-08 17:33:32,569 INFO L175 Difference]: Start difference. First operand has 88 places, 87 transitions, 416 flow. Second operand 4 states and 199 transitions. [2024-11-08 17:33:32,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 85 transitions, 510 flow [2024-11-08 17:33:32,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 85 transitions, 499 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 17:33:32,573 INFO L231 Difference]: Finished difference. Result has 85 places, 85 transitions, 407 flow [2024-11-08 17:33:32,574 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=407, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2024-11-08 17:33:32,574 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 13 predicate places. [2024-11-08 17:33:32,574 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 407 flow [2024-11-08 17:33:32,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 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 17:33:32,575 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:32,575 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:33:32,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-08 17:33:32,575 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:33:32,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:32,576 INFO L85 PathProgramCache]: Analyzing trace with hash 819811934, now seen corresponding path program 1 times [2024-11-08 17:33:32,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:32,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684385868] [2024-11-08 17:33:32,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:32,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 17:33:32,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:32,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684385868] [2024-11-08 17:33:32,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684385868] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:33:32,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558570329] [2024-11-08 17:33:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:32,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:33:32,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:33:32,916 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:33:32,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 17:33:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:33,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-08 17:33:33,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:33:33,119 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 17:33:33,350 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 17:33:33,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-08 17:33:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:33:33,481 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:33:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-08 17:33:33,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558570329] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 17:33:33,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:33:33,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 10] total 15 [2024-11-08 17:33:33,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344043912] [2024-11-08 17:33:33,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:33:33,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:33:33,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:33,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:33:33,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-08 17:33:33,768 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 78 [2024-11-08 17:33:33,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 407 flow. Second operand has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 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 17:33:33,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:33,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 78 [2024-11-08 17:33:33,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:33:34,241 INFO L124 PetriNetUnfolderBase]: 1079/2241 cut-off events. [2024-11-08 17:33:34,241 INFO L125 PetriNetUnfolderBase]: For 1575/1618 co-relation queries the response was YES. [2024-11-08 17:33:34,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4895 conditions, 2241 events. 1079/2241 cut-off events. For 1575/1618 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14745 event pairs, 458 based on Foata normal form. 65/1872 useless extension candidates. Maximal degree in co-relation 4674. Up to 919 conditions per place. [2024-11-08 17:33:34,307 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 62 selfloop transitions, 5 changer transitions 0/102 dead transitions. [2024-11-08 17:33:34,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 102 transitions, 606 flow [2024-11-08 17:33:34,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:33:34,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:33:34,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 276 transitions. [2024-11-08 17:33:34,308 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7076923076923077 [2024-11-08 17:33:34,308 INFO L175 Difference]: Start difference. First operand has 85 places, 85 transitions, 407 flow. Second operand 5 states and 276 transitions. [2024-11-08 17:33:34,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 102 transitions, 606 flow [2024-11-08 17:33:34,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 102 transitions, 602 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:33:34,313 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 424 flow [2024-11-08 17:33:34,313 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=424, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2024-11-08 17:33:34,315 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 16 predicate places. [2024-11-08 17:33:34,316 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 424 flow [2024-11-08 17:33:34,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 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 17:33:34,316 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:34,316 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:33:34,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 17:33:34,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:33:34,521 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:33:34,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:34,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1849673419, now seen corresponding path program 1 times [2024-11-08 17:33:34,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:34,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850445567] [2024-11-08 17:33:34,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:34,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:35,108 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:33:35,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:35,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850445567] [2024-11-08 17:33:35,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850445567] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:33:35,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522654173] [2024-11-08 17:33:35,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:35,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:33:35,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:33:35,112 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:33:35,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 17:33:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:35,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 17:33:35,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:33:35,292 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 17:33:35,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:33:35,513 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 17:33:35,524 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 17:33:35,525 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 17:33:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:33:35,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:33:35,930 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 17:33:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:33:36,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522654173] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:33:36,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:33:36,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-11-08 17:33:36,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084531436] [2024-11-08 17:33:36,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:33:36,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-08 17:33:36,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:36,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-08 17:33:36,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2024-11-08 17:33:37,915 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 78 [2024-11-08 17:33:37,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 424 flow. Second operand has 26 states, 26 states have (on average 44.65384615384615) internal successors, (1161), 26 states have internal predecessors, (1161), 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 17:33:37,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:37,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 78 [2024-11-08 17:33:37,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:33:39,685 INFO L124 PetriNetUnfolderBase]: 2557/4774 cut-off events. [2024-11-08 17:33:39,685 INFO L125 PetriNetUnfolderBase]: For 5977/6350 co-relation queries the response was YES. [2024-11-08 17:33:39,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11460 conditions, 4774 events. 2557/4774 cut-off events. For 5977/6350 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 33691 event pairs, 774 based on Foata normal form. 0/4016 useless extension candidates. Maximal degree in co-relation 11237. Up to 1370 conditions per place. [2024-11-08 17:33:39,752 INFO L140 encePairwiseOnDemand]: 67/78 looper letters, 74 selfloop transitions, 23 changer transitions 0/131 dead transitions. [2024-11-08 17:33:39,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 131 transitions, 796 flow [2024-11-08 17:33:39,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 17:33:39,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-08 17:33:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 714 transitions. [2024-11-08 17:33:39,755 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6102564102564103 [2024-11-08 17:33:39,755 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 424 flow. Second operand 15 states and 714 transitions. [2024-11-08 17:33:39,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 131 transitions, 796 flow [2024-11-08 17:33:39,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 131 transitions, 784 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 17:33:39,763 INFO L231 Difference]: Finished difference. Result has 102 places, 88 transitions, 482 flow [2024-11-08 17:33:39,763 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=482, PETRI_PLACES=102, PETRI_TRANSITIONS=88} [2024-11-08 17:33:39,765 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 30 predicate places. [2024-11-08 17:33:39,765 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 88 transitions, 482 flow [2024-11-08 17:33:39,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 44.65384615384615) internal successors, (1161), 26 states have internal predecessors, (1161), 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 17:33:39,767 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:39,767 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:33:39,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 17:33:39,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 17:33:39,972 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:33:39,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:39,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1918971953, now seen corresponding path program 1 times [2024-11-08 17:33:39,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:39,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888906489] [2024-11-08 17:33:39,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:39,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:40,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-11-08 17:33:40,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:40,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888906489] [2024-11-08 17:33:40,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888906489] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:33:40,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783237737] [2024-11-08 17:33:40,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:40,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:33:40,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:33:40,959 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:33:40,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 17:33:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:41,181 INFO L255 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-08 17:33:41,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:33:41,198 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 17:33:41,202 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 17:33:41,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:33:41,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 17:33:41,378 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-08 17:33:41,379 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 17:33:41,529 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 17:33:41,530 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 17:33:41,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 17:33:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 30 proven. 8 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:33:42,243 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:33:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 35 proven. 3 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:33:43,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783237737] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:33:43,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:33:43,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2024-11-08 17:33:43,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074147689] [2024-11-08 17:33:43,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:33:43,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-08 17:33:43,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:43,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-08 17:33:43,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2024-11-08 17:33:46,114 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 78 [2024-11-08 17:33:46,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 88 transitions, 482 flow. Second operand has 28 states, 28 states have (on average 33.07142857142857) internal successors, (926), 28 states have internal predecessors, (926), 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 17:33:46,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:46,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 78 [2024-11-08 17:33:46,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:33:49,180 INFO L124 PetriNetUnfolderBase]: 5410/10309 cut-off events. [2024-11-08 17:33:49,180 INFO L125 PetriNetUnfolderBase]: For 11262/11805 co-relation queries the response was YES. [2024-11-08 17:33:49,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25711 conditions, 10309 events. 5410/10309 cut-off events. For 11262/11805 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 81861 event pairs, 982 based on Foata normal form. 342/9263 useless extension candidates. Maximal degree in co-relation 25445. Up to 1618 conditions per place. [2024-11-08 17:33:49,335 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 147 selfloop transitions, 21 changer transitions 0/188 dead transitions. [2024-11-08 17:33:49,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 188 transitions, 1196 flow [2024-11-08 17:33:49,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 17:33:49,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-08 17:33:49,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 533 transitions. [2024-11-08 17:33:49,338 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2024-11-08 17:33:49,338 INFO L175 Difference]: Start difference. First operand has 102 places, 88 transitions, 482 flow. Second operand 13 states and 533 transitions. [2024-11-08 17:33:49,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 188 transitions, 1196 flow [2024-11-08 17:33:49,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 188 transitions, 1160 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-11-08 17:33:49,358 INFO L231 Difference]: Finished difference. Result has 107 places, 90 transitions, 520 flow [2024-11-08 17:33:49,358 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=520, PETRI_PLACES=107, PETRI_TRANSITIONS=90} [2024-11-08 17:33:49,359 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 35 predicate places. [2024-11-08 17:33:49,359 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 90 transitions, 520 flow [2024-11-08 17:33:49,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 33.07142857142857) internal successors, (926), 28 states have internal predecessors, (926), 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 17:33:49,360 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:49,360 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:33:49,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 17:33:49,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 17:33:49,561 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:33:49,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:49,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1505300262, now seen corresponding path program 1 times [2024-11-08 17:33:49,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:49,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353705870] [2024-11-08 17:33:49,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:49,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-08 17:33:49,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:49,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353705870] [2024-11-08 17:33:49,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353705870] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:33:49,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700392469] [2024-11-08 17:33:49,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:49,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:33:49,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:33:49,927 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:33:49,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 17:33:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:50,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-08 17:33:50,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:33:50,178 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 17:33:50,510 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 17:33:50,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-08 17:33:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:33:50,711 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:33:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-08 17:33:50,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700392469] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 17:33:50,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:33:50,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 10] total 17 [2024-11-08 17:33:50,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829945272] [2024-11-08 17:33:50,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:33:50,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:33:50,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:50,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:33:50,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-11-08 17:33:51,077 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 78 [2024-11-08 17:33:51,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 90 transitions, 520 flow. Second operand has 5 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 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 17:33:51,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:51,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 78 [2024-11-08 17:33:51,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:33:52,515 INFO L124 PetriNetUnfolderBase]: 3162/6259 cut-off events. [2024-11-08 17:33:52,515 INFO L125 PetriNetUnfolderBase]: For 10500/10993 co-relation queries the response was YES. [2024-11-08 17:33:52,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16425 conditions, 6259 events. 3162/6259 cut-off events. For 10500/10993 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 48269 event pairs, 1712 based on Foata normal form. 145/5427 useless extension candidates. Maximal degree in co-relation 16182. Up to 3080 conditions per place. [2024-11-08 17:33:52,615 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 64 selfloop transitions, 5 changer transitions 0/106 dead transitions. [2024-11-08 17:33:52,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 106 transitions, 755 flow [2024-11-08 17:33:52,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:33:52,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:33:52,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 274 transitions. [2024-11-08 17:33:52,617 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7025641025641025 [2024-11-08 17:33:52,617 INFO L175 Difference]: Start difference. First operand has 107 places, 90 transitions, 520 flow. Second operand 5 states and 274 transitions. [2024-11-08 17:33:52,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 106 transitions, 755 flow [2024-11-08 17:33:52,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 106 transitions, 723 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-08 17:33:52,642 INFO L231 Difference]: Finished difference. Result has 106 places, 90 transitions, 512 flow [2024-11-08 17:33:52,642 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=512, PETRI_PLACES=106, PETRI_TRANSITIONS=90} [2024-11-08 17:33:52,643 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 34 predicate places. [2024-11-08 17:33:52,643 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 90 transitions, 512 flow [2024-11-08 17:33:52,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 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 17:33:52,644 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:33:52,644 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:33:52,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 17:33:52,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-08 17:33:52,849 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:33:52,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:33:52,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1834225181, now seen corresponding path program 1 times [2024-11-08 17:33:52,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:33:52,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042748405] [2024-11-08 17:33:52,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:52,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:33:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-08 17:33:54,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:33:54,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042748405] [2024-11-08 17:33:54,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042748405] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:33:54,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813882307] [2024-11-08 17:33:54,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:33:54,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:33:54,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:33:54,144 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:33:54,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 17:33:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:33:54,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-08 17:33:54,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:33:54,365 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 17:33:54,465 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-08 17:33:54,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-08 17:33:54,642 INFO L349 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2024-11-08 17:33:54,643 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 3 case distinctions, treesize of input 17 treesize of output 22 [2024-11-08 17:33:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:33:55,390 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:33:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 35 proven. 3 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:33:56,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813882307] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:33:56,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:33:56,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2024-11-08 17:33:56,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753373903] [2024-11-08 17:33:56,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:33:56,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-08 17:33:56,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:33:56,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-08 17:33:56,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2024-11-08 17:33:59,386 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 78 [2024-11-08 17:33:59,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 90 transitions, 512 flow. Second operand has 31 states, 31 states have (on average 35.58064516129032) internal successors, (1103), 31 states have internal predecessors, (1103), 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 17:33:59,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:33:59,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 78 [2024-11-08 17:33:59,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:03,798 INFO L124 PetriNetUnfolderBase]: 8694/16944 cut-off events. [2024-11-08 17:34:03,798 INFO L125 PetriNetUnfolderBase]: For 25665/26462 co-relation queries the response was YES. [2024-11-08 17:34:03,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43316 conditions, 16944 events. 8694/16944 cut-off events. For 25665/26462 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 149494 event pairs, 1664 based on Foata normal form. 633/15139 useless extension candidates. Maximal degree in co-relation 43037. Up to 2597 conditions per place. [2024-11-08 17:34:04,012 INFO L140 encePairwiseOnDemand]: 67/78 looper letters, 128 selfloop transitions, 31 changer transitions 0/188 dead transitions. [2024-11-08 17:34:04,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 188 transitions, 1313 flow [2024-11-08 17:34:04,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-08 17:34:04,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-08 17:34:04,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 798 transitions. [2024-11-08 17:34:04,017 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5115384615384615 [2024-11-08 17:34:04,017 INFO L175 Difference]: Start difference. First operand has 106 places, 90 transitions, 512 flow. Second operand 20 states and 798 transitions. [2024-11-08 17:34:04,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 188 transitions, 1313 flow [2024-11-08 17:34:04,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 188 transitions, 1287 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 17:34:04,074 INFO L231 Difference]: Finished difference. Result has 126 places, 96 transitions, 627 flow [2024-11-08 17:34:04,075 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=627, PETRI_PLACES=126, PETRI_TRANSITIONS=96} [2024-11-08 17:34:04,075 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 54 predicate places. [2024-11-08 17:34:04,076 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 96 transitions, 627 flow [2024-11-08 17:34:04,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 35.58064516129032) internal successors, (1103), 31 states have internal predecessors, (1103), 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 17:34:04,077 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:04,077 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:34:04,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 17:34:04,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:34:04,278 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:34:04,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:04,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1026406630, now seen corresponding path program 1 times [2024-11-08 17:34:04,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:04,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594411890] [2024-11-08 17:34:04,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:04,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 17:34:05,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:05,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594411890] [2024-11-08 17:34:05,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594411890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:34:05,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315221882] [2024-11-08 17:34:05,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:05,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:34:05,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:34:05,010 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:34:05,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 17:34:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:05,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 17:34:05,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:34:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:34:05,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:34:05,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-08 17:34:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:34:05,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315221882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:34:05,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:34:05,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 25 [2024-11-08 17:34:05,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372003098] [2024-11-08 17:34:05,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:34:05,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-08 17:34:05,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:05,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-08 17:34:05,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2024-11-08 17:34:07,522 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 78 [2024-11-08 17:34:07,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 96 transitions, 627 flow. Second operand has 26 states, 26 states have (on average 39.73076923076923) internal successors, (1033), 26 states have internal predecessors, (1033), 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 17:34:07,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:07,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 78 [2024-11-08 17:34:07,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:11,406 INFO L124 PetriNetUnfolderBase]: 6899/14673 cut-off events. [2024-11-08 17:34:11,406 INFO L125 PetriNetUnfolderBase]: For 25584/26329 co-relation queries the response was YES. [2024-11-08 17:34:11,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39270 conditions, 14673 events. 6899/14673 cut-off events. For 25584/26329 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 131681 event pairs, 1453 based on Foata normal form. 633/12808 useless extension candidates. Maximal degree in co-relation 39114. Up to 2894 conditions per place. [2024-11-08 17:34:11,778 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 141 selfloop transitions, 26 changer transitions 0/193 dead transitions. [2024-11-08 17:34:11,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 193 transitions, 1408 flow [2024-11-08 17:34:11,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 17:34:11,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 17:34:11,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 582 transitions. [2024-11-08 17:34:11,781 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6217948717948718 [2024-11-08 17:34:11,781 INFO L175 Difference]: Start difference. First operand has 126 places, 96 transitions, 627 flow. Second operand 12 states and 582 transitions. [2024-11-08 17:34:11,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 193 transitions, 1408 flow [2024-11-08 17:34:11,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 193 transitions, 1369 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-11-08 17:34:11,860 INFO L231 Difference]: Finished difference. Result has 132 places, 97 transitions, 665 flow [2024-11-08 17:34:11,860 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=665, PETRI_PLACES=132, PETRI_TRANSITIONS=97} [2024-11-08 17:34:11,861 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 60 predicate places. [2024-11-08 17:34:11,861 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 97 transitions, 665 flow [2024-11-08 17:34:11,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 39.73076923076923) internal successors, (1033), 26 states have internal predecessors, (1033), 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 17:34:11,862 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:11,862 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:34:11,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-08 17:34:12,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-08 17:34:12,066 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:34:12,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:12,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1460885602, now seen corresponding path program 1 times [2024-11-08 17:34:12,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:12,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373376119] [2024-11-08 17:34:12,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:12,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 17:34:12,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:12,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373376119] [2024-11-08 17:34:12,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373376119] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:34:12,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613767818] [2024-11-08 17:34:12,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:12,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:34:12,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:34:12,527 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:34:12,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 17:34:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:12,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 17:34:12,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:34:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:34:13,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:34:13,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-08 17:34:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:34:13,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613767818] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:34:13,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:34:13,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 25 [2024-11-08 17:34:13,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361309124] [2024-11-08 17:34:13,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:34:13,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-08 17:34:13,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:13,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-08 17:34:13,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2024-11-08 17:34:15,123 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 78 [2024-11-08 17:34:15,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 97 transitions, 665 flow. Second operand has 26 states, 26 states have (on average 39.96153846153846) internal successors, (1039), 26 states have internal predecessors, (1039), 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 17:34:15,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:15,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 78 [2024-11-08 17:34:15,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:20,610 INFO L124 PetriNetUnfolderBase]: 10759/22862 cut-off events. [2024-11-08 17:34:20,611 INFO L125 PetriNetUnfolderBase]: For 51863/53493 co-relation queries the response was YES. [2024-11-08 17:34:20,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63397 conditions, 22862 events. 10759/22862 cut-off events. For 51863/53493 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 221687 event pairs, 2903 based on Foata normal form. 966/20098 useless extension candidates. Maximal degree in co-relation 63234. Up to 4959 conditions per place. [2024-11-08 17:34:20,880 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 148 selfloop transitions, 26 changer transitions 0/200 dead transitions. [2024-11-08 17:34:20,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 200 transitions, 1671 flow [2024-11-08 17:34:20,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 17:34:20,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 17:34:20,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 574 transitions. [2024-11-08 17:34:20,882 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6132478632478633 [2024-11-08 17:34:20,882 INFO L175 Difference]: Start difference. First operand has 132 places, 97 transitions, 665 flow. Second operand 12 states and 574 transitions. [2024-11-08 17:34:20,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 200 transitions, 1671 flow [2024-11-08 17:34:20,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 200 transitions, 1579 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-11-08 17:34:20,961 INFO L231 Difference]: Finished difference. Result has 136 places, 100 transitions, 697 flow [2024-11-08 17:34:20,961 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=697, PETRI_PLACES=136, PETRI_TRANSITIONS=100} [2024-11-08 17:34:20,962 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 64 predicate places. [2024-11-08 17:34:20,962 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 100 transitions, 697 flow [2024-11-08 17:34:20,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 39.96153846153846) internal successors, (1039), 26 states have internal predecessors, (1039), 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 17:34:20,963 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:20,963 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:34:20,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-08 17:34:21,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 17:34:21,164 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:34:21,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:21,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1329849550, now seen corresponding path program 1 times [2024-11-08 17:34:21,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:21,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671815186] [2024-11-08 17:34:21,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:21,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:34:22,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:22,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671815186] [2024-11-08 17:34:22,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671815186] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:34:22,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298396447] [2024-11-08 17:34:22,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:22,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:34:22,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:34:22,105 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:34:22,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 17:34:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:22,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-08 17:34:22,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:34:22,364 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 17:34:22,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:34:22,620 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 17:34:22,629 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 17:34:22,630 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 17:34:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:34:22,915 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:34:23,443 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 17:34:24,062 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:34:24,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298396447] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:34:24,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:34:24,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-11-08 17:34:24,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577501114] [2024-11-08 17:34:24,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:34:24,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-08 17:34:24,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:24,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-08 17:34:24,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2024-11-08 17:34:27,154 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 78 [2024-11-08 17:34:27,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 100 transitions, 697 flow. Second operand has 32 states, 32 states have (on average 44.96875) internal successors, (1439), 32 states have internal predecessors, (1439), 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 17:34:27,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:27,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 78 [2024-11-08 17:34:27,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:33,845 INFO L124 PetriNetUnfolderBase]: 12717/25897 cut-off events. [2024-11-08 17:34:33,845 INFO L125 PetriNetUnfolderBase]: For 65405/67127 co-relation queries the response was YES. [2024-11-08 17:34:34,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76284 conditions, 25897 events. 12717/25897 cut-off events. For 65405/67127 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 245913 event pairs, 2425 based on Foata normal form. 798/22740 useless extension candidates. Maximal degree in co-relation 76129. Up to 4194 conditions per place. [2024-11-08 17:34:34,185 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 169 selfloop transitions, 27 changer transitions 0/234 dead transitions. [2024-11-08 17:34:34,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 234 transitions, 1886 flow [2024-11-08 17:34:34,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-08 17:34:34,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-08 17:34:34,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 916 transitions. [2024-11-08 17:34:34,188 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6524216524216524 [2024-11-08 17:34:34,188 INFO L175 Difference]: Start difference. First operand has 136 places, 100 transitions, 697 flow. Second operand 18 states and 916 transitions. [2024-11-08 17:34:34,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 234 transitions, 1886 flow [2024-11-08 17:34:34,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 234 transitions, 1834 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-08 17:34:34,332 INFO L231 Difference]: Finished difference. Result has 149 places, 102 transitions, 741 flow [2024-11-08 17:34:34,333 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=741, PETRI_PLACES=149, PETRI_TRANSITIONS=102} [2024-11-08 17:34:34,333 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 77 predicate places. [2024-11-08 17:34:34,333 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 102 transitions, 741 flow [2024-11-08 17:34:34,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 44.96875) internal successors, (1439), 32 states have internal predecessors, (1439), 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 17:34:34,335 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:34,335 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:34:34,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-08 17:34:34,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:34:34,540 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:34:34,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:34,540 INFO L85 PathProgramCache]: Analyzing trace with hash 340315173, now seen corresponding path program 1 times [2024-11-08 17:34:34,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:34,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144180651] [2024-11-08 17:34:34,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:34,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:34:35,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:35,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144180651] [2024-11-08 17:34:35,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144180651] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:34:35,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579927691] [2024-11-08 17:34:35,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:35,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:34:35,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:34:35,434 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:34:35,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 17:34:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:35,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-08 17:34:35,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:34:35,715 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 17:34:35,724 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 17:34:35,869 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 17:34:35,870 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 17:34:35,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 17:34:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:34:36,594 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:34:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:34:37,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579927691] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:34:37,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:34:37,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-11-08 17:34:37,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017866780] [2024-11-08 17:34:37,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:34:37,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-08 17:34:37,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:37,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-08 17:34:37,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2024-11-08 17:34:40,033 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 78 [2024-11-08 17:34:40,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 102 transitions, 741 flow. Second operand has 31 states, 31 states have (on average 41.61290322580645) internal successors, (1290), 31 states have internal predecessors, (1290), 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 17:34:40,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:40,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 78 [2024-11-08 17:34:40,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:48,823 INFO L124 PetriNetUnfolderBase]: 19608/35380 cut-off events. [2024-11-08 17:34:48,823 INFO L125 PetriNetUnfolderBase]: For 110165/113197 co-relation queries the response was YES. [2024-11-08 17:34:49,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110819 conditions, 35380 events. 19608/35380 cut-off events. For 110165/113197 co-relation queries the response was YES. Maximal size of possible extension queue 962. Compared 315700 event pairs, 3459 based on Foata normal form. 1146/31392 useless extension candidates. Maximal degree in co-relation 110661. Up to 5627 conditions per place. [2024-11-08 17:34:49,469 INFO L140 encePairwiseOnDemand]: 67/78 looper letters, 159 selfloop transitions, 28 changer transitions 0/223 dead transitions. [2024-11-08 17:34:49,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 223 transitions, 2011 flow [2024-11-08 17:34:49,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-08 17:34:49,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-08 17:34:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 829 transitions. [2024-11-08 17:34:49,472 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5904558404558404 [2024-11-08 17:34:49,472 INFO L175 Difference]: Start difference. First operand has 149 places, 102 transitions, 741 flow. Second operand 18 states and 829 transitions. [2024-11-08 17:34:49,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 223 transitions, 2011 flow [2024-11-08 17:34:49,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 223 transitions, 1935 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-11-08 17:34:49,683 INFO L231 Difference]: Finished difference. Result has 156 places, 103 transitions, 777 flow [2024-11-08 17:34:49,684 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=777, PETRI_PLACES=156, PETRI_TRANSITIONS=103} [2024-11-08 17:34:49,684 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 84 predicate places. [2024-11-08 17:34:49,684 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 103 transitions, 777 flow [2024-11-08 17:34:49,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 41.61290322580645) internal successors, (1290), 31 states have internal predecessors, (1290), 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 17:34:49,685 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:34:49,686 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 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 17:34:49,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-08 17:34:49,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:34:49,891 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:34:49,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:34:49,891 INFO L85 PathProgramCache]: Analyzing trace with hash 597817364, now seen corresponding path program 1 times [2024-11-08 17:34:49,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:34:49,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424486250] [2024-11-08 17:34:49,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:34:49,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:34:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:34:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-08 17:34:50,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:34:50,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424486250] [2024-11-08 17:34:50,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424486250] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:34:50,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:34:50,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 17:34:50,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83587289] [2024-11-08 17:34:50,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:34:50,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:34:50,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:34:50,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:34:50,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:34:50,120 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 78 [2024-11-08 17:34:50,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 103 transitions, 777 flow. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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 17:34:50,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:34:50,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 78 [2024-11-08 17:34:50,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:34:59,228 INFO L124 PetriNetUnfolderBase]: 27116/42498 cut-off events. [2024-11-08 17:34:59,228 INFO L125 PetriNetUnfolderBase]: For 169275/173929 co-relation queries the response was YES. [2024-11-08 17:34:59,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152689 conditions, 42498 events. 27116/42498 cut-off events. For 169275/173929 co-relation queries the response was YES. Maximal size of possible extension queue 1178. Compared 342535 event pairs, 19787 based on Foata normal form. 30/37285 useless extension candidates. Maximal degree in co-relation 152527. Up to 31888 conditions per place. [2024-11-08 17:34:59,839 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 108 selfloop transitions, 4 changer transitions 1/149 dead transitions. [2024-11-08 17:34:59,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 149 transitions, 1334 flow [2024-11-08 17:34:59,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:34:59,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:34:59,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 237 transitions. [2024-11-08 17:34:59,840 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7596153846153846 [2024-11-08 17:34:59,840 INFO L175 Difference]: Start difference. First operand has 156 places, 103 transitions, 777 flow. Second operand 4 states and 237 transitions. [2024-11-08 17:34:59,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 149 transitions, 1334 flow [2024-11-08 17:35:00,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 149 transitions, 1256 flow, removed 3 selfloop flow, removed 16 redundant places. [2024-11-08 17:35:00,098 INFO L231 Difference]: Finished difference. Result has 145 places, 105 transitions, 747 flow [2024-11-08 17:35:00,098 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=747, PETRI_PLACES=145, PETRI_TRANSITIONS=105} [2024-11-08 17:35:00,098 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 73 predicate places. [2024-11-08 17:35:00,099 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 105 transitions, 747 flow [2024-11-08 17:35:00,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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 17:35:00,099 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:35:00,099 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:35:00,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-08 17:35:00,099 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 17:35:00,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:35:00,100 INFO L85 PathProgramCache]: Analyzing trace with hash 941352601, now seen corresponding path program 2 times [2024-11-08 17:35:00,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:35:00,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352296342] [2024-11-08 17:35:00,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:35:00,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:35:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:35:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-08 17:35:01,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:35:01,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352296342] [2024-11-08 17:35:01,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352296342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:35:01,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898846342] [2024-11-08 17:35:01,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:35:01,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:35:01,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:35:01,690 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:35:01,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6421a7ca-e68c-4bc4-87f4-37dfd164796a/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 17:35:01,943 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:35:01,943 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:35:01,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-08 17:35:01,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:35:01,955 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 17:35:02,067 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-08 17:35:02,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-08 17:35:02,283 INFO L349 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2024-11-08 17:35:02,284 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 3 case distinctions, treesize of input 17 treesize of output 22 [2024-11-08 17:35:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:35:03,404 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:35:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 35 proven. 36 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:35:04,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898846342] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:35:04,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:35:04,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2024-11-08 17:35:04,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016689510] [2024-11-08 17:35:04,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:35:04,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-08 17:35:04,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:35:04,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-08 17:35:04,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1219, Unknown=0, NotChecked=0, Total=1560 [2024-11-08 17:35:07,973 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 78 [2024-11-08 17:35:07,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 105 transitions, 747 flow. Second operand has 40 states, 40 states have (on average 35.3) internal successors, (1412), 40 states have internal predecessors, (1412), 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 17:35:07,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:35:07,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 78 [2024-11-08 17:35:07,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand