./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult.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_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/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_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/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_037bab84-1481-48fe-aa10-c3de15024e45/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 e5124dd4a5a155d8a4e322a35428820633f9eccdd993e14120e650d1ba1fbebe --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 18:36:38,240 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 18:36:38,329 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 18:36:38,334 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 18:36:38,334 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 18:36:38,357 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 18:36:38,358 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 18:36:38,358 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 18:36:38,359 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 18:36:38,360 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 18:36:38,360 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 18:36:38,361 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 18:36:38,362 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 18:36:38,364 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 18:36:38,365 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 18:36:38,365 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 18:36:38,366 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 18:36:38,366 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 18:36:38,367 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 18:36:38,367 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 18:36:38,367 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 18:36:38,372 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 18:36:38,372 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 18:36:38,372 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 18:36:38,373 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 18:36:38,373 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 18:36:38,373 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 18:36:38,373 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 18:36:38,374 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 18:36:38,374 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 18:36:38,374 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 18:36:38,374 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 18:36:38,375 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 18:36:38,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:36:38,375 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 18:36:38,376 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 18:36:38,379 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 18:36:38,379 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 18:36:38,379 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 18:36:38,379 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 18:36:38,380 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 18:36:38,380 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 18:36:38,380 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_037bab84-1481-48fe-aa10-c3de15024e45/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5124dd4a5a155d8a4e322a35428820633f9eccdd993e14120e650d1ba1fbebe [2024-11-08 18:36:38,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 18:36:38,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 18:36:38,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 18:36:38,741 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 18:36:38,741 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 18:36:38,743 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c Unable to find full path for "g++" [2024-11-08 18:36:40,866 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 18:36:41,061 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 18:36:41,062 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2024-11-08 18:36:41,072 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/data/82aeb8e14/88dc03de388e4ad4a1e5edbf3ca6560d/FLAG20ae7d016 [2024-11-08 18:36:41,436 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/data/82aeb8e14/88dc03de388e4ad4a1e5edbf3ca6560d [2024-11-08 18:36:41,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 18:36:41,441 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 18:36:41,442 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 18:36:41,442 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 18:36:41,448 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 18:36:41,449 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:36:41" (1/1) ... [2024-11-08 18:36:41,450 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@360f5b40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:36:41, skipping insertion in model container [2024-11-08 18:36:41,451 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:36:41" (1/1) ... [2024-11-08 18:36:41,490 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 18:36:41,812 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 18:36:41,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:36:41,828 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 18:36:41,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:36:41,891 INFO L204 MainTranslator]: Completed translation [2024-11-08 18:36:41,892 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:36:41 WrapperNode [2024-11-08 18:36:41,892 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 18:36:41,894 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 18:36:41,894 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 18:36:41,894 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 18:36:41,901 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:36:41" (1/1) ... [2024-11-08 18:36:41,910 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:36:41" (1/1) ... [2024-11-08 18:36:41,946 INFO L138 Inliner]: procedures = 26, calls = 61, calls flagged for inlining = 19, calls inlined = 23, statements flattened = 292 [2024-11-08 18:36:41,947 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 18:36:41,948 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 18:36:41,948 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 18:36:41,948 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 18:36:41,963 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:36:41" (1/1) ... [2024-11-08 18:36:41,963 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:36:41" (1/1) ... [2024-11-08 18:36:41,967 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:36:41" (1/1) ... [2024-11-08 18:36:41,987 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-08 18:36:41,987 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:36:41" (1/1) ... [2024-11-08 18:36:41,987 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:36:41" (1/1) ... [2024-11-08 18:36:41,998 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:36:41" (1/1) ... [2024-11-08 18:36:42,003 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:36:41" (1/1) ... [2024-11-08 18:36:42,005 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:36:41" (1/1) ... [2024-11-08 18:36:42,007 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:36:41" (1/1) ... [2024-11-08 18:36:42,011 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 18:36:42,012 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 18:36:42,012 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 18:36:42,012 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 18:36:42,013 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:36:41" (1/1) ... [2024-11-08 18:36:42,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:36:42,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:36:42,056 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 18:36:42,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 18:36:42,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 18:36:42,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 18:36:42,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 18:36:42,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 18:36:42,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 18:36:42,090 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 18:36:42,090 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 18:36:42,090 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 18:36:42,090 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 18:36:42,090 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-08 18:36:42,090 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-08 18:36:42,090 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-08 18:36:42,091 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-08 18:36:42,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 18:36:42,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 18:36:42,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-08 18:36:42,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-08 18:36:42,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 18:36:42,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 18:36:42,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 18:36:42,093 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 18:36:42,227 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 18:36:42,230 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 18:36:42,801 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 18:36:42,801 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 18:36:43,372 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 18:36:43,374 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 18:36:43,375 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:36:43 BoogieIcfgContainer [2024-11-08 18:36:43,375 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 18:36:43,377 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 18:36:43,379 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 18:36:43,383 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 18:36:43,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 06:36:41" (1/3) ... [2024-11-08 18:36:43,384 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9291791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:36:43, skipping insertion in model container [2024-11-08 18:36:43,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:36:41" (2/3) ... [2024-11-08 18:36:43,385 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9291791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:36:43, skipping insertion in model container [2024-11-08 18:36:43,386 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:36:43" (3/3) ... [2024-11-08 18:36:43,388 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult.wvr.c [2024-11-08 18:36:43,410 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 18:36:43,410 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-08 18:36:43,411 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 18:36:43,510 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-08 18:36:43,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 196 flow [2024-11-08 18:36:43,624 INFO L124 PetriNetUnfolderBase]: 12/80 cut-off events. [2024-11-08 18:36:43,625 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-08 18:36:43,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 80 events. 12/80 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 197 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2024-11-08 18:36:43,631 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 196 flow [2024-11-08 18:36:43,637 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 79 transitions, 182 flow [2024-11-08 18:36:43,653 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 18:36:43,663 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;@6aa3098c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 18:36:43,663 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-08 18:36:43,669 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 18:36:43,669 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-11-08 18:36:43,670 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 18:36:43,670 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:36:43,671 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:36:43,671 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 18:36:43,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:36:43,679 INFO L85 PathProgramCache]: Analyzing trace with hash 26403913, now seen corresponding path program 1 times [2024-11-08 18:36:43,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:36:43,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895383789] [2024-11-08 18:36:43,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:36:43,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:36:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:36:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:36:44,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:36:44,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895383789] [2024-11-08 18:36:44,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895383789] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:36:44,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:36:44,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 18:36:44,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013829318] [2024-11-08 18:36:44,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:36:44,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:36:44,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:36:44,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:36:44,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:36:44,131 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 84 [2024-11-08 18:36:44,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 79 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:36:44,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:36:44,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 84 [2024-11-08 18:36:44,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:36:46,879 INFO L124 PetriNetUnfolderBase]: 10337/15767 cut-off events. [2024-11-08 18:36:46,880 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2024-11-08 18:36:46,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28301 conditions, 15767 events. 10337/15767 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 1245. Compared 118927 event pairs, 6408 based on Foata normal form. 1/8406 useless extension candidates. Maximal degree in co-relation 26705. Up to 11896 conditions per place. [2024-11-08 18:36:47,129 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 36 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-11-08 18:36:47,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 75 transitions, 250 flow [2024-11-08 18:36:47,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:36:47,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:36:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2024-11-08 18:36:47,148 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6626984126984127 [2024-11-08 18:36:47,151 INFO L175 Difference]: Start difference. First operand has 80 places, 79 transitions, 182 flow. Second operand 3 states and 167 transitions. [2024-11-08 18:36:47,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 75 transitions, 250 flow [2024-11-08 18:36:47,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 75 transitions, 234 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-08 18:36:47,225 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 162 flow [2024-11-08 18:36:47,227 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2024-11-08 18:36:47,231 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -10 predicate places. [2024-11-08 18:36:47,232 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 162 flow [2024-11-08 18:36:47,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:36:47,232 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:36:47,232 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:36:47,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 18:36:47,233 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 18:36:47,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:36:47,234 INFO L85 PathProgramCache]: Analyzing trace with hash 26403914, now seen corresponding path program 1 times [2024-11-08 18:36:47,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:36:47,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349797811] [2024-11-08 18:36:47,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:36:47,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:36:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:36:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:36:47,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:36:47,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349797811] [2024-11-08 18:36:47,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349797811] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:36:47,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:36:47,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:36:47,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556628119] [2024-11-08 18:36:47,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:36:47,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:36:47,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:36:47,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:36:47,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:36:47,883 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2024-11-08 18:36:47,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:36:47,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:36:47,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2024-11-08 18:36:47,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:36:50,008 INFO L124 PetriNetUnfolderBase]: 10338/15772 cut-off events. [2024-11-08 18:36:50,008 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-08 18:36:50,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27914 conditions, 15772 events. 10338/15772 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 1245. Compared 119062 event pairs, 6408 based on Foata normal form. 0/8405 useless extension candidates. Maximal degree in co-relation 27869. Up to 11911 conditions per place. [2024-11-08 18:36:50,144 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 47 selfloop transitions, 4 changer transitions 0/80 dead transitions. [2024-11-08 18:36:50,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 80 transitions, 274 flow [2024-11-08 18:36:50,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:36:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:36:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 197 transitions. [2024-11-08 18:36:50,147 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2024-11-08 18:36:50,147 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 162 flow. Second operand 4 states and 197 transitions. [2024-11-08 18:36:50,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 80 transitions, 274 flow [2024-11-08 18:36:50,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 80 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:36:50,150 INFO L231 Difference]: Finished difference. Result has 73 places, 78 transitions, 187 flow [2024-11-08 18:36:50,150 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=187, PETRI_PLACES=73, PETRI_TRANSITIONS=78} [2024-11-08 18:36:50,151 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -7 predicate places. [2024-11-08 18:36:50,151 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 78 transitions, 187 flow [2024-11-08 18:36:50,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:36:50,151 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:36:50,152 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 18:36:50,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 18:36:50,152 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 18:36:50,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:36:50,153 INFO L85 PathProgramCache]: Analyzing trace with hash -397349291, now seen corresponding path program 1 times [2024-11-08 18:36:50,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:36:50,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901576483] [2024-11-08 18:36:50,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:36:50,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:36:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:36:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:36:50,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:36:50,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901576483] [2024-11-08 18:36:50,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901576483] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:36:50,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:36:50,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:36:50,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717653202] [2024-11-08 18:36:50,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:36:50,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 18:36:50,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:36:50,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 18:36:50,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-08 18:36:50,483 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2024-11-08 18:36:50,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 78 transitions, 187 flow. Second operand has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:36:50,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:36:50,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2024-11-08 18:36:50,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:36:52,754 INFO L124 PetriNetUnfolderBase]: 10340/15779 cut-off events. [2024-11-08 18:36:52,755 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-08 18:36:52,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27940 conditions, 15779 events. 10340/15779 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 1245. Compared 118824 event pairs, 6408 based on Foata normal form. 0/8413 useless extension candidates. Maximal degree in co-relation 27906. Up to 11911 conditions per place. [2024-11-08 18:36:52,932 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 50 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2024-11-08 18:36:52,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 87 transitions, 321 flow [2024-11-08 18:36:52,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:36:52,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:36:52,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 239 transitions. [2024-11-08 18:36:52,938 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2024-11-08 18:36:52,939 INFO L175 Difference]: Start difference. First operand has 73 places, 78 transitions, 187 flow. Second operand 5 states and 239 transitions. [2024-11-08 18:36:52,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 87 transitions, 321 flow [2024-11-08 18:36:52,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 87 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:36:52,944 INFO L231 Difference]: Finished difference. Result has 78 places, 82 transitions, 226 flow [2024-11-08 18:36:52,945 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=78, PETRI_TRANSITIONS=82} [2024-11-08 18:36:52,946 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -2 predicate places. [2024-11-08 18:36:52,947 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 82 transitions, 226 flow [2024-11-08 18:36:52,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:36:52,948 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:36:52,948 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-08 18:36:52,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 18:36:52,949 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 18:36:52,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:36:52,950 INFO L85 PathProgramCache]: Analyzing trace with hash 620859833, now seen corresponding path program 1 times [2024-11-08 18:36:52,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:36:52,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149075228] [2024-11-08 18:36:52,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:36:52,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:36:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:36:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:36:53,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:36:53,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149075228] [2024-11-08 18:36:53,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149075228] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:36:53,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543116978] [2024-11-08 18:36:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:36:53,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:36:53,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:36:53,399 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:36:53,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 18:36:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:36:53,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 18:36:53,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:36:53,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 18:36:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:36:53,962 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:36:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:36:54,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543116978] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:36:54,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:36:54,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-08 18:36:54,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794698261] [2024-11-08 18:36:54,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:36:54,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 18:36:54,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:36:54,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 18:36:54,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-08 18:36:54,287 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2024-11-08 18:36:54,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 82 transitions, 226 flow. Second operand has 12 states, 12 states have (on average 37.75) internal successors, (453), 12 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:36:54,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:36:54,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2024-11-08 18:36:54,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:36:56,776 INFO L124 PetriNetUnfolderBase]: 10339/15777 cut-off events. [2024-11-08 18:36:56,776 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-08 18:36:56,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27952 conditions, 15777 events. 10339/15777 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 1245. Compared 118725 event pairs, 6408 based on Foata normal form. 1/8415 useless extension candidates. Maximal degree in co-relation 27918. Up to 11907 conditions per place. [2024-11-08 18:36:56,927 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 41 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2024-11-08 18:36:56,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 82 transitions, 328 flow [2024-11-08 18:36:56,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 18:36:56,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 18:36:56,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 303 transitions. [2024-11-08 18:36:56,929 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5153061224489796 [2024-11-08 18:36:56,930 INFO L175 Difference]: Start difference. First operand has 78 places, 82 transitions, 226 flow. Second operand 7 states and 303 transitions. [2024-11-08 18:36:56,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 82 transitions, 328 flow [2024-11-08 18:36:56,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 82 transitions, 327 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:36:56,936 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 241 flow [2024-11-08 18:36:56,937 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=241, PETRI_PLACES=82, PETRI_TRANSITIONS=80} [2024-11-08 18:36:56,939 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 2 predicate places. [2024-11-08 18:36:56,939 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 241 flow [2024-11-08 18:36:56,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 37.75) internal successors, (453), 12 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:36:56,940 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:36:56,940 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-08 18:36:56,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 18:36:57,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:36:57,142 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 18:36:57,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:36:57,142 INFO L85 PathProgramCache]: Analyzing trace with hash -502030234, now seen corresponding path program 1 times [2024-11-08 18:36:57,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:36:57,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699962742] [2024-11-08 18:36:57,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:36:57,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:36:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:36:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:36:57,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:36:57,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699962742] [2024-11-08 18:36:57,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699962742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:36:57,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041595554] [2024-11-08 18:36:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:36:57,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:36:57,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:36:57,546 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:36:57,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 18:36:57,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:36:57,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 18:36:57,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:36:57,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 18:36:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:36:57,993 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:36:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:36:58,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041595554] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:36:58,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:36:58,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-08 18:36:58,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33485687] [2024-11-08 18:36:58,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:36:58,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 18:36:58,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:36:58,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 18:36:58,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-08 18:36:58,456 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2024-11-08 18:36:58,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 241 flow. Second operand has 14 states, 14 states have (on average 37.785714285714285) internal successors, (529), 14 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:36:58,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:36:58,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2024-11-08 18:36:58,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:37:00,543 INFO L124 PetriNetUnfolderBase]: 10338/15775 cut-off events. [2024-11-08 18:37:00,543 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2024-11-08 18:37:00,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27960 conditions, 15775 events. 10338/15775 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 1245. Compared 118957 event pairs, 6408 based on Foata normal form. 1/8416 useless extension candidates. Maximal degree in co-relation 27921. Up to 11897 conditions per place. [2024-11-08 18:37:00,719 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 41 selfloop transitions, 13 changer transitions 0/83 dead transitions. [2024-11-08 18:37:00,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 355 flow [2024-11-08 18:37:00,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 18:37:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 18:37:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 308 transitions. [2024-11-08 18:37:00,722 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-11-08 18:37:00,722 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 241 flow. Second operand 7 states and 308 transitions. [2024-11-08 18:37:00,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 355 flow [2024-11-08 18:37:00,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 83 transitions, 324 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-08 18:37:00,727 INFO L231 Difference]: Finished difference. Result has 82 places, 79 transitions, 240 flow [2024-11-08 18:37:00,727 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=82, PETRI_TRANSITIONS=79} [2024-11-08 18:37:00,728 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 2 predicate places. [2024-11-08 18:37:00,729 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 79 transitions, 240 flow [2024-11-08 18:37:00,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 37.785714285714285) internal successors, (529), 14 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:37:00,730 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:37:00,730 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:37:00,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 18:37:00,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:37:00,931 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 18:37:00,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:37:00,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1626315918, now seen corresponding path program 1 times [2024-11-08 18:37:00,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:37:00,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614540693] [2024-11-08 18:37:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:37:00,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:37:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:37:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:37:01,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:37:01,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614540693] [2024-11-08 18:37:01,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614540693] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:37:01,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:37:01,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:37:01,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305131568] [2024-11-08 18:37:01,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:37:01,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:37:01,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:37:01,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:37:01,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:37:01,119 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 84 [2024-11-08 18:37:01,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 79 transitions, 240 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:37:01,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:37:01,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 84 [2024-11-08 18:37:01,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:37:02,666 INFO L124 PetriNetUnfolderBase]: 11390/17221 cut-off events. [2024-11-08 18:37:02,666 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2024-11-08 18:37:02,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30883 conditions, 17221 events. 11390/17221 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 1260. Compared 129500 event pairs, 7188 based on Foata normal form. 297/9982 useless extension candidates. Maximal degree in co-relation 30831. Up to 11910 conditions per place. [2024-11-08 18:37:02,817 INFO L140 encePairwiseOnDemand]: 73/84 looper letters, 76 selfloop transitions, 6 changer transitions 0/115 dead transitions. [2024-11-08 18:37:02,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 115 transitions, 510 flow [2024-11-08 18:37:02,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:37:02,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:37:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 284 transitions. [2024-11-08 18:37:02,819 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2024-11-08 18:37:02,819 INFO L175 Difference]: Start difference. First operand has 82 places, 79 transitions, 240 flow. Second operand 5 states and 284 transitions. [2024-11-08 18:37:02,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 115 transitions, 510 flow [2024-11-08 18:37:02,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 115 transitions, 465 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-11-08 18:37:02,823 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 264 flow [2024-11-08 18:37:02,823 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2024-11-08 18:37:02,824 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 3 predicate places. [2024-11-08 18:37:02,825 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 264 flow [2024-11-08 18:37:02,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:37:02,825 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:37:02,825 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:37:02,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 18:37:02,826 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 18:37:02,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:37:02,826 INFO L85 PathProgramCache]: Analyzing trace with hash 195663914, now seen corresponding path program 1 times [2024-11-08 18:37:02,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:37:02,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290458238] [2024-11-08 18:37:02,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:37:02,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:37:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:37:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:37:02,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:37:02,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290458238] [2024-11-08 18:37:02,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290458238] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:37:02,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:37:02,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:37:02,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014431588] [2024-11-08 18:37:02,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:37:02,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:37:02,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:37:02,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:37:02,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:37:02,931 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 84 [2024-11-08 18:37:02,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 264 flow. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:37:02,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:37:02,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 84 [2024-11-08 18:37:02,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:37:04,344 INFO L124 PetriNetUnfolderBase]: 7886/12889 cut-off events. [2024-11-08 18:37:04,345 INFO L125 PetriNetUnfolderBase]: For 895/895 co-relation queries the response was YES. [2024-11-08 18:37:04,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24723 conditions, 12889 events. 7886/12889 cut-off events. For 895/895 co-relation queries the response was YES. Maximal size of possible extension queue 862. Compared 101150 event pairs, 4852 based on Foata normal form. 0/7740 useless extension candidates. Maximal degree in co-relation 24677. Up to 9006 conditions per place. [2024-11-08 18:37:04,488 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 38 selfloop transitions, 6 changer transitions 0/81 dead transitions. [2024-11-08 18:37:04,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 348 flow [2024-11-08 18:37:04,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:37:04,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:37:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 206 transitions. [2024-11-08 18:37:04,490 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-11-08 18:37:04,490 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 264 flow. Second operand 4 states and 206 transitions. [2024-11-08 18:37:04,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 348 flow [2024-11-08 18:37:04,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 81 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:37:04,494 INFO L231 Difference]: Finished difference. Result has 83 places, 81 transitions, 270 flow [2024-11-08 18:37:04,494 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=270, PETRI_PLACES=83, PETRI_TRANSITIONS=81} [2024-11-08 18:37:04,495 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 3 predicate places. [2024-11-08 18:37:04,495 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 81 transitions, 270 flow [2024-11-08 18:37:04,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:37:04,496 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:37:04,496 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:37:04,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 18:37:04,496 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 18:37:04,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:37:04,497 INFO L85 PathProgramCache]: Analyzing trace with hash 195663915, now seen corresponding path program 1 times [2024-11-08 18:37:04,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:37:04,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895906466] [2024-11-08 18:37:04,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:37:04,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:37:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:37:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:37:04,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:37:04,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895906466] [2024-11-08 18:37:04,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895906466] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:37:04,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:37:04,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:37:04,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029392129] [2024-11-08 18:37:04,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:37:04,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:37:04,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:37:04,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:37:04,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:37:04,636 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 84 [2024-11-08 18:37:04,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 81 transitions, 270 flow. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:37:04,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:37:04,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 84 [2024-11-08 18:37:04,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:37:06,290 INFO L124 PetriNetUnfolderBase]: 9262/15440 cut-off events. [2024-11-08 18:37:06,290 INFO L125 PetriNetUnfolderBase]: For 1097/1097 co-relation queries the response was YES. [2024-11-08 18:37:06,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29736 conditions, 15440 events. 9262/15440 cut-off events. For 1097/1097 co-relation queries the response was YES. Maximal size of possible extension queue 973. Compared 126330 event pairs, 5813 based on Foata normal form. 270/9668 useless extension candidates. Maximal degree in co-relation 29686. Up to 9018 conditions per place. [2024-11-08 18:37:06,404 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 64 selfloop transitions, 10 changer transitions 0/107 dead transitions. [2024-11-08 18:37:06,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 107 transitions, 490 flow [2024-11-08 18:37:06,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:37:06,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:37:06,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 271 transitions. [2024-11-08 18:37:06,406 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6452380952380953 [2024-11-08 18:37:06,406 INFO L175 Difference]: Start difference. First operand has 83 places, 81 transitions, 270 flow. Second operand 5 states and 271 transitions. [2024-11-08 18:37:06,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 107 transitions, 490 flow [2024-11-08 18:37:06,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 107 transitions, 483 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:37:06,414 INFO L231 Difference]: Finished difference. Result has 87 places, 82 transitions, 305 flow [2024-11-08 18:37:06,414 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=305, PETRI_PLACES=87, PETRI_TRANSITIONS=82} [2024-11-08 18:37:06,415 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 7 predicate places. [2024-11-08 18:37:06,415 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 82 transitions, 305 flow [2024-11-08 18:37:06,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:37:06,416 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:37:06,416 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:37:06,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 18:37:06,416 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 18:37:06,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:37:06,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1538704447, now seen corresponding path program 1 times [2024-11-08 18:37:06,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:37:06,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998251168] [2024-11-08 18:37:06,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:37:06,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:37:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:37:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:37:06,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:37:06,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998251168] [2024-11-08 18:37:06,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998251168] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:37:06,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:37:06,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:37:06,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109386832] [2024-11-08 18:37:06,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:37:06,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:37:06,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:37:06,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:37:06,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:37:06,558 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 84 [2024-11-08 18:37:06,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 82 transitions, 305 flow. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:37:06,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:37:06,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 84 [2024-11-08 18:37:06,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:37:07,846 INFO L124 PetriNetUnfolderBase]: 6407/10995 cut-off events. [2024-11-08 18:37:07,846 INFO L125 PetriNetUnfolderBase]: For 1735/1735 co-relation queries the response was YES. [2024-11-08 18:37:07,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22188 conditions, 10995 events. 6407/10995 cut-off events. For 1735/1735 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 88489 event pairs, 4040 based on Foata normal form. 0/7167 useless extension candidates. Maximal degree in co-relation 22132. Up to 7468 conditions per place. [2024-11-08 18:37:07,957 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 34 selfloop transitions, 8 changer transitions 0/80 dead transitions. [2024-11-08 18:37:07,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 80 transitions, 381 flow [2024-11-08 18:37:07,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:37:07,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:37:07,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 246 transitions. [2024-11-08 18:37:07,959 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-11-08 18:37:07,959 INFO L175 Difference]: Start difference. First operand has 87 places, 82 transitions, 305 flow. Second operand 5 states and 246 transitions. [2024-11-08 18:37:07,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 80 transitions, 381 flow [2024-11-08 18:37:07,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 80 transitions, 371 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-08 18:37:07,966 INFO L231 Difference]: Finished difference. Result has 87 places, 80 transitions, 303 flow [2024-11-08 18:37:07,966 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=303, PETRI_PLACES=87, PETRI_TRANSITIONS=80} [2024-11-08 18:37:07,967 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 7 predicate places. [2024-11-08 18:37:07,967 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 80 transitions, 303 flow [2024-11-08 18:37:07,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:37:07,967 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:37:07,968 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:37:07,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-08 18:37:07,968 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 18:37:07,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:37:07,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1538704448, now seen corresponding path program 1 times [2024-11-08 18:37:07,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:37:07,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468266444] [2024-11-08 18:37:07,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:37:07,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:37:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:37:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:37:08,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:37:08,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468266444] [2024-11-08 18:37:08,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468266444] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:37:08,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664697515] [2024-11-08 18:37:08,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:37:08,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:37:08,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:37:08,384 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:37:08,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 18:37:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:37:08,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-08 18:37:08,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:37:08,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:37:08,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:37:08,623 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 18 treesize of output 13 [2024-11-08 18:37:08,642 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:37:08,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 18:37:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:37:08,693 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:37:08,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664697515] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:37:08,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 18:37:08,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2024-11-08 18:37:08,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151733995] [2024-11-08 18:37:08,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:37:08,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 18:37:08,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:37:08,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 18:37:08,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-08 18:37:08,750 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 84 [2024-11-08 18:37:08,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 80 transitions, 303 flow. Second operand has 6 states, 6 states have (on average 39.5) internal successors, (237), 6 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:37:08,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:37:08,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 84 [2024-11-08 18:37:08,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:37:09,619 INFO L124 PetriNetUnfolderBase]: 4133/7395 cut-off events. [2024-11-08 18:37:09,619 INFO L125 PetriNetUnfolderBase]: For 1301/1301 co-relation queries the response was YES. [2024-11-08 18:37:09,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14362 conditions, 7395 events. 4133/7395 cut-off events. For 1301/1301 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 57936 event pairs, 2627 based on Foata normal form. 0/5263 useless extension candidates. Maximal degree in co-relation 11173. Up to 4884 conditions per place. [2024-11-08 18:37:09,681 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 42 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2024-11-08 18:37:09,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 78 transitions, 385 flow [2024-11-08 18:37:09,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:37:09,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:37:09,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 189 transitions. [2024-11-08 18:37:09,683 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-08 18:37:09,683 INFO L175 Difference]: Start difference. First operand has 87 places, 80 transitions, 303 flow. Second operand 4 states and 189 transitions. [2024-11-08 18:37:09,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 78 transitions, 385 flow [2024-11-08 18:37:09,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 78 transitions, 374 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:37:09,688 INFO L231 Difference]: Finished difference. Result has 85 places, 78 transitions, 290 flow [2024-11-08 18:37:09,688 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=290, PETRI_PLACES=85, PETRI_TRANSITIONS=78} [2024-11-08 18:37:09,689 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 5 predicate places. [2024-11-08 18:37:09,689 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 78 transitions, 290 flow [2024-11-08 18:37:09,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.5) internal successors, (237), 6 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:37:09,689 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:37:09,690 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:37:09,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-08 18:37:09,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-08 18:37:09,894 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 18:37:09,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:37:09,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1791926522, now seen corresponding path program 1 times [2024-11-08 18:37:09,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:37:09,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124907129] [2024-11-08 18:37:09,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:37:09,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:37:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:37:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:37:10,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:37:10,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124907129] [2024-11-08 18:37:10,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124907129] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:37:10,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568529095] [2024-11-08 18:37:10,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:37:10,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:37:10,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:37:10,174 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:37:10,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 18:37:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:37:10,287 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 18:37:10,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:37:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:37:10,450 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:37:10,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568529095] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:37:10,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 18:37:10,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-08 18:37:10,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700720797] [2024-11-08 18:37:10,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:37:10,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 18:37:10,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:37:10,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 18:37:10,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-08 18:37:10,511 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 84 [2024-11-08 18:37:10,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 78 transitions, 290 flow. Second operand has 6 states, 6 states have (on average 41.833333333333336) internal successors, (251), 6 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:37:10,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:37:10,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 84 [2024-11-08 18:37:10,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:37:11,332 INFO L124 PetriNetUnfolderBase]: 2790/5287 cut-off events. [2024-11-08 18:37:11,332 INFO L125 PetriNetUnfolderBase]: For 990/990 co-relation queries the response was YES. [2024-11-08 18:37:11,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9783 conditions, 5287 events. 2790/5287 cut-off events. For 990/990 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 41097 event pairs, 1773 based on Foata normal form. 0/4020 useless extension candidates. Maximal degree in co-relation 7607. Up to 3294 conditions per place. [2024-11-08 18:37:11,375 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 33 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2024-11-08 18:37:11,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 76 transitions, 368 flow [2024-11-08 18:37:11,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:37:11,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:37:11,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 235 transitions. [2024-11-08 18:37:11,377 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-11-08 18:37:11,377 INFO L175 Difference]: Start difference. First operand has 85 places, 78 transitions, 290 flow. Second operand 5 states and 235 transitions. [2024-11-08 18:37:11,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 76 transitions, 368 flow [2024-11-08 18:37:11,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 76 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:37:11,381 INFO L231 Difference]: Finished difference. Result has 85 places, 76 transitions, 298 flow [2024-11-08 18:37:11,382 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=298, PETRI_PLACES=85, PETRI_TRANSITIONS=76} [2024-11-08 18:37:11,382 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 5 predicate places. [2024-11-08 18:37:11,382 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 76 transitions, 298 flow [2024-11-08 18:37:11,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.833333333333336) internal successors, (251), 6 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:37:11,383 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:37:11,383 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:37:11,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 18:37:11,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_037bab84-1481-48fe-aa10-c3de15024e45/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-08 18:37:11,586 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 18:37:11,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:37:11,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1142361249, now seen corresponding path program 1 times [2024-11-08 18:37:11,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:37:11,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110779284] [2024-11-08 18:37:11,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:37:11,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:37:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:37:11,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:37:11,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:37:11,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110779284] [2024-11-08 18:37:11,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110779284] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:37:11,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:37:11,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:37:11,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421829272] [2024-11-08 18:37:11,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:37:11,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:37:11,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:37:11,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:37:11,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:37:11,668 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 84 [2024-11-08 18:37:11,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 76 transitions, 298 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:37:11,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:37:11,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 84 [2024-11-08 18:37:11,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:37:12,689 INFO L124 PetriNetUnfolderBase]: 4234/7745 cut-off events. [2024-11-08 18:37:12,690 INFO L125 PetriNetUnfolderBase]: For 1558/1558 co-relation queries the response was YES. [2024-11-08 18:37:12,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14423 conditions, 7745 events. 4234/7745 cut-off events. For 1558/1558 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 59592 event pairs, 1008 based on Foata normal form. 4/6193 useless extension candidates. Maximal degree in co-relation 11621. Up to 2879 conditions per place. [2024-11-08 18:37:12,792 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 49 selfloop transitions, 3 changer transitions 3/93 dead transitions. [2024-11-08 18:37:12,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 93 transitions, 455 flow [2024-11-08 18:37:12,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:37:12,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:37:12,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2024-11-08 18:37:12,794 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2024-11-08 18:37:12,794 INFO L175 Difference]: Start difference. First operand has 85 places, 76 transitions, 298 flow. Second operand 3 states and 180 transitions. [2024-11-08 18:37:12,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 93 transitions, 455 flow [2024-11-08 18:37:12,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 93 transitions, 440 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:37:12,800 INFO L231 Difference]: Finished difference. Result has 85 places, 76 transitions, 278 flow [2024-11-08 18:37:12,800 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=85, PETRI_TRANSITIONS=76} [2024-11-08 18:37:12,801 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 5 predicate places. [2024-11-08 18:37:12,801 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 76 transitions, 278 flow [2024-11-08 18:37:12,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:37:12,801 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:37:12,802 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:37:12,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-08 18:37:12,802 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 18:37:12,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:37:12,803 INFO L85 PathProgramCache]: Analyzing trace with hash -365492756, now seen corresponding path program 1 times [2024-11-08 18:37:12,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:37:12,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631208491] [2024-11-08 18:37:12,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:37:12,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:37:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:37:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:37:12,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:37:12,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631208491] [2024-11-08 18:37:12,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631208491] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:37:12,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:37:12,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:37:12,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483293728] [2024-11-08 18:37:12,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:37:12,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:37:12,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:37:12,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:37:12,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:37:13,004 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 84 [2024-11-08 18:37:13,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 76 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:37:13,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:37:13,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 84 [2024-11-08 18:37:13,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:37:14,018 INFO L124 PetriNetUnfolderBase]: 3956/6900 cut-off events. [2024-11-08 18:37:14,018 INFO L125 PetriNetUnfolderBase]: For 3204/3204 co-relation queries the response was YES. [2024-11-08 18:37:14,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14417 conditions, 6900 events. 3956/6900 cut-off events. For 3204/3204 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 50830 event pairs, 1125 based on Foata normal form. 35/5654 useless extension candidates. Maximal degree in co-relation 12139. Up to 2858 conditions per place. [2024-11-08 18:37:14,082 INFO L140 encePairwiseOnDemand]: 81/84 looper letters, 55 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2024-11-08 18:37:14,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 95 transitions, 451 flow [2024-11-08 18:37:14,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:37:14,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:37:14,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 181 transitions. [2024-11-08 18:37:14,084 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7182539682539683 [2024-11-08 18:37:14,084 INFO L175 Difference]: Start difference. First operand has 85 places, 76 transitions, 278 flow. Second operand 3 states and 181 transitions. [2024-11-08 18:37:14,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 95 transitions, 451 flow [2024-11-08 18:37:14,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 95 transitions, 447 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:37:14,091 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 291 flow [2024-11-08 18:37:14,091 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=291, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2024-11-08 18:37:14,092 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 7 predicate places. [2024-11-08 18:37:14,092 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 291 flow [2024-11-08 18:37:14,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:37:14,092 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:37:14,092 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:37:14,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-08 18:37:14,093 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 18:37:14,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:37:14,093 INFO L85 PathProgramCache]: Analyzing trace with hash -427278898, now seen corresponding path program 1 times [2024-11-08 18:37:14,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:37:14,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899226153] [2024-11-08 18:37:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:37:14,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:37:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:37:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:37:14,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:37:14,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899226153] [2024-11-08 18:37:14,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899226153] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:37:14,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:37:14,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:37:14,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525556927] [2024-11-08 18:37:14,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:37:14,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:37:14,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:37:14,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:37:14,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:37:14,221 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 84 [2024-11-08 18:37:14,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 291 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:37:14,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:37:14,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 84 [2024-11-08 18:37:14,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:37:15,046 INFO L124 PetriNetUnfolderBase]: 3858/6944 cut-off events. [2024-11-08 18:37:15,046 INFO L125 PetriNetUnfolderBase]: For 4510/4510 co-relation queries the response was YES. [2024-11-08 18:37:15,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14789 conditions, 6944 events. 3858/6944 cut-off events. For 4510/4510 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 52345 event pairs, 1182 based on Foata normal form. 98/5855 useless extension candidates. Maximal degree in co-relation 12394. Up to 3055 conditions per place. [2024-11-08 18:37:15,106 INFO L140 encePairwiseOnDemand]: 81/84 looper letters, 59 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2024-11-08 18:37:15,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 99 transitions, 489 flow [2024-11-08 18:37:15,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:37:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:37:15,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2024-11-08 18:37:15,107 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7261904761904762 [2024-11-08 18:37:15,107 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 291 flow. Second operand 3 states and 183 transitions. [2024-11-08 18:37:15,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 99 transitions, 489 flow [2024-11-08 18:37:15,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 99 transitions, 474 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-08 18:37:15,111 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 299 flow [2024-11-08 18:37:15,112 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=299, PETRI_PLACES=89, PETRI_TRANSITIONS=78} [2024-11-08 18:37:15,112 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 9 predicate places. [2024-11-08 18:37:15,112 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 299 flow [2024-11-08 18:37:15,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:37:15,112 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:37:15,113 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:37:15,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-08 18:37:15,113 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 18:37:15,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:37:15,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1541315894, now seen corresponding path program 1 times [2024-11-08 18:37:15,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:37:15,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88301180] [2024-11-08 18:37:15,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:37:15,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:37:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:37:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 18:37:15,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:37:15,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88301180] [2024-11-08 18:37:15,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88301180] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:37:15,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:37:15,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 18:37:15,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829078992] [2024-11-08 18:37:15,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:37:15,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 18:37:15,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:37:15,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 18:37:15,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 18:37:15,740 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2024-11-08 18:37:15,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 78 transitions, 299 flow. Second operand has 6 states, 6 states have (on average 41.166666666666664) internal successors, (247), 6 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 18:37:15,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:37:15,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2024-11-08 18:37:15,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:37:18,420 INFO L124 PetriNetUnfolderBase]: 16893/25442 cut-off events. [2024-11-08 18:37:18,420 INFO L125 PetriNetUnfolderBase]: For 13241/13259 co-relation queries the response was YES. [2024-11-08 18:37:18,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56791 conditions, 25442 events. 16893/25442 cut-off events. For 13241/13259 co-relation queries the response was YES. Maximal size of possible extension queue 1189. Compared 180329 event pairs, 1467 based on Foata normal form. 96/24066 useless extension candidates. Maximal degree in co-relation 47320. Up to 16147 conditions per place. [2024-11-08 18:37:18,645 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 113 selfloop transitions, 9 changer transitions 2/154 dead transitions. [2024-11-08 18:37:18,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 154 transitions, 771 flow [2024-11-08 18:37:18,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:37:18,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:37:18,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 327 transitions. [2024-11-08 18:37:18,647 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6488095238095238 [2024-11-08 18:37:18,647 INFO L175 Difference]: Start difference. First operand has 89 places, 78 transitions, 299 flow. Second operand 6 states and 327 transitions. [2024-11-08 18:37:18,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 154 transitions, 771 flow [2024-11-08 18:37:18,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 154 transitions, 758 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-08 18:37:18,660 INFO L231 Difference]: Finished difference. Result has 97 places, 86 transitions, 352 flow [2024-11-08 18:37:18,660 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=352, PETRI_PLACES=97, PETRI_TRANSITIONS=86} [2024-11-08 18:37:18,661 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 17 predicate places. [2024-11-08 18:37:18,661 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 86 transitions, 352 flow [2024-11-08 18:37:18,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.166666666666664) internal successors, (247), 6 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 18:37:18,662 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:37:18,662 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:37:18,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-08 18:37:18,662 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 18:37:18,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:37:18,663 INFO L85 PathProgramCache]: Analyzing trace with hash 862062154, now seen corresponding path program 2 times [2024-11-08 18:37:18,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:37:18,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644554096] [2024-11-08 18:37:18,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:37:18,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:37:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:37:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 18:37:19,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:37:19,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644554096] [2024-11-08 18:37:19,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644554096] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:37:19,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:37:19,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 18:37:19,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997348297] [2024-11-08 18:37:19,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:37:19,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 18:37:19,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:37:19,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 18:37:19,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-08 18:37:19,344 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 84 [2024-11-08 18:37:19,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 86 transitions, 352 flow. Second operand has 7 states, 7 states have (on average 38.57142857142857) internal successors, (270), 7 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:37:19,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:37:19,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 84 [2024-11-08 18:37:19,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand