./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya --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 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:21:26,185 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:21:26,249 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 02:21:26,253 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:21:26,254 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:21:26,279 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:21:26,280 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:21:26,280 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:21:26,281 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:21:26,281 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:21:26,282 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:21:26,282 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:21:26,283 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:21:26,284 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:21:26,284 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:21:26,285 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:21:26,285 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:21:26,286 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:21:26,286 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:21:26,287 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:21:26,287 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 02:21:26,288 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 02:21:26,288 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 02:21:26,288 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:21:26,289 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 02:21:26,289 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 02:21:26,290 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:21:26,290 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:21:26,291 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:21:26,291 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:21:26,291 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:21:26,292 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:21:26,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:21:26,293 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:21:26,293 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:21:26,293 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:21:26,294 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:21:26,294 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:21:26,294 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:21:26,294 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:21:26,295 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:21:26,295 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_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd [2023-11-29 02:21:26,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:21:26,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:21:26,558 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:21:26,559 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:21:26,559 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:21:26,561 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-11-29 02:21:29,394 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:21:29,546 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:21:29,547 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-11-29 02:21:29,554 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/data/c0e522dce/01df1911aa044c02a5ccbd4068f5e29a/FLAG6446b46a2 [2023-11-29 02:21:29,566 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/data/c0e522dce/01df1911aa044c02a5ccbd4068f5e29a [2023-11-29 02:21:29,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:21:29,570 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:21:29,571 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:21:29,572 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:21:29,577 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:21:29,578 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:21:29" (1/1) ... [2023-11-29 02:21:29,579 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40610bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:21:29, skipping insertion in model container [2023-11-29 02:21:29,579 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:21:29" (1/1) ... [2023-11-29 02:21:29,599 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:21:29,746 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:21:29,756 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:21:29,776 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:21:29,784 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:21:29,784 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:21:29,790 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:21:29,790 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:21:29 WrapperNode [2023-11-29 02:21:29,791 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:21:29,791 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:21:29,792 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:21:29,792 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:21:29,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:21:29" (1/1) ... [2023-11-29 02:21:29,804 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:21:29" (1/1) ... [2023-11-29 02:21:29,822 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 58 [2023-11-29 02:21:29,823 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:21:29,824 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:21:29,824 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:21:29,824 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:21:29,832 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:21:29" (1/1) ... [2023-11-29 02:21:29,832 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:21:29" (1/1) ... [2023-11-29 02:21:29,834 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:21:29" (1/1) ... [2023-11-29 02:21:29,848 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-29 02:21:29,848 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:21:29" (1/1) ... [2023-11-29 02:21:29,849 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:21:29" (1/1) ... [2023-11-29 02:21:29,854 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:21:29" (1/1) ... [2023-11-29 02:21:29,858 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:21:29" (1/1) ... [2023-11-29 02:21:29,859 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:21:29" (1/1) ... [2023-11-29 02:21:29,861 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:21:29" (1/1) ... [2023-11-29 02:21:29,863 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:21:29,864 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:21:29,864 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:21:29,865 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:21:29,865 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:21:29" (1/1) ... [2023-11-29 02:21:29,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:21:29,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:21:29,890 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:21:29,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:21:29,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:21:29,932 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 02:21:29,933 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 02:21:29,933 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 02:21:29,933 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 02:21:29,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:21:29,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:21:29,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 02:21:29,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:21:29,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:21:29,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:21:29,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 02:21:29,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 02:21:29,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 02:21:29,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:21:29,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:21:29,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:21:29,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:21:29,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 02:21:29,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:21:29,937 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 02:21:30,036 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:21:30,038 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:21:30,220 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:21:30,353 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:21:30,353 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 02:21:30,354 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:21:30 BoogieIcfgContainer [2023-11-29 02:21:30,354 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:21:30,372 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:21:30,373 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:21:30,376 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:21:30,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:21:29" (1/3) ... [2023-11-29 02:21:30,377 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f76a3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:21:30, skipping insertion in model container [2023-11-29 02:21:30,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:21:29" (2/3) ... [2023-11-29 02:21:30,378 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f76a3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:21:30, skipping insertion in model container [2023-11-29 02:21:30,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:21:30" (3/3) ... [2023-11-29 02:21:30,379 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2023-11-29 02:21:30,409 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:21:30,409 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-29 02:21:30,409 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 02:21:30,457 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 02:21:30,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 36 transitions, 86 flow [2023-11-29 02:21:30,524 INFO L124 PetriNetUnfolderBase]: 2/34 cut-off events. [2023-11-29 02:21:30,525 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 02:21:30,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 34 events. 2/34 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 51 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2023-11-29 02:21:30,528 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 36 transitions, 86 flow [2023-11-29 02:21:30,532 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 33 transitions, 78 flow [2023-11-29 02:21:30,543 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:21:30,551 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@7d10b7c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:21:30,552 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-29 02:21:30,555 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:21:30,556 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 02:21:30,556 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:21:30,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:21:30,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 02:21:30,557 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:21:30,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:30,564 INFO L85 PathProgramCache]: Analyzing trace with hash 8522, now seen corresponding path program 1 times [2023-11-29 02:21:30,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:30,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301767298] [2023-11-29 02:21:30,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:30,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:30,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:30,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301767298] [2023-11-29 02:21:30,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301767298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:21:30,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:21:30,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:21:30,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709430445] [2023-11-29 02:21:30,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:21:30,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:21:30,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:30,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:21:30,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:21:30,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2023-11-29 02:21:30,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2023-11-29 02:21:30,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:21:30,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2023-11-29 02:21:30,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:21:31,000 INFO L124 PetriNetUnfolderBase]: 55/126 cut-off events. [2023-11-29 02:21:31,001 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-29 02:21:31,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 126 events. 55/126 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 343 event pairs, 34 based on Foata normal form. 1/112 useless extension candidates. Maximal degree in co-relation 191. Up to 95 conditions per place. [2023-11-29 02:21:31,005 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 15 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-11-29 02:21:31,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 102 flow [2023-11-29 02:21:31,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:21:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:21:31,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2023-11-29 02:21:31,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6203703703703703 [2023-11-29 02:21:31,021 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 67 transitions. [2023-11-29 02:21:31,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 67 transitions. [2023-11-29 02:21:31,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:21:31,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 67 transitions. [2023-11-29 02:21:31,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:21:31,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-29 02:21:31,033 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-29 02:21:31,035 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 78 flow. Second operand 3 states and 67 transitions. [2023-11-29 02:21:31,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 102 flow [2023-11-29 02:21:31,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 02:21:31,041 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 64 flow [2023-11-29 02:21:31,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-11-29 02:21:31,047 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-11-29 02:21:31,048 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 64 flow [2023-11-29 02:21:31,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2023-11-29 02:21:31,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:21:31,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 02:21:31,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:21:31,049 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:21:31,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:31,050 INFO L85 PathProgramCache]: Analyzing trace with hash 8523, now seen corresponding path program 1 times [2023-11-29 02:21:31,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:31,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98239765] [2023-11-29 02:21:31,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:31,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:31,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:31,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98239765] [2023-11-29 02:21:31,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98239765] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:21:31,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:21:31,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:21:31,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089261775] [2023-11-29 02:21:31,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:21:31,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:21:31,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:31,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:21:31,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:21:31,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-29 02:21:31,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-11-29 02:21:31,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:21:31,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-29 02:21:31,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:21:31,233 INFO L124 PetriNetUnfolderBase]: 37/91 cut-off events. [2023-11-29 02:21:31,233 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2023-11-29 02:21:31,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 91 events. 37/91 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 238 event pairs, 22 based on Foata normal form. 10/92 useless extension candidates. Maximal degree in co-relation 160. Up to 67 conditions per place. [2023-11-29 02:21:31,235 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 13 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-29 02:21:31,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 27 transitions, 88 flow [2023-11-29 02:21:31,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:21:31,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:21:31,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2023-11-29 02:21:31,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2023-11-29 02:21:31,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 70 transitions. [2023-11-29 02:21:31,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 70 transitions. [2023-11-29 02:21:31,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:21:31,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 70 transitions. [2023-11-29 02:21:31,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2023-11-29 02:21:31,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-29 02:21:31,241 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-29 02:21:31,241 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 64 flow. Second operand 3 states and 70 transitions. [2023-11-29 02:21:31,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 27 transitions, 88 flow [2023-11-29 02:21:31,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 87 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:21:31,243 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 61 flow [2023-11-29 02:21:31,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-11-29 02:21:31,245 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -7 predicate places. [2023-11-29 02:21:31,245 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 61 flow [2023-11-29 02:21:31,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-11-29 02:21:31,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:21:31,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:21:31,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:21:31,246 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:21:31,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:31,247 INFO L85 PathProgramCache]: Analyzing trace with hash 254099552, now seen corresponding path program 1 times [2023-11-29 02:21:31,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:31,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345921162] [2023-11-29 02:21:31,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:31,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:31,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:31,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345921162] [2023-11-29 02:21:31,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345921162] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:21:31,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:21:31,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:21:31,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467223855] [2023-11-29 02:21:31,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:21:31,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:21:31,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:31,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:21:31,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:21:31,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2023-11-29 02:21:31,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2023-11-29 02:21:31,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:21:31,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2023-11-29 02:21:31,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:21:31,362 INFO L124 PetriNetUnfolderBase]: 43/98 cut-off events. [2023-11-29 02:21:31,362 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 02:21:31,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 98 events. 43/98 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 233 event pairs, 26 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 179. Up to 79 conditions per place. [2023-11-29 02:21:31,364 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 15 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-11-29 02:21:31,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 89 flow [2023-11-29 02:21:31,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:21:31,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:21:31,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2023-11-29 02:21:31,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2023-11-29 02:21:31,366 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 66 transitions. [2023-11-29 02:21:31,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 66 transitions. [2023-11-29 02:21:31,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:21:31,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 66 transitions. [2023-11-29 02:21:31,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2023-11-29 02:21:31,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-29 02:21:31,369 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-29 02:21:31,369 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 61 flow. Second operand 3 states and 66 transitions. [2023-11-29 02:21:31,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 89 flow [2023-11-29 02:21:31,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 88 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:21:31,371 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 58 flow [2023-11-29 02:21:31,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-11-29 02:21:31,372 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -8 predicate places. [2023-11-29 02:21:31,372 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 58 flow [2023-11-29 02:21:31,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2023-11-29 02:21:31,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:21:31,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:21:31,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:21:31,373 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:21:31,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:31,374 INFO L85 PathProgramCache]: Analyzing trace with hash 254099553, now seen corresponding path program 1 times [2023-11-29 02:21:31,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:31,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705548374] [2023-11-29 02:21:31,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:31,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:31,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:31,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705548374] [2023-11-29 02:21:31,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705548374] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:21:31,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:21:31,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:21:31,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813596799] [2023-11-29 02:21:31,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:21:31,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:21:31,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:31,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:21:31,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:21:31,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-29 02:21:31,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2023-11-29 02:21:31,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:21:31,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-29 02:21:31,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:21:31,512 INFO L124 PetriNetUnfolderBase]: 37/85 cut-off events. [2023-11-29 02:21:31,512 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2023-11-29 02:21:31,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 85 events. 37/85 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 203 event pairs, 22 based on Foata normal form. 5/87 useless extension candidates. Maximal degree in co-relation 154. Up to 67 conditions per place. [2023-11-29 02:21:31,514 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 13 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-11-29 02:21:31,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 82 flow [2023-11-29 02:21:31,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:21:31,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:21:31,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2023-11-29 02:21:31,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2023-11-29 02:21:31,516 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 70 transitions. [2023-11-29 02:21:31,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 70 transitions. [2023-11-29 02:21:31,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:21:31,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 70 transitions. [2023-11-29 02:21:31,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2023-11-29 02:21:31,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-29 02:21:31,518 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-29 02:21:31,518 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 58 flow. Second operand 3 states and 70 transitions. [2023-11-29 02:21:31,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 82 flow [2023-11-29 02:21:31,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 23 transitions, 81 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:21:31,519 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 55 flow [2023-11-29 02:21:31,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-11-29 02:21:31,520 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -9 predicate places. [2023-11-29 02:21:31,521 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 55 flow [2023-11-29 02:21:31,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2023-11-29 02:21:31,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:21:31,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:21:31,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 02:21:31,522 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:21:31,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:31,522 INFO L85 PathProgramCache]: Analyzing trace with hash -308859051, now seen corresponding path program 1 times [2023-11-29 02:21:31,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:31,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538462905] [2023-11-29 02:21:31,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:31,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:31,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:31,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538462905] [2023-11-29 02:21:31,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538462905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:21:31,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:21:31,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:21:31,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189558966] [2023-11-29 02:21:31,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:21:31,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:21:31,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:31,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:21:31,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:21:31,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2023-11-29 02:21:31,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 55 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2023-11-29 02:21:31,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:21:31,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2023-11-29 02:21:31,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:21:31,692 INFO L124 PetriNetUnfolderBase]: 73/162 cut-off events. [2023-11-29 02:21:31,692 INFO L125 PetriNetUnfolderBase]: For 5/7 co-relation queries the response was YES. [2023-11-29 02:21:31,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 162 events. 73/162 cut-off events. For 5/7 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 538 event pairs, 22 based on Foata normal form. 1/160 useless extension candidates. Maximal degree in co-relation 298. Up to 74 conditions per place. [2023-11-29 02:21:31,694 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 20 selfloop transitions, 2 changer transitions 3/33 dead transitions. [2023-11-29 02:21:31,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 128 flow [2023-11-29 02:21:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:21:31,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:21:31,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2023-11-29 02:21:31,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7685185185185185 [2023-11-29 02:21:31,696 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 83 transitions. [2023-11-29 02:21:31,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 83 transitions. [2023-11-29 02:21:31,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:21:31,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 83 transitions. [2023-11-29 02:21:31,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2023-11-29 02:21:31,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-29 02:21:31,698 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-29 02:21:31,698 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 55 flow. Second operand 3 states and 83 transitions. [2023-11-29 02:21:31,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 128 flow [2023-11-29 02:21:31,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:21:31,700 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 66 flow [2023-11-29 02:21:31,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-11-29 02:21:31,701 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -7 predicate places. [2023-11-29 02:21:31,701 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 66 flow [2023-11-29 02:21:31,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2023-11-29 02:21:31,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:21:31,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:21:31,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 02:21:31,702 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:21:31,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:31,702 INFO L85 PathProgramCache]: Analyzing trace with hash -457354806, now seen corresponding path program 1 times [2023-11-29 02:21:31,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:31,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161020495] [2023-11-29 02:21:31,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:31,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:31,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:31,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161020495] [2023-11-29 02:21:31,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161020495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:21:31,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:21:31,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:21:31,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392856569] [2023-11-29 02:21:31,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:21:31,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:21:31,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:31,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:21:31,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:21:31,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-29 02:21:31,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2023-11-29 02:21:31,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:21:31,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-29 02:21:31,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:21:31,896 INFO L124 PetriNetUnfolderBase]: 142/274 cut-off events. [2023-11-29 02:21:31,896 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-29 02:21:31,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 554 conditions, 274 events. 142/274 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1002 event pairs, 81 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 543. Up to 179 conditions per place. [2023-11-29 02:21:31,899 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 21 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2023-11-29 02:21:31,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 131 flow [2023-11-29 02:21:31,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:21:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:21:31,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2023-11-29 02:21:31,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6736111111111112 [2023-11-29 02:21:31,901 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 97 transitions. [2023-11-29 02:21:31,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 97 transitions. [2023-11-29 02:21:31,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:21:31,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 97 transitions. [2023-11-29 02:21:31,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2023-11-29 02:21:31,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 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) [2023-11-29 02:21:31,903 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 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) [2023-11-29 02:21:31,903 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 66 flow. Second operand 4 states and 97 transitions. [2023-11-29 02:21:31,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 131 flow [2023-11-29 02:21:31,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:21:31,905 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 78 flow [2023-11-29 02:21:31,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-11-29 02:21:31,906 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-11-29 02:21:31,906 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 78 flow [2023-11-29 02:21:31,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2023-11-29 02:21:31,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:21:31,907 INFO L208 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] [2023-11-29 02:21:31,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 02:21:31,907 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:21:31,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:31,907 INFO L85 PathProgramCache]: Analyzing trace with hash -613517268, now seen corresponding path program 1 times [2023-11-29 02:21:31,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:31,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203910612] [2023-11-29 02:21:31,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:31,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:32,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:32,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203910612] [2023-11-29 02:21:32,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203910612] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:21:32,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867033820] [2023-11-29 02:21:32,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:32,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:32,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:21:32,245 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:21:32,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:21:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:32,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:21:32,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:21:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:32,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:21:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:32,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867033820] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:21:32,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:21:32,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 3] total 10 [2023-11-29 02:21:32,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218374537] [2023-11-29 02:21:32,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:21:32,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 02:21:32,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:32,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 02:21:32,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:21:32,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 02:21:32,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 78 flow. Second operand has 11 states, 11 states have (on average 21.363636363636363) internal successors, (235), 11 states have internal predecessors, (235), 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) [2023-11-29 02:21:32,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:21:32,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 02:21:32,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:21:33,008 INFO L124 PetriNetUnfolderBase]: 428/787 cut-off events. [2023-11-29 02:21:33,009 INFO L125 PetriNetUnfolderBase]: For 203/206 co-relation queries the response was YES. [2023-11-29 02:21:33,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1848 conditions, 787 events. 428/787 cut-off events. For 203/206 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3563 event pairs, 64 based on Foata normal form. 3/719 useless extension candidates. Maximal degree in co-relation 1835. Up to 184 conditions per place. [2023-11-29 02:21:33,016 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 70 selfloop transitions, 16 changer transitions 13/105 dead transitions. [2023-11-29 02:21:33,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 105 transitions, 507 flow [2023-11-29 02:21:33,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:21:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 02:21:33,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 268 transitions. [2023-11-29 02:21:33,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7444444444444445 [2023-11-29 02:21:33,018 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 268 transitions. [2023-11-29 02:21:33,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 268 transitions. [2023-11-29 02:21:33,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:21:33,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 268 transitions. [2023-11-29 02:21:33,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 26.8) internal successors, (268), 10 states have internal predecessors, (268), 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) [2023-11-29 02:21:33,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 36.0) internal successors, (396), 11 states have internal predecessors, (396), 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) [2023-11-29 02:21:33,022 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 36.0) internal successors, (396), 11 states have internal predecessors, (396), 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) [2023-11-29 02:21:33,022 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 78 flow. Second operand 10 states and 268 transitions. [2023-11-29 02:21:33,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 105 transitions, 507 flow [2023-11-29 02:21:33,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 105 transitions, 497 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:21:33,026 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 203 flow [2023-11-29 02:21:33,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=203, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-11-29 02:21:33,027 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2023-11-29 02:21:33,027 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 203 flow [2023-11-29 02:21:33,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.363636363636363) internal successors, (235), 11 states have internal predecessors, (235), 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) [2023-11-29 02:21:33,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:21:33,028 INFO L208 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] [2023-11-29 02:21:33,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:21:33,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 02:21:33,228 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:21:33,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:33,229 INFO L85 PathProgramCache]: Analyzing trace with hash 160704036, now seen corresponding path program 2 times [2023-11-29 02:21:33,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:33,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105153019] [2023-11-29 02:21:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:33,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:33,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:33,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:33,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105153019] [2023-11-29 02:21:33,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105153019] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:21:33,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123258625] [2023-11-29 02:21:33,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:21:33,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:33,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:21:33,403 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:21:33,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:21:33,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:21:33,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:21:33,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:21:33,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:21:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:33,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:21:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:34,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123258625] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:21:34,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:21:34,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 8] total 16 [2023-11-29 02:21:34,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973685245] [2023-11-29 02:21:34,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:21:34,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 02:21:34,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:34,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 02:21:34,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2023-11-29 02:21:34,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 02:21:34,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 203 flow. Second operand has 17 states, 17 states have (on average 19.470588235294116) internal successors, (331), 17 states have internal predecessors, (331), 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) [2023-11-29 02:21:34,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:21:34,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 02:21:34,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:21:34,935 INFO L124 PetriNetUnfolderBase]: 581/1070 cut-off events. [2023-11-29 02:21:34,935 INFO L125 PetriNetUnfolderBase]: For 1139/1139 co-relation queries the response was YES. [2023-11-29 02:21:34,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2972 conditions, 1070 events. 581/1070 cut-off events. For 1139/1139 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5353 event pairs, 2 based on Foata normal form. 24/1014 useless extension candidates. Maximal degree in co-relation 2954. Up to 225 conditions per place. [2023-11-29 02:21:34,944 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 77 selfloop transitions, 88 changer transitions 9/180 dead transitions. [2023-11-29 02:21:34,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 180 transitions, 1263 flow [2023-11-29 02:21:34,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 02:21:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 02:21:34,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 450 transitions. [2023-11-29 02:21:34,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-29 02:21:34,947 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 450 transitions. [2023-11-29 02:21:34,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 450 transitions. [2023-11-29 02:21:34,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:21:34,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 450 transitions. [2023-11-29 02:21:34,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 22.5) internal successors, (450), 20 states have internal predecessors, (450), 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) [2023-11-29 02:21:34,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 36.0) internal successors, (756), 21 states have internal predecessors, (756), 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) [2023-11-29 02:21:34,951 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 36.0) internal successors, (756), 21 states have internal predecessors, (756), 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) [2023-11-29 02:21:34,951 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 203 flow. Second operand 20 states and 450 transitions. [2023-11-29 02:21:34,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 180 transitions, 1263 flow [2023-11-29 02:21:34,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 180 transitions, 1228 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-11-29 02:21:34,962 INFO L231 Difference]: Finished difference. Result has 79 places, 123 transitions, 1079 flow [2023-11-29 02:21:34,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1079, PETRI_PLACES=79, PETRI_TRANSITIONS=123} [2023-11-29 02:21:34,963 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 41 predicate places. [2023-11-29 02:21:34,963 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 123 transitions, 1079 flow [2023-11-29 02:21:34,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.470588235294116) internal successors, (331), 17 states have internal predecessors, (331), 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) [2023-11-29 02:21:34,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:21:34,964 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:21:34,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:21:35,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 02:21:35,167 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:21:35,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:35,167 INFO L85 PathProgramCache]: Analyzing trace with hash 107303959, now seen corresponding path program 3 times [2023-11-29 02:21:35,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:35,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286197084] [2023-11-29 02:21:35,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:35,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:35,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:35,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286197084] [2023-11-29 02:21:35,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286197084] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:21:35,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932514591] [2023-11-29 02:21:35,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:21:35,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:35,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:21:35,476 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:21:35,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:21:35,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:21:35,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:21:35,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:21:35,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:21:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:35,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:21:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:35,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932514591] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:21:35,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:21:35,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2023-11-29 02:21:35,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403247332] [2023-11-29 02:21:35,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:21:35,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 02:21:35,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:35,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 02:21:35,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:21:35,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 02:21:35,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 123 transitions, 1079 flow. Second operand has 16 states, 16 states have (on average 19.6875) internal successors, (315), 16 states have internal predecessors, (315), 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) [2023-11-29 02:21:35,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:21:35,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 02:21:35,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:21:37,264 INFO L124 PetriNetUnfolderBase]: 1143/2036 cut-off events. [2023-11-29 02:21:37,264 INFO L125 PetriNetUnfolderBase]: For 9104/9106 co-relation queries the response was YES. [2023-11-29 02:21:37,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9032 conditions, 2036 events. 1143/2036 cut-off events. For 9104/9106 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11250 event pairs, 24 based on Foata normal form. 35/2071 useless extension candidates. Maximal degree in co-relation 8998. Up to 455 conditions per place. [2023-11-29 02:21:37,293 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 179 selfloop transitions, 220 changer transitions 26/431 dead transitions. [2023-11-29 02:21:37,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 431 transitions, 4401 flow [2023-11-29 02:21:37,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 02:21:37,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 02:21:37,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 671 transitions. [2023-11-29 02:21:37,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64272030651341 [2023-11-29 02:21:37,297 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 671 transitions. [2023-11-29 02:21:37,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 671 transitions. [2023-11-29 02:21:37,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:21:37,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 671 transitions. [2023-11-29 02:21:37,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 23.137931034482758) internal successors, (671), 29 states have internal predecessors, (671), 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) [2023-11-29 02:21:37,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 36.0) internal successors, (1080), 30 states have internal predecessors, (1080), 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) [2023-11-29 02:21:37,304 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 36.0) internal successors, (1080), 30 states have internal predecessors, (1080), 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) [2023-11-29 02:21:37,304 INFO L175 Difference]: Start difference. First operand has 79 places, 123 transitions, 1079 flow. Second operand 29 states and 671 transitions. [2023-11-29 02:21:37,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 431 transitions, 4401 flow [2023-11-29 02:21:37,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 431 transitions, 4195 flow, removed 62 selfloop flow, removed 2 redundant places. [2023-11-29 02:21:37,383 INFO L231 Difference]: Finished difference. Result has 127 places, 319 transitions, 3652 flow [2023-11-29 02:21:37,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3652, PETRI_PLACES=127, PETRI_TRANSITIONS=319} [2023-11-29 02:21:37,384 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 89 predicate places. [2023-11-29 02:21:37,385 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 319 transitions, 3652 flow [2023-11-29 02:21:37,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.6875) internal successors, (315), 16 states have internal predecessors, (315), 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) [2023-11-29 02:21:37,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:21:37,385 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:21:37,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:21:37,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 02:21:37,591 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:21:37,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:37,592 INFO L85 PathProgramCache]: Analyzing trace with hash -53391401, now seen corresponding path program 4 times [2023-11-29 02:21:37,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:37,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357938158] [2023-11-29 02:21:37,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:37,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:37,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:37,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357938158] [2023-11-29 02:21:37,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357938158] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:21:37,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453103461] [2023-11-29 02:21:37,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:21:37,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:37,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:21:37,793 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:21:37,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:21:37,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:21:37,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:21:37,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:21:37,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:21:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:38,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:21:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:38,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453103461] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:21:38,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:21:38,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2023-11-29 02:21:38,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909276611] [2023-11-29 02:21:38,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:21:38,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 02:21:38,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:38,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 02:21:38,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:21:38,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-29 02:21:38,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 319 transitions, 3652 flow. Second operand has 16 states, 16 states have (on average 20.25) internal successors, (324), 16 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:21:38,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:21:38,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-29 02:21:38,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:21:39,030 INFO L124 PetriNetUnfolderBase]: 1351/2407 cut-off events. [2023-11-29 02:21:39,030 INFO L125 PetriNetUnfolderBase]: For 23144/23188 co-relation queries the response was YES. [2023-11-29 02:21:39,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14127 conditions, 2407 events. 1351/2407 cut-off events. For 23144/23188 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13846 event pairs, 116 based on Foata normal form. 14/2413 useless extension candidates. Maximal degree in co-relation 14070. Up to 738 conditions per place. [2023-11-29 02:21:39,063 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 167 selfloop transitions, 271 changer transitions 10/494 dead transitions. [2023-11-29 02:21:39,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 494 transitions, 6630 flow [2023-11-29 02:21:39,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 02:21:39,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 02:21:39,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 375 transitions. [2023-11-29 02:21:39,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6510416666666666 [2023-11-29 02:21:39,066 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 375 transitions. [2023-11-29 02:21:39,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 375 transitions. [2023-11-29 02:21:39,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:21:39,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 375 transitions. [2023-11-29 02:21:39,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 23.4375) internal successors, (375), 16 states have internal predecessors, (375), 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) [2023-11-29 02:21:39,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 36.0) internal successors, (612), 17 states have internal predecessors, (612), 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) [2023-11-29 02:21:39,070 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 36.0) internal successors, (612), 17 states have internal predecessors, (612), 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) [2023-11-29 02:21:39,070 INFO L175 Difference]: Start difference. First operand has 127 places, 319 transitions, 3652 flow. Second operand 16 states and 375 transitions. [2023-11-29 02:21:39,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 494 transitions, 6630 flow [2023-11-29 02:21:39,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 494 transitions, 6375 flow, removed 118 selfloop flow, removed 6 redundant places. [2023-11-29 02:21:39,235 INFO L231 Difference]: Finished difference. Result has 146 places, 438 transitions, 6139 flow [2023-11-29 02:21:39,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=3473, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6139, PETRI_PLACES=146, PETRI_TRANSITIONS=438} [2023-11-29 02:21:39,236 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 108 predicate places. [2023-11-29 02:21:39,236 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 438 transitions, 6139 flow [2023-11-29 02:21:39,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.25) internal successors, (324), 16 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:21:39,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:21:39,237 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:21:39,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:21:39,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:39,438 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:21:39,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:39,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1772542709, now seen corresponding path program 5 times [2023-11-29 02:21:39,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:39,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85527825] [2023-11-29 02:21:39,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:39,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:39,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:39,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85527825] [2023-11-29 02:21:39,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85527825] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:21:39,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115281142] [2023-11-29 02:21:39,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:21:39,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:39,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:21:39,776 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:21:39,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:21:39,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 02:21:39,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:21:39,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:21:39,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:21:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:39,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:21:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:40,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115281142] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:21:40,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:21:40,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 18 [2023-11-29 02:21:40,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900419348] [2023-11-29 02:21:40,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:21:40,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 02:21:40,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:40,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 02:21:40,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:21:40,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-29 02:21:40,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 438 transitions, 6139 flow. Second operand has 18 states, 18 states have (on average 20.22222222222222) internal successors, (364), 18 states have internal predecessors, (364), 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) [2023-11-29 02:21:40,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:21:40,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-29 02:21:40,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:21:41,966 INFO L124 PetriNetUnfolderBase]: 1748/3109 cut-off events. [2023-11-29 02:21:41,966 INFO L125 PetriNetUnfolderBase]: For 45340/45420 co-relation queries the response was YES. [2023-11-29 02:21:41,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20736 conditions, 3109 events. 1748/3109 cut-off events. For 45340/45420 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 18399 event pairs, 25 based on Foata normal form. 71/3180 useless extension candidates. Maximal degree in co-relation 20672. Up to 717 conditions per place. [2023-11-29 02:21:42,012 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 139 selfloop transitions, 582 changer transitions 4/771 dead transitions. [2023-11-29 02:21:42,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 771 transitions, 11904 flow [2023-11-29 02:21:42,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 02:21:42,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-29 02:21:42,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 876 transitions. [2023-11-29 02:21:42,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6403508771929824 [2023-11-29 02:21:42,017 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 876 transitions. [2023-11-29 02:21:42,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 876 transitions. [2023-11-29 02:21:42,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:21:42,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 876 transitions. [2023-11-29 02:21:42,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 23.05263157894737) internal successors, (876), 38 states have internal predecessors, (876), 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) [2023-11-29 02:21:42,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 36.0) internal successors, (1404), 39 states have internal predecessors, (1404), 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) [2023-11-29 02:21:42,026 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 36.0) internal successors, (1404), 39 states have internal predecessors, (1404), 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) [2023-11-29 02:21:42,026 INFO L175 Difference]: Start difference. First operand has 146 places, 438 transitions, 6139 flow. Second operand 38 states and 876 transitions. [2023-11-29 02:21:42,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 771 transitions, 11904 flow [2023-11-29 02:21:42,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 771 transitions, 11662 flow, removed 119 selfloop flow, removed 2 redundant places. [2023-11-29 02:21:42,302 INFO L231 Difference]: Finished difference. Result has 186 places, 676 transitions, 11023 flow [2023-11-29 02:21:42,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=5970, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=11023, PETRI_PLACES=186, PETRI_TRANSITIONS=676} [2023-11-29 02:21:42,303 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 148 predicate places. [2023-11-29 02:21:42,303 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 676 transitions, 11023 flow [2023-11-29 02:21:42,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 20.22222222222222) internal successors, (364), 18 states have internal predecessors, (364), 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) [2023-11-29 02:21:42,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:21:42,304 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:21:42,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:21:42,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:42,504 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:21:42,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:42,505 INFO L85 PathProgramCache]: Analyzing trace with hash 441620359, now seen corresponding path program 6 times [2023-11-29 02:21:42,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:42,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697027627] [2023-11-29 02:21:42,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:42,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:42,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:42,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:42,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697027627] [2023-11-29 02:21:42,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697027627] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:21:42,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416611851] [2023-11-29 02:21:42,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:21:42,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:42,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:21:42,817 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:21:42,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:21:42,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 02:21:42,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:21:42,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:21:42,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:21:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:43,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:21:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:43,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416611851] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:21:43,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:21:43,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-29 02:21:43,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465862419] [2023-11-29 02:21:43,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:21:43,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 02:21:43,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:43,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 02:21:43,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:21:43,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-29 02:21:43,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 676 transitions, 11023 flow. Second operand has 19 states, 19 states have (on average 20.157894736842106) internal successors, (383), 19 states have internal predecessors, (383), 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) [2023-11-29 02:21:43,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:21:43,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-29 02:21:43,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:21:45,737 INFO L124 PetriNetUnfolderBase]: 2242/4024 cut-off events. [2023-11-29 02:21:45,737 INFO L125 PetriNetUnfolderBase]: For 56694/56794 co-relation queries the response was YES. [2023-11-29 02:21:45,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29395 conditions, 4024 events. 2242/4024 cut-off events. For 56694/56794 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 25067 event pairs, 51 based on Foata normal form. 63/4087 useless extension candidates. Maximal degree in co-relation 29326. Up to 887 conditions per place. [2023-11-29 02:21:45,790 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 186 selfloop transitions, 784 changer transitions 3/1019 dead transitions. [2023-11-29 02:21:45,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 1019 transitions, 17818 flow [2023-11-29 02:21:45,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-29 02:21:45,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-29 02:21:45,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 1127 transitions. [2023-11-29 02:21:45,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2023-11-29 02:21:45,793 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 1127 transitions. [2023-11-29 02:21:45,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 1127 transitions. [2023-11-29 02:21:45,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:21:45,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 1127 transitions. [2023-11-29 02:21:45,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 23.0) internal successors, (1127), 49 states have internal predecessors, (1127), 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) [2023-11-29 02:21:45,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 36.0) internal successors, (1800), 50 states have internal predecessors, (1800), 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) [2023-11-29 02:21:45,800 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 36.0) internal successors, (1800), 50 states have internal predecessors, (1800), 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) [2023-11-29 02:21:45,800 INFO L175 Difference]: Start difference. First operand has 186 places, 676 transitions, 11023 flow. Second operand 49 states and 1127 transitions. [2023-11-29 02:21:45,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 1019 transitions, 17818 flow [2023-11-29 02:21:46,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 1019 transitions, 16874 flow, removed 457 selfloop flow, removed 1 redundant places. [2023-11-29 02:21:46,277 INFO L231 Difference]: Finished difference. Result has 254 places, 906 transitions, 16595 flow [2023-11-29 02:21:46,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=10330, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=563, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=16595, PETRI_PLACES=254, PETRI_TRANSITIONS=906} [2023-11-29 02:21:46,279 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 216 predicate places. [2023-11-29 02:21:46,279 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 906 transitions, 16595 flow [2023-11-29 02:21:46,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.157894736842106) internal successors, (383), 19 states have internal predecessors, (383), 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) [2023-11-29 02:21:46,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:21:46,279 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:21:46,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 02:21:46,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:46,480 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:21:46,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:46,481 INFO L85 PathProgramCache]: Analyzing trace with hash 264814453, now seen corresponding path program 7 times [2023-11-29 02:21:46,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:46,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338537800] [2023-11-29 02:21:46,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:46,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:46,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:46,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338537800] [2023-11-29 02:21:46,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338537800] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:21:46,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491721055] [2023-11-29 02:21:46,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:21:46,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:46,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:21:46,676 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:21:46,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:21:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:46,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:21:46,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:21:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:46,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:21:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:47,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491721055] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:21:47,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:21:47,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2023-11-29 02:21:47,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557808658] [2023-11-29 02:21:47,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:21:47,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:21:47,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:47,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:21:47,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:21:47,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-29 02:21:47,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 906 transitions, 16595 flow. Second operand has 15 states, 15 states have (on average 20.333333333333332) internal successors, (305), 15 states have internal predecessors, (305), 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) [2023-11-29 02:21:47,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:21:47,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-29 02:21:47,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:21:49,265 INFO L124 PetriNetUnfolderBase]: 2619/4696 cut-off events. [2023-11-29 02:21:49,265 INFO L125 PetriNetUnfolderBase]: For 57727/57785 co-relation queries the response was YES. [2023-11-29 02:21:49,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37084 conditions, 4696 events. 2619/4696 cut-off events. For 57727/57785 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 30232 event pairs, 107 based on Foata normal form. 30/4726 useless extension candidates. Maximal degree in co-relation 36995. Up to 1018 conditions per place. [2023-11-29 02:21:49,323 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 297 selfloop transitions, 764 changer transitions 1/1108 dead transitions. [2023-11-29 02:21:49,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 1108 transitions, 22089 flow [2023-11-29 02:21:49,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 02:21:49,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 02:21:49,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 496 transitions. [2023-11-29 02:21:49,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.656084656084656 [2023-11-29 02:21:49,325 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 496 transitions. [2023-11-29 02:21:49,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 496 transitions. [2023-11-29 02:21:49,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:21:49,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 496 transitions. [2023-11-29 02:21:49,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 23.61904761904762) internal successors, (496), 21 states have internal predecessors, (496), 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) [2023-11-29 02:21:49,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 36.0) internal successors, (792), 22 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:21:49,328 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 36.0) internal successors, (792), 22 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:21:49,328 INFO L175 Difference]: Start difference. First operand has 254 places, 906 transitions, 16595 flow. Second operand 21 states and 496 transitions. [2023-11-29 02:21:49,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 1108 transitions, 22089 flow [2023-11-29 02:21:50,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 1108 transitions, 21595 flow, removed 113 selfloop flow, removed 12 redundant places. [2023-11-29 02:21:50,052 INFO L231 Difference]: Finished difference. Result has 270 places, 1051 transitions, 21642 flow [2023-11-29 02:21:50,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=16091, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=623, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=21642, PETRI_PLACES=270, PETRI_TRANSITIONS=1051} [2023-11-29 02:21:50,053 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 232 predicate places. [2023-11-29 02:21:50,053 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 1051 transitions, 21642 flow [2023-11-29 02:21:50,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.333333333333332) internal successors, (305), 15 states have internal predecessors, (305), 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) [2023-11-29 02:21:50,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:21:50,054 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:21:50,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:21:50,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:50,255 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:21:50,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:50,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1301747213, now seen corresponding path program 8 times [2023-11-29 02:21:50,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:50,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895644765] [2023-11-29 02:21:50,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:50,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:50,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:50,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895644765] [2023-11-29 02:21:50,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895644765] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:21:50,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594517541] [2023-11-29 02:21:50,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:21:50,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:50,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:21:50,484 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:21:50,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:21:50,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:21:50,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:21:50,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:21:50,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:21:50,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:50,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:21:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:50,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594517541] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:21:50,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:21:50,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-29 02:21:50,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128084351] [2023-11-29 02:21:50,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:21:50,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 02:21:50,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:50,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 02:21:50,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2023-11-29 02:21:50,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-29 02:21:50,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 1051 transitions, 21642 flow. Second operand has 17 states, 17 states have (on average 20.176470588235293) internal successors, (343), 17 states have internal predecessors, (343), 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) [2023-11-29 02:21:50,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:21:50,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-29 02:21:50,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:21:53,554 INFO L124 PetriNetUnfolderBase]: 3058/5466 cut-off events. [2023-11-29 02:21:53,554 INFO L125 PetriNetUnfolderBase]: For 90943/90980 co-relation queries the response was YES. [2023-11-29 02:21:53,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47931 conditions, 5466 events. 3058/5466 cut-off events. For 90943/90980 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 36301 event pairs, 118 based on Foata normal form. 61/5527 useless extension candidates. Maximal degree in co-relation 47832. Up to 1144 conditions per place. [2023-11-29 02:21:53,629 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 303 selfloop transitions, 991 changer transitions 4/1344 dead transitions. [2023-11-29 02:21:53,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 1344 transitions, 29806 flow [2023-11-29 02:21:53,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 02:21:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 02:21:53,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 552 transitions. [2023-11-29 02:21:53,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-29 02:21:53,631 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 552 transitions. [2023-11-29 02:21:53,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 552 transitions. [2023-11-29 02:21:53,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:21:53,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 552 transitions. [2023-11-29 02:21:53,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 24.0) internal successors, (552), 23 states have internal predecessors, (552), 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) [2023-11-29 02:21:53,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 36.0) internal successors, (864), 24 states have internal predecessors, (864), 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) [2023-11-29 02:21:53,634 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 36.0) internal successors, (864), 24 states have internal predecessors, (864), 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) [2023-11-29 02:21:53,634 INFO L175 Difference]: Start difference. First operand has 270 places, 1051 transitions, 21642 flow. Second operand 23 states and 552 transitions. [2023-11-29 02:21:53,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 1344 transitions, 29806 flow [2023-11-29 02:21:54,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 1344 transitions, 29695 flow, removed 30 selfloop flow, removed 3 redundant places. [2023-11-29 02:21:55,022 INFO L231 Difference]: Finished difference. Result has 301 places, 1259 transitions, 30116 flow [2023-11-29 02:21:55,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=21523, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1050, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=800, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=30116, PETRI_PLACES=301, PETRI_TRANSITIONS=1259} [2023-11-29 02:21:55,024 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 263 predicate places. [2023-11-29 02:21:55,025 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 1259 transitions, 30116 flow [2023-11-29 02:21:55,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 20.176470588235293) internal successors, (343), 17 states have internal predecessors, (343), 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) [2023-11-29 02:21:55,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:21:55,025 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:21:55,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:21:55,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 02:21:55,226 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:21:55,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:55,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1165277647, now seen corresponding path program 9 times [2023-11-29 02:21:55,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:55,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152297972] [2023-11-29 02:21:55,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:55,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:55,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:55,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152297972] [2023-11-29 02:21:55,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152297972] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:21:55,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613257952] [2023-11-29 02:21:55,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:21:55,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:55,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:21:55,462 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:21:55,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:21:55,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 02:21:55,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:21:55,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:21:55,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:21:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:55,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:21:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:21:55,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613257952] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:21:55,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:21:55,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2023-11-29 02:21:55,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592501872] [2023-11-29 02:21:55,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:21:55,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 02:21:55,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:55,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 02:21:55,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-29 02:21:55,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-29 02:21:55,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 1259 transitions, 30116 flow. Second operand has 17 states, 17 states have (on average 19.941176470588236) internal successors, (339), 17 states have internal predecessors, (339), 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) [2023-11-29 02:21:55,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:21:55,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-29 02:21:55,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:21:59,291 INFO L124 PetriNetUnfolderBase]: 3353/5999 cut-off events. [2023-11-29 02:21:59,291 INFO L125 PetriNetUnfolderBase]: For 133963/134022 co-relation queries the response was YES. [2023-11-29 02:21:59,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59402 conditions, 5999 events. 3353/5999 cut-off events. For 133963/134022 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 40673 event pairs, 168 based on Foata normal form. 68/6067 useless extension candidates. Maximal degree in co-relation 59291. Up to 1187 conditions per place. [2023-11-29 02:21:59,382 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 295 selfloop transitions, 1156 changer transitions 3/1500 dead transitions. [2023-11-29 02:21:59,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 1500 transitions, 38028 flow [2023-11-29 02:21:59,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 02:21:59,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 02:21:59,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 654 transitions. [2023-11-29 02:21:59,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6488095238095238 [2023-11-29 02:21:59,384 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 654 transitions. [2023-11-29 02:21:59,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 654 transitions. [2023-11-29 02:21:59,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:21:59,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 654 transitions. [2023-11-29 02:21:59,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 23.357142857142858) internal successors, (654), 28 states have internal predecessors, (654), 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) [2023-11-29 02:21:59,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 36.0) internal successors, (1044), 29 states have internal predecessors, (1044), 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) [2023-11-29 02:21:59,387 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 36.0) internal successors, (1044), 29 states have internal predecessors, (1044), 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) [2023-11-29 02:21:59,387 INFO L175 Difference]: Start difference. First operand has 301 places, 1259 transitions, 30116 flow. Second operand 28 states and 654 transitions. [2023-11-29 02:21:59,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 1500 transitions, 38028 flow [2023-11-29 02:22:01,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 1500 transitions, 37732 flow, removed 101 selfloop flow, removed 6 redundant places. [2023-11-29 02:22:01,348 INFO L231 Difference]: Finished difference. Result has 333 places, 1434 transitions, 38664 flow [2023-11-29 02:22:01,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=29765, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=999, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=38664, PETRI_PLACES=333, PETRI_TRANSITIONS=1434} [2023-11-29 02:22:01,350 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 295 predicate places. [2023-11-29 02:22:01,351 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 1434 transitions, 38664 flow [2023-11-29 02:22:01,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.941176470588236) internal successors, (339), 17 states have internal predecessors, (339), 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) [2023-11-29 02:22:01,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:01,351 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:01,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:22:01,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 02:22:01,552 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:22:01,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:01,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1768793685, now seen corresponding path program 10 times [2023-11-29 02:22:01,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:01,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692886596] [2023-11-29 02:22:01,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:01,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:22:01,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:01,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692886596] [2023-11-29 02:22:01,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692886596] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:22:01,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022335451] [2023-11-29 02:22:01,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:22:01,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:22:01,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:22:01,820 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:22:01,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:22:01,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:22:01,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:22:01,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 02:22:01,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:22:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:22:02,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:22:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:22:02,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022335451] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:22:02,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:22:02,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2023-11-29 02:22:02,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941620236] [2023-11-29 02:22:02,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:22:02,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 02:22:02,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:02,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 02:22:02,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-29 02:22:02,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 02:22:02,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 1434 transitions, 38664 flow. Second operand has 17 states, 17 states have (on average 19.941176470588236) internal successors, (339), 17 states have internal predecessors, (339), 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) [2023-11-29 02:22:02,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:02,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 02:22:02,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:08,301 INFO L124 PetriNetUnfolderBase]: 4815/8414 cut-off events. [2023-11-29 02:22:08,301 INFO L125 PetriNetUnfolderBase]: For 212651/212658 co-relation queries the response was YES. [2023-11-29 02:22:08,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90703 conditions, 8414 events. 4815/8414 cut-off events. For 212651/212658 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 58568 event pairs, 64 based on Foata normal form. 133/8547 useless extension candidates. Maximal degree in co-relation 90581. Up to 1705 conditions per place. [2023-11-29 02:22:08,491 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 780 selfloop transitions, 1410 changer transitions 33/2229 dead transitions. [2023-11-29 02:22:08,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 2229 transitions, 63496 flow [2023-11-29 02:22:08,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 02:22:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-29 02:22:08,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 866 transitions. [2023-11-29 02:22:08,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6501501501501501 [2023-11-29 02:22:08,494 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 866 transitions. [2023-11-29 02:22:08,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 866 transitions. [2023-11-29 02:22:08,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:08,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 866 transitions. [2023-11-29 02:22:08,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 23.405405405405407) internal successors, (866), 37 states have internal predecessors, (866), 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) [2023-11-29 02:22:08,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 36.0) internal successors, (1368), 38 states have internal predecessors, (1368), 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) [2023-11-29 02:22:08,500 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 36.0) internal successors, (1368), 38 states have internal predecessors, (1368), 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) [2023-11-29 02:22:08,500 INFO L175 Difference]: Start difference. First operand has 333 places, 1434 transitions, 38664 flow. Second operand 37 states and 866 transitions. [2023-11-29 02:22:08,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 2229 transitions, 63496 flow [2023-11-29 02:22:12,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 2229 transitions, 62891 flow, removed 167 selfloop flow, removed 14 redundant places. [2023-11-29 02:22:12,989 INFO L231 Difference]: Finished difference. Result has 377 places, 1971 transitions, 59437 flow [2023-11-29 02:22:12,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=37839, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=912, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=59437, PETRI_PLACES=377, PETRI_TRANSITIONS=1971} [2023-11-29 02:22:12,991 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 339 predicate places. [2023-11-29 02:22:12,991 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 1971 transitions, 59437 flow [2023-11-29 02:22:12,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.941176470588236) internal successors, (339), 17 states have internal predecessors, (339), 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) [2023-11-29 02:22:12,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:12,991 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:12,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:22:13,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 02:22:13,192 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:22:13,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:13,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1214065777, now seen corresponding path program 11 times [2023-11-29 02:22:13,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:13,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451872587] [2023-11-29 02:22:13,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:13,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:22:13,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:13,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451872587] [2023-11-29 02:22:13,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451872587] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:22:13,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152346476] [2023-11-29 02:22:13,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:22:13,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:22:13,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:22:13,411 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:22:13,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:22:13,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 02:22:13,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:22:13,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 02:22:13,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:22:13,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:22:13,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:22:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:22:13,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152346476] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:22:13,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:22:13,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2023-11-29 02:22:13,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994554058] [2023-11-29 02:22:13,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:22:13,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 02:22:13,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:13,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 02:22:13,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:22:13,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-29 02:22:13,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 1971 transitions, 59437 flow. Second operand has 18 states, 18 states have (on average 20.166666666666668) internal successors, (363), 18 states have internal predecessors, (363), 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) [2023-11-29 02:22:13,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:13,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-29 02:22:13,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:22,512 INFO L124 PetriNetUnfolderBase]: 5492/9792 cut-off events. [2023-11-29 02:22:22,512 INFO L125 PetriNetUnfolderBase]: For 354402/354423 co-relation queries the response was YES. [2023-11-29 02:22:22,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120233 conditions, 9792 events. 5492/9792 cut-off events. For 354402/354423 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 72202 event pairs, 68 based on Foata normal form. 97/9889 useless extension candidates. Maximal degree in co-relation 120090. Up to 1907 conditions per place. [2023-11-29 02:22:22,713 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 325 selfloop transitions, 2146 changer transitions 10/2560 dead transitions. [2023-11-29 02:22:22,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 2560 transitions, 81485 flow [2023-11-29 02:22:22,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 02:22:22,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-29 02:22:22,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 851 transitions. [2023-11-29 02:22:22,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6220760233918129 [2023-11-29 02:22:22,715 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 851 transitions. [2023-11-29 02:22:22,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 851 transitions. [2023-11-29 02:22:22,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:22,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 851 transitions. [2023-11-29 02:22:22,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 22.394736842105264) internal successors, (851), 38 states have internal predecessors, (851), 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) [2023-11-29 02:22:22,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 36.0) internal successors, (1404), 39 states have internal predecessors, (1404), 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) [2023-11-29 02:22:22,719 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 36.0) internal successors, (1404), 39 states have internal predecessors, (1404), 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) [2023-11-29 02:22:22,719 INFO L175 Difference]: Start difference. First operand has 377 places, 1971 transitions, 59437 flow. Second operand 38 states and 851 transitions. [2023-11-29 02:22:22,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 2560 transitions, 81485 flow [2023-11-29 02:22:30,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 2560 transitions, 80825 flow, removed 325 selfloop flow, removed 3 redundant places. [2023-11-29 02:22:30,976 INFO L231 Difference]: Finished difference. Result has 418 places, 2472 transitions, 80479 flow [2023-11-29 02:22:30,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=58747, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1651, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=80479, PETRI_PLACES=418, PETRI_TRANSITIONS=2472} [2023-11-29 02:22:30,978 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 380 predicate places. [2023-11-29 02:22:30,978 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 2472 transitions, 80479 flow [2023-11-29 02:22:30,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 20.166666666666668) internal successors, (363), 18 states have internal predecessors, (363), 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) [2023-11-29 02:22:30,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:30,978 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:30,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 02:22:31,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 02:22:31,179 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:22:31,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:31,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1588569939, now seen corresponding path program 12 times [2023-11-29 02:22:31,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:31,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226067665] [2023-11-29 02:22:31,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:31,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:22:31,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:31,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226067665] [2023-11-29 02:22:31,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226067665] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:22:31,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897253089] [2023-11-29 02:22:31,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:22:31,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:22:31,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:22:31,340 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:22:31,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:22:31,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 02:22:31,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:22:31,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:22:31,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:22:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:22:31,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:22:31,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:22:31,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897253089] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:22:31,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:22:31,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2023-11-29 02:22:31,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922907186] [2023-11-29 02:22:31,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:22:31,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 02:22:31,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:31,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 02:22:31,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-29 02:22:31,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-29 02:22:31,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 2472 transitions, 80479 flow. Second operand has 17 states, 17 states have (on average 19.88235294117647) internal successors, (338), 17 states have internal predecessors, (338), 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) [2023-11-29 02:22:31,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:31,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-29 02:22:31,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:40,951 INFO L124 PetriNetUnfolderBase]: 5541/9781 cut-off events. [2023-11-29 02:22:40,951 INFO L125 PetriNetUnfolderBase]: For 386822/386839 co-relation queries the response was YES. [2023-11-29 02:22:41,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128242 conditions, 9781 events. 5541/9781 cut-off events. For 386822/386839 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 71207 event pairs, 984 based on Foata normal form. 23/9803 useless extension candidates. Maximal degree in co-relation 128091. Up to 5570 conditions per place. [2023-11-29 02:22:41,196 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 1280 selfloop transitions, 1170 changer transitions 7/2536 dead transitions. [2023-11-29 02:22:41,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 2536 transitions, 86851 flow [2023-11-29 02:22:41,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:22:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 02:22:41,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 326 transitions. [2023-11-29 02:22:41,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6468253968253969 [2023-11-29 02:22:41,198 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 326 transitions. [2023-11-29 02:22:41,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 326 transitions. [2023-11-29 02:22:41,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:41,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 326 transitions. [2023-11-29 02:22:41,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 23.285714285714285) internal successors, (326), 14 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:41,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 36.0) internal successors, (540), 15 states have internal predecessors, (540), 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) [2023-11-29 02:22:41,200 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 36.0) internal successors, (540), 15 states have internal predecessors, (540), 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) [2023-11-29 02:22:41,200 INFO L175 Difference]: Start difference. First operand has 418 places, 2472 transitions, 80479 flow. Second operand 14 states and 326 transitions. [2023-11-29 02:22:41,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 2536 transitions, 86851 flow [2023-11-29 02:22:51,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 2536 transitions, 84893 flow, removed 757 selfloop flow, removed 10 redundant places. [2023-11-29 02:22:51,473 INFO L231 Difference]: Finished difference. Result has 429 places, 2501 transitions, 84178 flow [2023-11-29 02:22:51,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=78407, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=84178, PETRI_PLACES=429, PETRI_TRANSITIONS=2501} [2023-11-29 02:22:51,476 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 391 predicate places. [2023-11-29 02:22:51,476 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 2501 transitions, 84178 flow [2023-11-29 02:22:51,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.88235294117647) internal successors, (338), 17 states have internal predecessors, (338), 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) [2023-11-29 02:22:51,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:51,477 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:51,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:22:51,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 02:22:51,677 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:22:51,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:51,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1868795899, now seen corresponding path program 13 times [2023-11-29 02:22:51,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:51,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310109405] [2023-11-29 02:22:51,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:51,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:22:51,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:51,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310109405] [2023-11-29 02:22:51,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310109405] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:22:51,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967125462] [2023-11-29 02:22:51,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:22:51,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:22:51,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:22:51,893 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:22:51,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:22:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:51,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:22:51,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:22:52,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:22:52,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:22:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:22:52,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967125462] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:22:52,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:22:52,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2023-11-29 02:22:52,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951484117] [2023-11-29 02:22:52,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:22:52,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 02:22:52,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:52,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 02:22:52,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-11-29 02:22:52,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 02:22:52,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 2501 transitions, 84178 flow. Second operand has 17 states, 17 states have (on average 19.529411764705884) internal successors, (332), 17 states have internal predecessors, (332), 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) [2023-11-29 02:22:52,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:52,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 02:22:52,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:23:12,109 INFO L124 PetriNetUnfolderBase]: 9173/15728 cut-off events. [2023-11-29 02:23:12,109 INFO L125 PetriNetUnfolderBase]: For 581263/581277 co-relation queries the response was YES. [2023-11-29 02:23:12,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209554 conditions, 15728 events. 9173/15728 cut-off events. For 581263/581277 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 116589 event pairs, 106 based on Foata normal form. 186/15913 useless extension candidates. Maximal degree in co-relation 209402. Up to 5743 conditions per place. [2023-11-29 02:23:12,497 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 1818 selfloop transitions, 2535 changer transitions 25/4384 dead transitions. [2023-11-29 02:23:12,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 4384 transitions, 154999 flow [2023-11-29 02:23:12,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-29 02:23:12,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-11-29 02:23:12,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 1334 transitions. [2023-11-29 02:23:12,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628060263653484 [2023-11-29 02:23:12,500 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 1334 transitions. [2023-11-29 02:23:12,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 1334 transitions. [2023-11-29 02:23:12,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:23:12,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 1334 transitions. [2023-11-29 02:23:12,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 22.610169491525422) internal successors, (1334), 59 states have internal predecessors, (1334), 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) [2023-11-29 02:23:12,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 36.0) internal successors, (2160), 60 states have internal predecessors, (2160), 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) [2023-11-29 02:23:12,505 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 36.0) internal successors, (2160), 60 states have internal predecessors, (2160), 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) [2023-11-29 02:23:12,505 INFO L175 Difference]: Start difference. First operand has 429 places, 2501 transitions, 84178 flow. Second operand 59 states and 1334 transitions. [2023-11-29 02:23:12,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 4384 transitions, 154999 flow [2023-11-29 02:23:32,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 4384 transitions, 154823 flow, removed 26 selfloop flow, removed 5 redundant places. [2023-11-29 02:23:32,817 INFO L231 Difference]: Finished difference. Result has 515 places, 3892 transitions, 142328 flow [2023-11-29 02:23:32,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=83709, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=812, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=142328, PETRI_PLACES=515, PETRI_TRANSITIONS=3892} [2023-11-29 02:23:32,819 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 477 predicate places. [2023-11-29 02:23:32,819 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 3892 transitions, 142328 flow [2023-11-29 02:23:32,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.529411764705884) internal successors, (332), 17 states have internal predecessors, (332), 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) [2023-11-29 02:23:32,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:23:32,820 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:23:32,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 02:23:33,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:23:33,020 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:23:33,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:23:33,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1458685783, now seen corresponding path program 14 times [2023-11-29 02:23:33,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:23:33,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153202998] [2023-11-29 02:23:33,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:23:33,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:23:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:23:33,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:23:33,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:23:33,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153202998] [2023-11-29 02:23:33,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153202998] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:23:33,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315907902] [2023-11-29 02:23:33,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:23:33,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:23:33,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:23:33,265 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:23:33,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:23:33,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:23:33,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:23:33,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:23:33,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:23:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:23:33,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:23:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:23:33,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315907902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:23:33,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:23:33,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-29 02:23:33,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150813212] [2023-11-29 02:23:33,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:23:33,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 02:23:33,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:23:33,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 02:23:33,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:23:33,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-29 02:23:33,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 3892 transitions, 142328 flow. Second operand has 19 states, 19 states have (on average 19.842105263157894) internal successors, (377), 19 states have internal predecessors, (377), 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) [2023-11-29 02:23:33,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:23:33,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-29 02:23:33,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:23:58,953 INFO L124 PetriNetUnfolderBase]: 9047/16044 cut-off events. [2023-11-29 02:23:58,953 INFO L125 PetriNetUnfolderBase]: For 764827/764848 co-relation queries the response was YES. [2023-11-29 02:23:59,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234700 conditions, 16044 events. 9047/16044 cut-off events. For 764827/764848 co-relation queries the response was YES. Maximal size of possible extension queue 818. Compared 125185 event pairs, 908 based on Foata normal form. 46/16078 useless extension candidates. Maximal degree in co-relation 234513. Up to 6087 conditions per place. [2023-11-29 02:23:59,506 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 1787 selfloop transitions, 2226 changer transitions 2/4184 dead transitions. [2023-11-29 02:23:59,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 4184 transitions, 160599 flow [2023-11-29 02:23:59,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 02:23:59,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 02:23:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 542 transitions. [2023-11-29 02:23:59,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6545893719806763 [2023-11-29 02:23:59,508 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 542 transitions. [2023-11-29 02:23:59,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 542 transitions. [2023-11-29 02:23:59,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:23:59,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 542 transitions. [2023-11-29 02:23:59,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 23.565217391304348) internal successors, (542), 23 states have internal predecessors, (542), 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) [2023-11-29 02:23:59,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 36.0) internal successors, (864), 24 states have internal predecessors, (864), 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) [2023-11-29 02:23:59,512 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 36.0) internal successors, (864), 24 states have internal predecessors, (864), 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) [2023-11-29 02:23:59,512 INFO L175 Difference]: Start difference. First operand has 515 places, 3892 transitions, 142328 flow. Second operand 23 states and 542 transitions. [2023-11-29 02:23:59,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 4184 transitions, 160599 flow [2023-11-29 02:24:28,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 4184 transitions, 158610 flow, removed 795 selfloop flow, removed 7 redundant places. [2023-11-29 02:24:28,430 INFO L231 Difference]: Finished difference. Result has 538 places, 4071 transitions, 156294 flow [2023-11-29 02:24:28,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=140259, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3884, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2042, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=156294, PETRI_PLACES=538, PETRI_TRANSITIONS=4071} [2023-11-29 02:24:28,433 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 500 predicate places. [2023-11-29 02:24:28,433 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 4071 transitions, 156294 flow [2023-11-29 02:24:28,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.842105263157894) internal successors, (377), 19 states have internal predecessors, (377), 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) [2023-11-29 02:24:28,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:24:28,434 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:28,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 02:24:28,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:28,634 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:24:28,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:28,634 INFO L85 PathProgramCache]: Analyzing trace with hash -928607083, now seen corresponding path program 15 times [2023-11-29 02:24:28,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:28,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389858371] [2023-11-29 02:24:28,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:28,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:24:28,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:28,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389858371] [2023-11-29 02:24:28,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389858371] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:24:28,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831342413] [2023-11-29 02:24:28,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:24:28,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:28,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:24:28,845 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:24:28,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:24:28,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:24:28,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:24:28,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:24:28,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:24:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:24:29,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:24:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:24:29,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831342413] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:24:29,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:24:29,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 11 [2023-11-29 02:24:29,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496126106] [2023-11-29 02:24:29,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:24:29,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:24:29,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:29,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:24:29,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:24:29,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2023-11-29 02:24:29,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 4071 transitions, 156294 flow. Second operand has 12 states, 12 states have (on average 21.75) internal successors, (261), 12 states have internal predecessors, (261), 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) [2023-11-29 02:24:29,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:24:29,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2023-11-29 02:24:29,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:25:05,347 INFO L124 PetriNetUnfolderBase]: 11372/21171 cut-off events. [2023-11-29 02:25:05,347 INFO L125 PetriNetUnfolderBase]: For 1143051/1143726 co-relation queries the response was YES. [2023-11-29 02:25:06,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329489 conditions, 21171 events. 11372/21171 cut-off events. For 1143051/1143726 co-relation queries the response was YES. Maximal size of possible extension queue 1084. Compared 182044 event pairs, 64 based on Foata normal form. 233/21395 useless extension candidates. Maximal degree in co-relation 329297. Up to 6459 conditions per place. [2023-11-29 02:25:06,348 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 2565 selfloop transitions, 1124 changer transitions 380/5340 dead transitions. [2023-11-29 02:25:06,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 5340 transitions, 210360 flow [2023-11-29 02:25:06,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:25:06,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 02:25:06,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 291 transitions. [2023-11-29 02:25:06,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7348484848484849 [2023-11-29 02:25:06,350 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 291 transitions. [2023-11-29 02:25:06,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 291 transitions. [2023-11-29 02:25:06,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:25:06,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 291 transitions. [2023-11-29 02:25:06,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 26.454545454545453) internal successors, (291), 11 states have internal predecessors, (291), 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) [2023-11-29 02:25:06,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 36.0) internal successors, (432), 12 states have internal predecessors, (432), 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) [2023-11-29 02:25:06,352 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 36.0) internal successors, (432), 12 states have internal predecessors, (432), 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) [2023-11-29 02:25:06,352 INFO L175 Difference]: Start difference. First operand has 538 places, 4071 transitions, 156294 flow. Second operand 11 states and 291 transitions. [2023-11-29 02:25:06,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 5340 transitions, 210360 flow [2023-11-29 02:25:51,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 5340 transitions, 209602 flow, removed 157 selfloop flow, removed 13 redundant places. [2023-11-29 02:25:51,317 INFO L231 Difference]: Finished difference. Result has 542 places, 4490 transitions, 177977 flow [2023-11-29 02:25:51,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=155642, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=655, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3070, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=177977, PETRI_PLACES=542, PETRI_TRANSITIONS=4490} [2023-11-29 02:25:51,321 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 504 predicate places. [2023-11-29 02:25:51,321 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 4490 transitions, 177977 flow [2023-11-29 02:25:51,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.75) internal successors, (261), 12 states have internal predecessors, (261), 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) [2023-11-29 02:25:51,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:25:51,321 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:25:51,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 02:25:51,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:51,522 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:25:51,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:25:51,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1306225033, now seen corresponding path program 16 times [2023-11-29 02:25:51,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:25:51,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260493147] [2023-11-29 02:25:51,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:51,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:25:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:51,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:25:51,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260493147] [2023-11-29 02:25:51,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260493147] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:25:51,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928024337] [2023-11-29 02:25:51,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:25:51,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:51,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:25:51,991 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:25:51,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 02:25:52,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:25:52,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:25:52,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 02:25:52,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:25:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:52,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:25:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:52,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928024337] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:25:52,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:25:52,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 7] total 20 [2023-11-29 02:25:52,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679722938] [2023-11-29 02:25:52,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:25:52,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 02:25:52,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:25:52,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 02:25:52,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:25:52,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 02:25:52,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 4490 transitions, 177977 flow. Second operand has 21 states, 21 states have (on average 19.857142857142858) internal successors, (417), 21 states have internal predecessors, (417), 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) [2023-11-29 02:25:52,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:25:52,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 02:25:52,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:37,734 INFO L124 PetriNetUnfolderBase]: 13353/23544 cut-off events. [2023-11-29 02:26:37,734 INFO L125 PetriNetUnfolderBase]: For 1202359/1202377 co-relation queries the response was YES. [2023-11-29 02:26:38,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358291 conditions, 23544 events. 13353/23544 cut-off events. For 1202359/1202377 co-relation queries the response was YES. Maximal size of possible extension queue 1154. Compared 192139 event pairs, 74 based on Foata normal form. 145/23689 useless extension candidates. Maximal degree in co-relation 358095. Up to 8401 conditions per place. [2023-11-29 02:26:38,673 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 2652 selfloop transitions, 2756 changer transitions 114/5528 dead transitions. [2023-11-29 02:26:38,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 5528 transitions, 227068 flow [2023-11-29 02:26:38,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-29 02:26:38,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-29 02:26:38,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 928 transitions. [2023-11-29 02:26:38,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6287262872628726 [2023-11-29 02:26:38,675 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 928 transitions. [2023-11-29 02:26:38,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 928 transitions. [2023-11-29 02:26:38,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:38,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 928 transitions. [2023-11-29 02:26:38,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 22.634146341463413) internal successors, (928), 41 states have internal predecessors, (928), 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) [2023-11-29 02:26:38,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 36.0) internal successors, (1512), 42 states have internal predecessors, (1512), 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) [2023-11-29 02:26:38,678 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 36.0) internal successors, (1512), 42 states have internal predecessors, (1512), 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) [2023-11-29 02:26:38,678 INFO L175 Difference]: Start difference. First operand has 542 places, 4490 transitions, 177977 flow. Second operand 41 states and 928 transitions. [2023-11-29 02:26:38,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 5528 transitions, 227068 flow [2023-11-29 02:27:26,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 573 places, 5528 transitions, 225242 flow, removed 538 selfloop flow, removed 8 redundant places. [2023-11-29 02:27:27,003 INFO L231 Difference]: Finished difference. Result has 594 places, 4837 transitions, 203125 flow [2023-11-29 02:27:27,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=176105, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2005, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=203125, PETRI_PLACES=594, PETRI_TRANSITIONS=4837} [2023-11-29 02:27:27,007 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 556 predicate places. [2023-11-29 02:27:27,007 INFO L495 AbstractCegarLoop]: Abstraction has has 594 places, 4837 transitions, 203125 flow [2023-11-29 02:27:27,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 19.857142857142858) internal successors, (417), 21 states have internal predecessors, (417), 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) [2023-11-29 02:27:27,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:27:27,007 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:27:27,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 02:27:27,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 02:27:27,208 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:27:27,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:27,208 INFO L85 PathProgramCache]: Analyzing trace with hash -978530217, now seen corresponding path program 17 times [2023-11-29 02:27:27,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:27:27,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636756130] [2023-11-29 02:27:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:27,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:27:27,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:27:27,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:27:27,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636756130] [2023-11-29 02:27:27,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636756130] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:27:27,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802091279] [2023-11-29 02:27:27,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:27:27,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:27:27,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:27:27,478 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:27:27,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 02:27:27,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 02:27:27,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:27:27,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:27:27,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:27:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:27:27,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:27:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:27:28,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802091279] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:27:28,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:27:28,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-29 02:27:28,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56979950] [2023-11-29 02:27:28,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:27:28,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 02:27:28,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:27:28,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 02:27:28,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:27:28,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 02:27:28,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 4837 transitions, 203125 flow. Second operand has 23 states, 23 states have (on average 19.347826086956523) internal successors, (445), 23 states have internal predecessors, (445), 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) [2023-11-29 02:27:28,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:27:28,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 02:27:28,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:28:24,391 INFO L124 PetriNetUnfolderBase]: 15006/26130 cut-off events. [2023-11-29 02:28:24,392 INFO L125 PetriNetUnfolderBase]: For 1516170/1516185 co-relation queries the response was YES. [2023-11-29 02:28:25,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418634 conditions, 26130 events. 15006/26130 cut-off events. For 1516170/1516185 co-relation queries the response was YES. Maximal size of possible extension queue 1248. Compared 213260 event pairs, 78 based on Foata normal form. 46/26176 useless extension candidates. Maximal degree in co-relation 418422. Up to 14965 conditions per place. [2023-11-29 02:28:25,571 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 2815 selfloop transitions, 2895 changer transitions 14/5730 dead transitions. [2023-11-29 02:28:25,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 5730 transitions, 249611 flow [2023-11-29 02:28:25,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 02:28:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 02:28:25,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 626 transitions. [2023-11-29 02:28:25,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.621031746031746 [2023-11-29 02:28:25,573 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 626 transitions. [2023-11-29 02:28:25,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 626 transitions. [2023-11-29 02:28:25,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:28:25,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 626 transitions. [2023-11-29 02:28:25,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 22.357142857142858) internal successors, (626), 28 states have internal predecessors, (626), 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) [2023-11-29 02:28:25,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 36.0) internal successors, (1044), 29 states have internal predecessors, (1044), 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) [2023-11-29 02:28:25,577 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 36.0) internal successors, (1044), 29 states have internal predecessors, (1044), 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) [2023-11-29 02:28:25,577 INFO L175 Difference]: Start difference. First operand has 594 places, 4837 transitions, 203125 flow. Second operand 28 states and 626 transitions. [2023-11-29 02:28:25,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 5730 transitions, 249611 flow [2023-11-29 02:29:34,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 5730 transitions, 247951 flow, removed 780 selfloop flow, removed 5 redundant places. [2023-11-29 02:29:34,662 INFO L231 Difference]: Finished difference. Result has 632 places, 5494 transitions, 242718 flow [2023-11-29 02:29:34,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=201397, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4827, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=242718, PETRI_PLACES=632, PETRI_TRANSITIONS=5494} [2023-11-29 02:29:34,666 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 594 predicate places. [2023-11-29 02:29:34,666 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 5494 transitions, 242718 flow [2023-11-29 02:29:34,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 19.347826086956523) internal successors, (445), 23 states have internal predecessors, (445), 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) [2023-11-29 02:29:34,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:29:34,667 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:29:34,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 02:29:34,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 02:29:34,867 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:29:34,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:29:34,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1467307217, now seen corresponding path program 18 times [2023-11-29 02:29:34,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:29:34,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977556228] [2023-11-29 02:29:34,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:29:34,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:29:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:29:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:29:35,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:29:35,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977556228] [2023-11-29 02:29:35,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977556228] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:29:35,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256776776] [2023-11-29 02:29:35,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:29:35,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:29:35,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:29:35,153 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:29:35,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 02:29:35,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 02:29:35,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:29:35,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 02:29:35,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:29:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:29:35,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:29:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:29:36,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256776776] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:29:36,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:29:36,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2023-11-29 02:29:36,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413270061] [2023-11-29 02:29:36,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:29:36,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 02:29:36,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:29:36,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 02:29:36,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:29:36,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 02:29:36,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 5494 transitions, 242718 flow. Second operand has 24 states, 24 states have (on average 19.208333333333332) internal successors, (461), 24 states have internal predecessors, (461), 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) [2023-11-29 02:29:36,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:29:36,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 02:29:36,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:31:04,812 INFO L124 PetriNetUnfolderBase]: 18208/31953 cut-off events. [2023-11-29 02:31:04,812 INFO L125 PetriNetUnfolderBase]: For 2129856/2129873 co-relation queries the response was YES. [2023-11-29 02:31:05,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536495 conditions, 31953 events. 18208/31953 cut-off events. For 2129856/2129873 co-relation queries the response was YES. Maximal size of possible extension queue 1558. Compared 272126 event pairs, 117 based on Foata normal form. 175/32128 useless extension candidates. Maximal degree in co-relation 536265. Up to 12254 conditions per place. [2023-11-29 02:31:06,298 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 2879 selfloop transitions, 4129 changer transitions 13/7027 dead transitions. [2023-11-29 02:31:06,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 680 places, 7027 transitions, 320971 flow [2023-11-29 02:31:06,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 02:31:06,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-29 02:31:06,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 1113 transitions. [2023-11-29 02:31:06,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062091503267973 [2023-11-29 02:31:06,300 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 1113 transitions. [2023-11-29 02:31:06,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 1113 transitions. [2023-11-29 02:31:06,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:31:06,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 1113 transitions. [2023-11-29 02:31:06,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 21.823529411764707) internal successors, (1113), 51 states have internal predecessors, (1113), 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) [2023-11-29 02:31:06,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 36.0) internal successors, (1872), 52 states have internal predecessors, (1872), 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) [2023-11-29 02:31:06,306 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 36.0) internal successors, (1872), 52 states have internal predecessors, (1872), 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) [2023-11-29 02:31:06,306 INFO L175 Difference]: Start difference. First operand has 632 places, 5494 transitions, 242718 flow. Second operand 51 states and 1113 transitions. [2023-11-29 02:31:06,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 680 places, 7027 transitions, 320971 flow [2023-11-29 02:32:52,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 675 places, 7027 transitions, 319949 flow, removed 418 selfloop flow, removed 5 redundant places. [2023-11-29 02:32:53,138 INFO L231 Difference]: Finished difference. Result has 706 places, 6559 transitions, 308848 flow [2023-11-29 02:32:53,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=241983, PETRI_DIFFERENCE_MINUEND_PLACES=625, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1930, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=308848, PETRI_PLACES=706, PETRI_TRANSITIONS=6559} [2023-11-29 02:32:53,143 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 668 predicate places. [2023-11-29 02:32:53,144 INFO L495 AbstractCegarLoop]: Abstraction has has 706 places, 6559 transitions, 308848 flow [2023-11-29 02:32:53,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 19.208333333333332) internal successors, (461), 24 states have internal predecessors, (461), 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) [2023-11-29 02:32:53,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:32:53,144 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:32:53,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 02:32:53,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 02:32:53,344 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:32:53,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:32:53,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1861882571, now seen corresponding path program 19 times [2023-11-29 02:32:53,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:32:53,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838774965] [2023-11-29 02:32:53,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:32:53,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:32:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:32:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:32:53,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:32:53,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838774965] [2023-11-29 02:32:53,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838774965] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:32:53,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561374262] [2023-11-29 02:32:53,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:32:53,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:32:53,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:32:53,647 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:32:53,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c89d1b4-ad11-433e-bb0f-0fd67bc00428/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 02:32:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:32:53,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:32:53,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:32:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:32:53,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:32:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:32:54,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561374262] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:32:54,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:32:54,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-29 02:32:54,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6623496] [2023-11-29 02:32:54,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:32:54,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 02:32:54,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:32:54,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 02:32:54,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2023-11-29 02:32:54,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 02:32:54,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 706 places, 6559 transitions, 308848 flow. Second operand has 22 states, 22 states have (on average 19.09090909090909) internal successors, (420), 22 states have internal predecessors, (420), 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) [2023-11-29 02:32:54,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:32:54,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 02:32:54,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:34:44,463 INFO L124 PetriNetUnfolderBase]: 18209/31895 cut-off events. [2023-11-29 02:34:44,463 INFO L125 PetriNetUnfolderBase]: For 2396128/2396143 co-relation queries the response was YES. [2023-11-29 02:34:46,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 562767 conditions, 31895 events. 18209/31895 cut-off events. For 2396128/2396143 co-relation queries the response was YES. Maximal size of possible extension queue 1537. Compared 270853 event pairs, 91 based on Foata normal form. 14/31909 useless extension candidates. Maximal degree in co-relation 562506. Up to 22110 conditions per place. [2023-11-29 02:34:46,459 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 3547 selfloop transitions, 3093 changer transitions 11/6657 dead transitions. [2023-11-29 02:34:46,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 727 places, 6657 transitions, 324519 flow [2023-11-29 02:34:46,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 02:34:46,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 02:34:46,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 480 transitions. [2023-11-29 02:34:46,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2023-11-29 02:34:46,461 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 480 transitions. [2023-11-29 02:34:46,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 480 transitions. [2023-11-29 02:34:46,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:34:46,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 480 transitions. [2023-11-29 02:34:46,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 21.818181818181817) internal successors, (480), 22 states have internal predecessors, (480), 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) [2023-11-29 02:34:46,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 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) [2023-11-29 02:34:46,464 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 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) [2023-11-29 02:34:46,464 INFO L175 Difference]: Start difference. First operand has 706 places, 6559 transitions, 308848 flow. Second operand 22 states and 480 transitions. [2023-11-29 02:34:46,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 727 places, 6657 transitions, 324519 flow