./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.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_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/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_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/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_4c296ef6-01dd-45fc-a752-840546f55869/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 fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:57:07,690 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:57:07,758 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 01:57:07,763 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:57:07,764 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:57:07,790 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:57:07,791 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:57:07,791 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:57:07,792 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:57:07,792 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:57:07,793 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:57:07,793 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:57:07,794 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:57:07,795 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:57:07,795 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:57:07,796 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:57:07,796 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:57:07,797 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:57:07,797 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:57:07,798 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:57:07,798 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 01:57:07,799 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 01:57:07,800 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 01:57:07,800 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:57:07,800 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 01:57:07,801 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 01:57:07,801 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:57:07,802 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:57:07,802 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:57:07,803 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:57:07,803 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:57:07,803 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:57:07,804 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:57:07,804 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:57:07,804 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:57:07,804 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:57:07,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:57:07,818 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:57:07,818 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:57:07,818 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:57:07,818 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:57:07,819 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_4c296ef6-01dd-45fc-a752-840546f55869/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2023-11-29 01:57:08,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:57:08,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:57:08,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:57:08,062 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:57:08,062 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:57:08,064 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-29 01:57:10,844 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:57:11,001 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:57:11,001 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-29 01:57:11,007 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/data/aad261c1e/a1972e36398842d7a2643413e5b636f9/FLAG692ec1e3b [2023-11-29 01:57:11,018 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/data/aad261c1e/a1972e36398842d7a2643413e5b636f9 [2023-11-29 01:57:11,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:57:11,022 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:57:11,023 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:57:11,023 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:57:11,028 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:57:11,029 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:57:11" (1/1) ... [2023-11-29 01:57:11,030 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@732ee04f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:11, skipping insertion in model container [2023-11-29 01:57:11,030 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:57:11" (1/1) ... [2023-11-29 01:57:11,053 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:57:11,218 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:57:11,229 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:57:11,252 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:57:11,261 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:57:11,261 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:57:11,269 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:57:11,269 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:11 WrapperNode [2023-11-29 01:57:11,269 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:57:11,271 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:57:11,271 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:57:11,271 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:57:11,279 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:11" (1/1) ... [2023-11-29 01:57:11,287 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:11" (1/1) ... [2023-11-29 01:57:11,309 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 55 [2023-11-29 01:57:11,309 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:57:11,310 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:57:11,310 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:57:11,310 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:57:11,320 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:11" (1/1) ... [2023-11-29 01:57:11,320 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:11" (1/1) ... [2023-11-29 01:57:11,323 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:11" (1/1) ... [2023-11-29 01:57:11,340 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 01:57:11,340 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:11" (1/1) ... [2023-11-29 01:57:11,341 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:11" (1/1) ... [2023-11-29 01:57:11,348 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:11" (1/1) ... [2023-11-29 01:57:11,352 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:11" (1/1) ... [2023-11-29 01:57:11,354 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:11" (1/1) ... [2023-11-29 01:57:11,355 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:11" (1/1) ... [2023-11-29 01:57:11,358 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:57:11,359 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:57:11,359 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:57:11,360 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:57:11,360 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:11" (1/1) ... [2023-11-29 01:57:11,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:57:11,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:11,388 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:57:11,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:57:11,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:57:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 01:57:11,420 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 01:57:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 01:57:11,420 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 01:57:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:57:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:57:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 01:57:11,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:57:11,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:57:11,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:57:11,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 01:57:11,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 01:57:11,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 01:57:11,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:57:11,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:57:11,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 01:57:11,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 01:57:11,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 01:57:11,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:57:11,424 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 01:57:11,522 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:57:11,524 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:57:11,712 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:57:11,854 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:57:11,854 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 01:57:11,855 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:57:11 BoogieIcfgContainer [2023-11-29 01:57:11,855 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:57:11,857 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:57:11,857 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:57:11,860 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:57:11,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:57:11" (1/3) ... [2023-11-29 01:57:11,861 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d6bdc31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:57:11, skipping insertion in model container [2023-11-29 01:57:11,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:11" (2/3) ... [2023-11-29 01:57:11,861 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d6bdc31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:57:11, skipping insertion in model container [2023-11-29 01:57:11,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:57:11" (3/3) ... [2023-11-29 01:57:11,863 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-11-29 01:57:11,879 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:57:11,879 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-29 01:57:11,879 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 01:57:11,919 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 01:57:11,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 36 transitions, 86 flow [2023-11-29 01:57:12,013 INFO L124 PetriNetUnfolderBase]: 2/34 cut-off events. [2023-11-29 01:57:12,013 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 01:57:12,016 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 50 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 01:57:12,016 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 36 transitions, 86 flow [2023-11-29 01:57:12,020 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 33 transitions, 78 flow [2023-11-29 01:57:12,032 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:57:12,039 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;@26c6462e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:57:12,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-29 01:57:12,043 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:57:12,044 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 01:57:12,044 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:57:12,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:12,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 01:57:12,045 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 01:57:12,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:12,051 INFO L85 PathProgramCache]: Analyzing trace with hash 8570, now seen corresponding path program 1 times [2023-11-29 01:57:12,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:12,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779261273] [2023-11-29 01:57:12,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:12,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:12,335 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 01:57:12,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:12,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779261273] [2023-11-29 01:57:12,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779261273] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:57:12,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:57:12,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:57:12,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109849033] [2023-11-29 01:57:12,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:57:12,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:57:12,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:12,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:57:12,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:57:12,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-29 01:57:12,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 01:57:12,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:12,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-29 01:57:12,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:12,498 INFO L124 PetriNetUnfolderBase]: 72/159 cut-off events. [2023-11-29 01:57:12,498 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-29 01:57:12,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 159 events. 72/159 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 513 event pairs, 48 based on Foata normal form. 1/142 useless extension candidates. Maximal degree in co-relation 254. Up to 123 conditions per place. [2023-11-29 01:57:12,504 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 16 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-11-29 01:57:12,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 104 flow [2023-11-29 01:57:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:57:12,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:57:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2023-11-29 01:57:12,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6018518518518519 [2023-11-29 01:57:12,519 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 65 transitions. [2023-11-29 01:57:12,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 65 transitions. [2023-11-29 01:57:12,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:12,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 65 transitions. [2023-11-29 01:57:12,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 01:57:12,530 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 01:57:12,530 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 01:57:12,532 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 78 flow. Second operand 3 states and 65 transitions. [2023-11-29 01:57:12,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 104 flow [2023-11-29 01:57:12,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 96 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 01:57:12,539 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 64 flow [2023-11-29 01:57:12,541 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 01:57:12,546 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-11-29 01:57:12,546 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 64 flow [2023-11-29 01:57:12,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 01:57:12,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:12,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 01:57:12,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:57:12,547 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 01:57:12,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:12,548 INFO L85 PathProgramCache]: Analyzing trace with hash 8571, now seen corresponding path program 1 times [2023-11-29 01:57:12,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:12,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127115615] [2023-11-29 01:57:12,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:12,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:12,679 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 01:57:12,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:12,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127115615] [2023-11-29 01:57:12,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127115615] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:57:12,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:57:12,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:57:12,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161234954] [2023-11-29 01:57:12,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:57:12,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:57:12,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:12,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:57:12,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:57:12,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 01:57:12,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 01:57:12,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:12,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 01:57:12,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:12,763 INFO L124 PetriNetUnfolderBase]: 48/118 cut-off events. [2023-11-29 01:57:12,763 INFO L125 PetriNetUnfolderBase]: For 4/5 co-relation queries the response was YES. [2023-11-29 01:57:12,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 118 events. 48/118 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 367 event pairs, 31 based on Foata normal form. 13/114 useless extension candidates. Maximal degree in co-relation 207. Up to 86 conditions per place. [2023-11-29 01:57:12,766 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 14 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-29 01:57:12,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 27 transitions, 90 flow [2023-11-29 01:57:12,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:57:12,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:57:12,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-29 01:57:12,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2023-11-29 01:57:12,768 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-29 01:57:12,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-29 01:57:12,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:12,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-29 01:57:12,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 01:57:12,771 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 01:57:12,771 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 01:57:12,772 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 64 flow. Second operand 3 states and 68 transitions. [2023-11-29 01:57:12,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 27 transitions, 90 flow [2023-11-29 01:57:12,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 89 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:57:12,774 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 61 flow [2023-11-29 01:57:12,774 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 01:57:12,775 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -7 predicate places. [2023-11-29 01:57:12,775 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 61 flow [2023-11-29 01:57:12,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 01:57:12,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:12,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 01:57:12,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 01:57:12,777 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 01:57:12,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:12,777 INFO L85 PathProgramCache]: Analyzing trace with hash 255533216, now seen corresponding path program 1 times [2023-11-29 01:57:12,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:12,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802973174] [2023-11-29 01:57:12,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:12,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:12,843 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 01:57:12,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:12,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802973174] [2023-11-29 01:57:12,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802973174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:57:12,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:57:12,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:57:12,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963289669] [2023-11-29 01:57:12,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:57:12,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:57:12,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:12,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:57:12,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:57:12,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-29 01:57:12,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 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 01:57:12,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:12,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-29 01:57:12,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:12,922 INFO L124 PetriNetUnfolderBase]: 55/122 cut-off events. [2023-11-29 01:57:12,923 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 01:57:12,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 122 events. 55/122 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 351 event pairs, 36 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 225. Up to 100 conditions per place. [2023-11-29 01:57:12,924 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 16 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-11-29 01:57:12,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 91 flow [2023-11-29 01:57:12,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:57:12,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:57:12,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2023-11-29 01:57:12,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2023-11-29 01:57:12,926 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 64 transitions. [2023-11-29 01:57:12,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 64 transitions. [2023-11-29 01:57:12,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:12,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 64 transitions. [2023-11-29 01:57:12,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 01:57:12,928 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 01:57:12,929 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 01:57:12,929 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 61 flow. Second operand 3 states and 64 transitions. [2023-11-29 01:57:12,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 91 flow [2023-11-29 01:57:12,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 90 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:57:12,931 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 58 flow [2023-11-29 01:57:12,931 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 01:57:12,932 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -8 predicate places. [2023-11-29 01:57:12,932 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 58 flow [2023-11-29 01:57:12,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 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 01:57:12,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:12,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 01:57:12,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 01:57:12,933 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 01:57:12,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:12,934 INFO L85 PathProgramCache]: Analyzing trace with hash 255533217, now seen corresponding path program 1 times [2023-11-29 01:57:12,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:12,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408562035] [2023-11-29 01:57:12,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:12,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:13,003 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 01:57:13,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:13,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408562035] [2023-11-29 01:57:13,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408562035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:57:13,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:57:13,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:57:13,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912106586] [2023-11-29 01:57:13,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:57:13,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:57:13,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:13,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:57:13,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:57:13,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 01:57:13,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 01:57:13,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:13,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 01:57:13,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:13,068 INFO L124 PetriNetUnfolderBase]: 48/108 cut-off events. [2023-11-29 01:57:13,068 INFO L125 PetriNetUnfolderBase]: For 4/5 co-relation queries the response was YES. [2023-11-29 01:57:13,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 108 events. 48/108 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 305 event pairs, 31 based on Foata normal form. 6/107 useless extension candidates. Maximal degree in co-relation 197. Up to 86 conditions per place. [2023-11-29 01:57:13,070 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 14 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-11-29 01:57:13,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 84 flow [2023-11-29 01:57:13,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:57:13,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:57:13,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-29 01:57:13,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2023-11-29 01:57:13,072 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-29 01:57:13,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-29 01:57:13,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:13,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-29 01:57:13,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 01:57:13,074 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 01:57:13,074 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 01:57:13,074 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 58 flow. Second operand 3 states and 68 transitions. [2023-11-29 01:57:13,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 84 flow [2023-11-29 01:57:13,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 23 transitions, 83 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:57:13,076 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 55 flow [2023-11-29 01:57:13,076 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 01:57:13,077 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -9 predicate places. [2023-11-29 01:57:13,077 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 55 flow [2023-11-29 01:57:13,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 01:57:13,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:13,078 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 01:57:13,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 01:57:13,078 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 01:57:13,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:13,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1439962673, now seen corresponding path program 1 times [2023-11-29 01:57:13,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:13,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869712940] [2023-11-29 01:57:13,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:13,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:13,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:13,171 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 01:57:13,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:13,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869712940] [2023-11-29 01:57:13,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869712940] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:57:13,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:57:13,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:57:13,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980723827] [2023-11-29 01:57:13,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:57:13,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:57:13,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:13,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:57:13,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:57:13,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2023-11-29 01:57:13,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 55 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 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 01:57:13,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:13,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2023-11-29 01:57:13,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:13,243 INFO L124 PetriNetUnfolderBase]: 70/154 cut-off events. [2023-11-29 01:57:13,244 INFO L125 PetriNetUnfolderBase]: For 4/7 co-relation queries the response was YES. [2023-11-29 01:57:13,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 154 events. 70/154 cut-off events. For 4/7 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 491 event pairs, 33 based on Foata normal form. 8/155 useless extension candidates. Maximal degree in co-relation 283. Up to 86 conditions per place. [2023-11-29 01:57:13,246 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 20 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-11-29 01:57:13,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 118 flow [2023-11-29 01:57:13,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:57:13,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 01:57:13,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2023-11-29 01:57:13,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2023-11-29 01:57:13,248 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 100 transitions. [2023-11-29 01:57:13,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 100 transitions. [2023-11-29 01:57:13,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:13,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 100 transitions. [2023-11-29 01:57:13,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 01:57:13,249 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 01:57:13,250 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 01:57:13,250 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 55 flow. Second operand 4 states and 100 transitions. [2023-11-29 01:57:13,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 118 flow [2023-11-29 01:57:13,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 31 transitions, 117 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:57:13,252 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 68 flow [2023-11-29 01:57:13,252 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=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-11-29 01:57:13,253 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-11-29 01:57:13,253 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 68 flow [2023-11-29 01:57:13,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 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 01:57:13,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:13,253 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 01:57:13,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 01:57:13,254 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 01:57:13,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:13,254 INFO L85 PathProgramCache]: Analyzing trace with hash 665411574, now seen corresponding path program 1 times [2023-11-29 01:57:13,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:13,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881111077] [2023-11-29 01:57:13,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:13,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:13,333 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 01:57:13,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:13,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881111077] [2023-11-29 01:57:13,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881111077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:57:13,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:57:13,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:57:13,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114508828] [2023-11-29 01:57:13,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:57:13,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:57:13,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:13,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:57:13,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:57:13,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2023-11-29 01:57:13,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 01:57:13,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:13,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2023-11-29 01:57:13,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:13,412 INFO L124 PetriNetUnfolderBase]: 89/196 cut-off events. [2023-11-29 01:57:13,412 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-11-29 01:57:13,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 196 events. 89/196 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 711 event pairs, 49 based on Foata normal form. 13/204 useless extension candidates. Maximal degree in co-relation 407. Up to 124 conditions per place. [2023-11-29 01:57:13,415 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 21 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2023-11-29 01:57:13,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 143 flow [2023-11-29 01:57:13,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:57:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 01:57:13,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2023-11-29 01:57:13,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2023-11-29 01:57:13,417 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 99 transitions. [2023-11-29 01:57:13,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 99 transitions. [2023-11-29 01:57:13,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:13,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 99 transitions. [2023-11-29 01:57:13,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 01:57:13,419 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 01:57:13,420 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 01:57:13,420 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 68 flow. Second operand 4 states and 99 transitions. [2023-11-29 01:57:13,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 143 flow [2023-11-29 01:57:13,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 137 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:57:13,422 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 78 flow [2023-11-29 01:57:13,422 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 01:57:13,423 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-11-29 01:57:13,423 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 78 flow [2023-11-29 01:57:13,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 01:57:13,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:13,423 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 01:57:13,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 01:57:13,424 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 01:57:13,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:13,424 INFO L85 PathProgramCache]: Analyzing trace with hash 293102942, now seen corresponding path program 1 times [2023-11-29 01:57:13,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:13,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255725749] [2023-11-29 01:57:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:13,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:13,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:57:13,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:13,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255725749] [2023-11-29 01:57:13,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255725749] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:57:13,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944683003] [2023-11-29 01:57:13,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:13,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:13,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:13,567 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:13,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:57:13,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:13,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:57:13,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:57:13,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:57:13,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944683003] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 01:57:13,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:57:13,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 5 [2023-11-29 01:57:13,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659539738] [2023-11-29 01:57:13,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:57:13,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:57:13,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:13,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:57:13,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:57:13,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2023-11-29 01:57:13,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 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 01:57:13,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:13,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2023-11-29 01:57:13,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:14,094 INFO L124 PetriNetUnfolderBase]: 153/330 cut-off events. [2023-11-29 01:57:14,095 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-11-29 01:57:14,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 330 events. 153/330 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1336 event pairs, 23 based on Foata normal form. 1/330 useless extension candidates. Maximal degree in co-relation 784. Up to 97 conditions per place. [2023-11-29 01:57:14,099 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 35 selfloop transitions, 5 changer transitions 3/51 dead transitions. [2023-11-29 01:57:14,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 51 transitions, 252 flow [2023-11-29 01:57:14,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:57:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 01:57:14,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2023-11-29 01:57:14,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7986111111111112 [2023-11-29 01:57:14,101 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 115 transitions. [2023-11-29 01:57:14,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 115 transitions. [2023-11-29 01:57:14,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:14,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 115 transitions. [2023-11-29 01:57:14,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 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 01:57:14,103 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 01:57:14,103 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 01:57:14,103 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 78 flow. Second operand 4 states and 115 transitions. [2023-11-29 01:57:14,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 51 transitions, 252 flow [2023-11-29 01:57:14,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:57:14,106 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 112 flow [2023-11-29 01:57:14,106 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=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-11-29 01:57:14,107 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-11-29 01:57:14,107 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 112 flow [2023-11-29 01:57:14,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 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 01:57:14,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:14,107 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 01:57:14,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:57:14,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:14,308 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 01:57:14,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:14,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1621803826, now seen corresponding path program 2 times [2023-11-29 01:57:14,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:14,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303484209] [2023-11-29 01:57:14,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:14,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:14,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:57:14,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:14,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303484209] [2023-11-29 01:57:14,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303484209] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:57:14,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039798830] [2023-11-29 01:57:14,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:57:14,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:14,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:14,429 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:14,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:57:14,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:57:14,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:57:14,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:57:14,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:57:14,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:57:14,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039798830] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:57:14,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:57:14,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-29 01:57:14,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362495951] [2023-11-29 01:57:14,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:57:14,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:57:14,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:14,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:57:14,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:57:14,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-29 01:57:14,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 112 flow. Second operand has 10 states, 10 states have (on average 21.5) internal successors, (215), 10 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:57:14,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:14,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-29 01:57:14,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:15,010 INFO L124 PetriNetUnfolderBase]: 286/565 cut-off events. [2023-11-29 01:57:15,011 INFO L125 PetriNetUnfolderBase]: For 370/374 co-relation queries the response was YES. [2023-11-29 01:57:15,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1518 conditions, 565 events. 286/565 cut-off events. For 370/374 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2471 event pairs, 42 based on Foata normal form. 20/584 useless extension candidates. Maximal degree in co-relation 1504. Up to 242 conditions per place. [2023-11-29 01:57:15,017 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 40 selfloop transitions, 13 changer transitions 0/60 dead transitions. [2023-11-29 01:57:15,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 60 transitions, 349 flow [2023-11-29 01:57:15,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:57:15,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 01:57:15,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2023-11-29 01:57:15,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2023-11-29 01:57:15,018 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 148 transitions. [2023-11-29 01:57:15,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 148 transitions. [2023-11-29 01:57:15,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:15,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 148 transitions. [2023-11-29 01:57:15,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 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 01:57:15,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 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 01:57:15,021 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 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 01:57:15,021 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 112 flow. Second operand 6 states and 148 transitions. [2023-11-29 01:57:15,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 60 transitions, 349 flow [2023-11-29 01:57:15,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 349 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 01:57:15,025 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 233 flow [2023-11-29 01:57:15,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2023-11-29 01:57:15,026 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2023-11-29 01:57:15,027 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 233 flow [2023-11-29 01:57:15,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.5) internal successors, (215), 10 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:57:15,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:15,027 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 01:57:15,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:57:15,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 01:57:15,234 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 01:57:15,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:15,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1759011537, now seen corresponding path program 3 times [2023-11-29 01:57:15,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:15,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486590252] [2023-11-29 01:57:15,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:15,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:15,433 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 01:57:15,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:15,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486590252] [2023-11-29 01:57:15,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486590252] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:57:15,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568763153] [2023-11-29 01:57:15,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:57:15,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:15,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:15,449 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:15,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:57:15,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 01:57:15,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:57:15,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:57:15,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:15,716 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 01:57:15,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:15,874 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 01:57:15,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568763153] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:57:15,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:57:15,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2023-11-29 01:57:15,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997072702] [2023-11-29 01:57:15,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:57:15,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 01:57:15,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:15,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 01:57:15,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:57:15,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 01:57:15,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 233 flow. Second operand has 19 states, 19 states have (on average 19.789473684210527) internal successors, (376), 19 states have internal predecessors, (376), 0 states have call successors, (0), 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 01:57:15,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:15,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 01:57:15,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:16,880 INFO L124 PetriNetUnfolderBase]: 643/1175 cut-off events. [2023-11-29 01:57:16,880 INFO L125 PetriNetUnfolderBase]: For 1936/1938 co-relation queries the response was YES. [2023-11-29 01:57:16,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3836 conditions, 1175 events. 643/1175 cut-off events. For 1936/1938 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5625 event pairs, 20 based on Foata normal form. 39/1214 useless extension candidates. Maximal degree in co-relation 3816. Up to 229 conditions per place. [2023-11-29 01:57:16,892 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 140 selfloop transitions, 81 changer transitions 22/249 dead transitions. [2023-11-29 01:57:16,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 249 transitions, 1719 flow [2023-11-29 01:57:16,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 01:57:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-29 01:57:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 876 transitions. [2023-11-29 01:57:16,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6239316239316239 [2023-11-29 01:57:16,898 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 876 transitions. [2023-11-29 01:57:16,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 876 transitions. [2023-11-29 01:57:16,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:16,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 876 transitions. [2023-11-29 01:57:16,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 22.46153846153846) internal successors, (876), 39 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 01:57:16,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 36.0) internal successors, (1440), 40 states have internal predecessors, (1440), 0 states have call successors, (0), 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 01:57:16,908 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 36.0) internal successors, (1440), 40 states have internal predecessors, (1440), 0 states have call successors, (0), 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 01:57:16,908 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 233 flow. Second operand 39 states and 876 transitions. [2023-11-29 01:57:16,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 249 transitions, 1719 flow [2023-11-29 01:57:16,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 249 transitions, 1711 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-29 01:57:16,925 INFO L231 Difference]: Finished difference. Result has 104 places, 104 transitions, 980 flow [2023-11-29 01:57:16,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=980, PETRI_PLACES=104, PETRI_TRANSITIONS=104} [2023-11-29 01:57:16,926 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 66 predicate places. [2023-11-29 01:57:16,926 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 104 transitions, 980 flow [2023-11-29 01:57:16,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.789473684210527) internal successors, (376), 19 states have internal predecessors, (376), 0 states have call successors, (0), 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 01:57:16,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:16,927 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 01:57:16,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:57:17,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:17,129 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 01:57:17,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:17,129 INFO L85 PathProgramCache]: Analyzing trace with hash -63672689, now seen corresponding path program 4 times [2023-11-29 01:57:17,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:17,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057952612] [2023-11-29 01:57:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:17,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:17,308 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 01:57:17,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:17,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057952612] [2023-11-29 01:57:17,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057952612] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:57:17,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28845661] [2023-11-29 01:57:17,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:57:17,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:17,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:17,311 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:17,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:57:17,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:57:17,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:57:17,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:57:17,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:17,503 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 01:57:17,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:17,590 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 01:57:17,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28845661] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:57:17,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:57:17,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2023-11-29 01:57:17,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099885089] [2023-11-29 01:57:17,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:57:17,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 01:57:17,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:17,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 01:57:17,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:57:17,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 01:57:17,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 104 transitions, 980 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 01:57:17,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:17,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 01:57:17,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:18,440 INFO L124 PetriNetUnfolderBase]: 1021/1843 cut-off events. [2023-11-29 01:57:18,440 INFO L125 PetriNetUnfolderBase]: For 18531/18531 co-relation queries the response was YES. [2023-11-29 01:57:18,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9565 conditions, 1843 events. 1021/1843 cut-off events. For 18531/18531 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9714 event pairs, 35 based on Foata normal form. 87/1930 useless extension candidates. Maximal degree in co-relation 9523. Up to 328 conditions per place. [2023-11-29 01:57:18,462 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 147 selfloop transitions, 158 changer transitions 3/314 dead transitions. [2023-11-29 01:57:18,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 314 transitions, 3432 flow [2023-11-29 01:57:18,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 01:57:18,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 01:57:18,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 641 transitions. [2023-11-29 01:57:18,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6359126984126984 [2023-11-29 01:57:18,466 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 641 transitions. [2023-11-29 01:57:18,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 641 transitions. [2023-11-29 01:57:18,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:18,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 641 transitions. [2023-11-29 01:57:18,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 22.892857142857142) internal successors, (641), 28 states have internal predecessors, (641), 0 states have call successors, (0), 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 01:57:18,471 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 01:57:18,472 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 01:57:18,472 INFO L175 Difference]: Start difference. First operand has 104 places, 104 transitions, 980 flow. Second operand 28 states and 641 transitions. [2023-11-29 01:57:18,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 314 transitions, 3432 flow [2023-11-29 01:57:18,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 314 transitions, 3209 flow, removed 105 selfloop flow, removed 4 redundant places. [2023-11-29 01:57:18,542 INFO L231 Difference]: Finished difference. Result has 144 places, 201 transitions, 2430 flow [2023-11-29 01:57:18,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2430, PETRI_PLACES=144, PETRI_TRANSITIONS=201} [2023-11-29 01:57:18,543 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 106 predicate places. [2023-11-29 01:57:18,543 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 201 transitions, 2430 flow [2023-11-29 01:57:18,543 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 01:57:18,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:18,543 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 01:57:18,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:57:18,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:18,745 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 01:57:18,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:18,745 INFO L85 PathProgramCache]: Analyzing trace with hash -90697453, now seen corresponding path program 5 times [2023-11-29 01:57:18,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:18,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955779291] [2023-11-29 01:57:18,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:18,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:18,877 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 01:57:18,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:18,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955779291] [2023-11-29 01:57:18,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955779291] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:57:18,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149997991] [2023-11-29 01:57:18,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:57:18,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:18,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:18,879 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:18,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:57:18,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 01:57:18,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:57:18,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:57:18,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:19,076 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 01:57:19,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:19,179 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 01:57:19,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149997991] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:57:19,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:57:19,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 01:57:19,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023815367] [2023-11-29 01:57:19,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:57:19,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:57:19,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:19,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:57:19,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:57:19,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 01:57:19,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 201 transitions, 2430 flow. Second operand has 18 states, 18 states have (on average 19.11111111111111) internal successors, (344), 18 states have internal predecessors, (344), 0 states have call successors, (0), 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 01:57:19,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:19,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 01:57:19,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:20,514 INFO L124 PetriNetUnfolderBase]: 1671/2932 cut-off events. [2023-11-29 01:57:20,514 INFO L125 PetriNetUnfolderBase]: For 52803/52803 co-relation queries the response was YES. [2023-11-29 01:57:20,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19779 conditions, 2932 events. 1671/2932 cut-off events. For 52803/52803 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16548 event pairs, 27 based on Foata normal form. 28/2960 useless extension candidates. Maximal degree in co-relation 19719. Up to 514 conditions per place. [2023-11-29 01:57:20,569 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 205 selfloop transitions, 252 changer transitions 0/463 dead transitions. [2023-11-29 01:57:20,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 463 transitions, 6441 flow [2023-11-29 01:57:20,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 01:57:20,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 01:57:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 665 transitions. [2023-11-29 01:57:20,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6369731800766284 [2023-11-29 01:57:20,573 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 665 transitions. [2023-11-29 01:57:20,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 665 transitions. [2023-11-29 01:57:20,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:20,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 665 transitions. [2023-11-29 01:57:20,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 22.93103448275862) internal successors, (665), 29 states have internal predecessors, (665), 0 states have call successors, (0), 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 01:57:20,579 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 01:57:20,580 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 01:57:20,580 INFO L175 Difference]: Start difference. First operand has 144 places, 201 transitions, 2430 flow. Second operand 29 states and 665 transitions. [2023-11-29 01:57:20,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 463 transitions, 6441 flow [2023-11-29 01:57:20,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 463 transitions, 6236 flow, removed 96 selfloop flow, removed 2 redundant places. [2023-11-29 01:57:20,817 INFO L231 Difference]: Finished difference. Result has 183 places, 325 transitions, 5001 flow [2023-11-29 01:57:20,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2281, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5001, PETRI_PLACES=183, PETRI_TRANSITIONS=325} [2023-11-29 01:57:20,818 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 145 predicate places. [2023-11-29 01:57:20,818 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 325 transitions, 5001 flow [2023-11-29 01:57:20,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 19.11111111111111) internal successors, (344), 18 states have internal predecessors, (344), 0 states have call successors, (0), 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 01:57:20,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:20,819 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 01:57:20,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:57:21,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:21,020 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 01:57:21,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:21,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1783732873, now seen corresponding path program 6 times [2023-11-29 01:57:21,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:21,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6168656] [2023-11-29 01:57:21,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:21,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:21,159 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 01:57:21,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:21,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6168656] [2023-11-29 01:57:21,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6168656] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:57:21,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390921219] [2023-11-29 01:57:21,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:57:21,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:21,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:21,161 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:21,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:57:21,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 01:57:21,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:57:21,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:57:21,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:21,357 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 01:57:21,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:21,508 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 01:57:21,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390921219] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:57:21,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:57:21,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-29 01:57:21,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204858773] [2023-11-29 01:57:21,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:57:21,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 01:57:21,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:21,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 01:57:21,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:57:21,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 01:57:21,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 325 transitions, 5001 flow. Second operand has 19 states, 19 states have (on average 19.473684210526315) internal successors, (370), 19 states have internal predecessors, (370), 0 states have call successors, (0), 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 01:57:21,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:21,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 01:57:21,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:23,166 INFO L124 PetriNetUnfolderBase]: 2193/3838 cut-off events. [2023-11-29 01:57:23,166 INFO L125 PetriNetUnfolderBase]: For 103153/103155 co-relation queries the response was YES. [2023-11-29 01:57:23,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29308 conditions, 3838 events. 2193/3838 cut-off events. For 103153/103155 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 22414 event pairs, 34 based on Foata normal form. 106/3944 useless extension candidates. Maximal degree in co-relation 29233. Up to 678 conditions per place. [2023-11-29 01:57:23,219 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 215 selfloop transitions, 442 changer transitions 4/667 dead transitions. [2023-11-29 01:57:23,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 667 transitions, 11121 flow [2023-11-29 01:57:23,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-29 01:57:23,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-29 01:57:23,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 1091 transitions. [2023-11-29 01:57:23,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6184807256235828 [2023-11-29 01:57:23,224 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 1091 transitions. [2023-11-29 01:57:23,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 1091 transitions. [2023-11-29 01:57:23,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:23,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 1091 transitions. [2023-11-29 01:57:23,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 22.26530612244898) internal successors, (1091), 49 states have internal predecessors, (1091), 0 states have call successors, (0), 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 01:57:23,232 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 01:57:23,232 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 01:57:23,232 INFO L175 Difference]: Start difference. First operand has 183 places, 325 transitions, 5001 flow. Second operand 49 states and 1091 transitions. [2023-11-29 01:57:23,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 667 transitions, 11121 flow [2023-11-29 01:57:23,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 667 transitions, 10216 flow, removed 421 selfloop flow, removed 9 redundant places. [2023-11-29 01:57:23,704 INFO L231 Difference]: Finished difference. Result has 253 places, 517 transitions, 9033 flow [2023-11-29 01:57:23,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=4538, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=9033, PETRI_PLACES=253, PETRI_TRANSITIONS=517} [2023-11-29 01:57:23,705 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 215 predicate places. [2023-11-29 01:57:23,705 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 517 transitions, 9033 flow [2023-11-29 01:57:23,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.473684210526315) internal successors, (370), 19 states have internal predecessors, (370), 0 states have call successors, (0), 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 01:57:23,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:23,706 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 01:57:23,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 01:57:23,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:23,909 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 01:57:23,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:23,909 INFO L85 PathProgramCache]: Analyzing trace with hash -217938475, now seen corresponding path program 7 times [2023-11-29 01:57:23,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:23,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793450234] [2023-11-29 01:57:23,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:23,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:24,063 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 01:57:24,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:24,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793450234] [2023-11-29 01:57:24,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793450234] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:57:24,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770464332] [2023-11-29 01:57:24,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:57:24,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:24,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:24,065 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:24,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:57:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:24,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 01:57:24,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:24,296 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 01:57:24,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:24,422 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 01:57:24,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770464332] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:57:24,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:57:24,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-11-29 01:57:24,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300010398] [2023-11-29 01:57:24,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:57:24,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 01:57:24,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:24,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 01:57:24,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-11-29 01:57:24,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 01:57:24,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 517 transitions, 9033 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 01:57:24,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:24,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 01:57:24,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:26,895 INFO L124 PetriNetUnfolderBase]: 3369/5905 cut-off events. [2023-11-29 01:57:26,895 INFO L125 PetriNetUnfolderBase]: For 180200/180200 co-relation queries the response was YES. [2023-11-29 01:57:26,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52045 conditions, 5905 events. 3369/5905 cut-off events. For 180200/180200 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 37459 event pairs, 40 based on Foata normal form. 99/6004 useless extension candidates. Maximal degree in co-relation 51940. Up to 1094 conditions per place. [2023-11-29 01:57:26,986 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 339 selfloop transitions, 715 changer transitions 7/1067 dead transitions. [2023-11-29 01:57:26,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1067 transitions, 20674 flow [2023-11-29 01:57:26,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 01:57:26,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-29 01:57:26,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 1020 transitions. [2023-11-29 01:57:26,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6159420289855072 [2023-11-29 01:57:26,989 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 1020 transitions. [2023-11-29 01:57:26,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 1020 transitions. [2023-11-29 01:57:26,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:26,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 1020 transitions. [2023-11-29 01:57:26,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 22.17391304347826) internal successors, (1020), 46 states have internal predecessors, (1020), 0 states have call successors, (0), 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 01:57:26,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 36.0) internal successors, (1692), 47 states have internal predecessors, (1692), 0 states have call successors, (0), 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 01:57:26,997 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 36.0) internal successors, (1692), 47 states have internal predecessors, (1692), 0 states have call successors, (0), 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 01:57:26,997 INFO L175 Difference]: Start difference. First operand has 253 places, 517 transitions, 9033 flow. Second operand 46 states and 1020 transitions. [2023-11-29 01:57:26,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1067 transitions, 20674 flow [2023-11-29 01:57:28,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 1067 transitions, 19734 flow, removed 392 selfloop flow, removed 13 redundant places. [2023-11-29 01:57:28,215 INFO L231 Difference]: Finished difference. Result has 305 places, 869 transitions, 17374 flow [2023-11-29 01:57:28,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=8489, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=17374, PETRI_PLACES=305, PETRI_TRANSITIONS=869} [2023-11-29 01:57:28,216 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 267 predicate places. [2023-11-29 01:57:28,216 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 869 transitions, 17374 flow [2023-11-29 01:57:28,216 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 01:57:28,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:28,217 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 01:57:28,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 01:57:28,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:28,417 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 01:57:28,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:28,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1280313235, now seen corresponding path program 8 times [2023-11-29 01:57:28,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:28,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880993877] [2023-11-29 01:57:28,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:28,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:28,570 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 01:57:28,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:28,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880993877] [2023-11-29 01:57:28,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880993877] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:57:28,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131684306] [2023-11-29 01:57:28,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:57:28,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:28,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:28,572 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:28,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:57:28,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:57:28,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:57:28,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:57:28,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:28,758 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 01:57:28,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:28,890 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 01:57:28,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131684306] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:57:28,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:57:28,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-29 01:57:28,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726628147] [2023-11-29 01:57:28,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:57:28,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 01:57:28,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:28,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 01:57:28,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2023-11-29 01:57:28,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 01:57:28,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 869 transitions, 17374 flow. Second operand has 21 states, 21 states have (on average 19.238095238095237) internal successors, (404), 21 states have internal predecessors, (404), 0 states have call successors, (0), 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 01:57:28,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:28,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 01:57:28,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:32,117 INFO L124 PetriNetUnfolderBase]: 3844/6640 cut-off events. [2023-11-29 01:57:32,117 INFO L125 PetriNetUnfolderBase]: For 270123/270123 co-relation queries the response was YES. [2023-11-29 01:57:32,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65703 conditions, 6640 events. 3844/6640 cut-off events. For 270123/270123 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 42352 event pairs, 106 based on Foata normal form. 16/6656 useless extension candidates. Maximal degree in co-relation 65583. Up to 1418 conditions per place. [2023-11-29 01:57:32,251 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 499 selfloop transitions, 623 changer transitions 6/1134 dead transitions. [2023-11-29 01:57:32,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1134 transitions, 24910 flow [2023-11-29 01:57:32,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 01:57:32,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-29 01:57:32,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 770 transitions. [2023-11-29 01:57:32,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2023-11-29 01:57:32,254 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 770 transitions. [2023-11-29 01:57:32,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 770 transitions. [2023-11-29 01:57:32,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:32,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 770 transitions. [2023-11-29 01:57:32,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 22.0) internal successors, (770), 35 states have internal predecessors, (770), 0 states have call successors, (0), 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 01:57:32,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 36.0) internal successors, (1296), 36 states have internal predecessors, (1296), 0 states have call successors, (0), 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 01:57:32,261 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 36.0) internal successors, (1296), 36 states have internal predecessors, (1296), 0 states have call successors, (0), 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 01:57:32,261 INFO L175 Difference]: Start difference. First operand has 305 places, 869 transitions, 17374 flow. Second operand 35 states and 770 transitions. [2023-11-29 01:57:32,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1134 transitions, 24910 flow [2023-11-29 01:57:34,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 1134 transitions, 24258 flow, removed 298 selfloop flow, removed 11 redundant places. [2023-11-29 01:57:34,466 INFO L231 Difference]: Finished difference. Result has 342 places, 988 transitions, 21119 flow [2023-11-29 01:57:34,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=16950, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=869, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=510, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=21119, PETRI_PLACES=342, PETRI_TRANSITIONS=988} [2023-11-29 01:57:34,467 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 304 predicate places. [2023-11-29 01:57:34,467 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 988 transitions, 21119 flow [2023-11-29 01:57:34,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 19.238095238095237) internal successors, (404), 21 states have internal predecessors, (404), 0 states have call successors, (0), 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 01:57:34,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:34,468 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 01:57:34,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 01:57:34,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:34,668 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 01:57:34,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:34,669 INFO L85 PathProgramCache]: Analyzing trace with hash -202069929, now seen corresponding path program 9 times [2023-11-29 01:57:34,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:34,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608811118] [2023-11-29 01:57:34,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:34,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:34,785 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 01:57:34,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:34,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608811118] [2023-11-29 01:57:34,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608811118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:57:34,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587167717] [2023-11-29 01:57:34,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:57:34,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:34,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:34,786 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:34,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:57:34,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 01:57:34,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:57:34,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:57:34,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:34,961 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 01:57:34,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:35,074 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 01:57:35,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587167717] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:57:35,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:57:35,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-29 01:57:35,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103886684] [2023-11-29 01:57:35,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:57:35,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 01:57:35,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:35,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 01:57:35,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:57:35,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 01:57:35,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 988 transitions, 21119 flow. Second operand has 20 states, 20 states have (on average 19.3) internal successors, (386), 20 states have internal predecessors, (386), 0 states have call successors, (0), 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 01:57:35,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:35,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 01:57:35,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:39,450 INFO L124 PetriNetUnfolderBase]: 4296/7479 cut-off events. [2023-11-29 01:57:39,450 INFO L125 PetriNetUnfolderBase]: For 358682/358682 co-relation queries the response was YES. [2023-11-29 01:57:39,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78279 conditions, 7479 events. 4296/7479 cut-off events. For 358682/358682 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 49187 event pairs, 98 based on Foata normal form. 103/7582 useless extension candidates. Maximal degree in co-relation 78145. Up to 1345 conditions per place. [2023-11-29 01:57:39,589 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 309 selfloop transitions, 999 changer transitions 3/1317 dead transitions. [2023-11-29 01:57:39,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1317 transitions, 30427 flow [2023-11-29 01:57:39,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 01:57:39,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-29 01:57:39,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 1023 transitions. [2023-11-29 01:57:39,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6177536231884058 [2023-11-29 01:57:39,593 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 1023 transitions. [2023-11-29 01:57:39,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 1023 transitions. [2023-11-29 01:57:39,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:39,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 1023 transitions. [2023-11-29 01:57:39,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 22.23913043478261) internal successors, (1023), 46 states have internal predecessors, (1023), 0 states have call successors, (0), 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 01:57:39,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 36.0) internal successors, (1692), 47 states have internal predecessors, (1692), 0 states have call successors, (0), 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 01:57:39,599 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 36.0) internal successors, (1692), 47 states have internal predecessors, (1692), 0 states have call successors, (0), 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 01:57:39,599 INFO L175 Difference]: Start difference. First operand has 342 places, 988 transitions, 21119 flow. Second operand 46 states and 1023 transitions. [2023-11-29 01:57:39,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1317 transitions, 30427 flow [2023-11-29 01:57:42,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1317 transitions, 29994 flow, removed 175 selfloop flow, removed 11 redundant places. [2023-11-29 01:57:42,597 INFO L231 Difference]: Finished difference. Result has 392 places, 1177 transitions, 28872 flow [2023-11-29 01:57:42,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=20668, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=982, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=824, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=28872, PETRI_PLACES=392, PETRI_TRANSITIONS=1177} [2023-11-29 01:57:42,598 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 354 predicate places. [2023-11-29 01:57:42,598 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 1177 transitions, 28872 flow [2023-11-29 01:57:42,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.3) internal successors, (386), 20 states have internal predecessors, (386), 0 states have call successors, (0), 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 01:57:42,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:42,599 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 01:57:42,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:57:42,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 01:57:42,799 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 01:57:42,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:42,800 INFO L85 PathProgramCache]: Analyzing trace with hash -735050357, now seen corresponding path program 10 times [2023-11-29 01:57:42,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:42,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970067747] [2023-11-29 01:57:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:42,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:42,930 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 01:57:42,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:42,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970067747] [2023-11-29 01:57:42,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970067747] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:57:42,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438909602] [2023-11-29 01:57:42,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:57:42,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:42,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:42,932 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:42,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:57:43,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:57:43,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:57:43,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:57:43,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:43,088 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 01:57:43,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:57:43,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438909602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:57:43,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:57:43,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2023-11-29 01:57:43,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937345070] [2023-11-29 01:57:43,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:57:43,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:57:43,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:43,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:57:43,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:57:43,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 01:57:43,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 1177 transitions, 28872 flow. Second operand has 15 states, 15 states have (on average 19.533333333333335) internal successors, (293), 15 states have internal predecessors, (293), 0 states have call successors, (0), 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 01:57:43,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:43,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 01:57:43,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:47,586 INFO L124 PetriNetUnfolderBase]: 4296/7470 cut-off events. [2023-11-29 01:57:47,586 INFO L125 PetriNetUnfolderBase]: For 442865/442865 co-relation queries the response was YES. [2023-11-29 01:57:47,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86311 conditions, 7470 events. 4296/7470 cut-off events. For 442865/442865 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 49056 event pairs, 198 based on Foata normal form. 18/7488 useless extension candidates. Maximal degree in co-relation 86159. Up to 1633 conditions per place. [2023-11-29 01:57:47,710 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 644 selfloop transitions, 601 changer transitions 4/1255 dead transitions. [2023-11-29 01:57:47,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 1255 transitions, 32954 flow [2023-11-29 01:57:47,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 01:57:47,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 01:57:47,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 419 transitions. [2023-11-29 01:57:47,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6466049382716049 [2023-11-29 01:57:47,711 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 419 transitions. [2023-11-29 01:57:47,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 419 transitions. [2023-11-29 01:57:47,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:47,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 419 transitions. [2023-11-29 01:57:47,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 23.27777777777778) internal successors, (419), 18 states have internal predecessors, (419), 0 states have call successors, (0), 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 01:57:47,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 36.0) internal successors, (684), 19 states have internal predecessors, (684), 0 states have call successors, (0), 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 01:57:47,714 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 36.0) internal successors, (684), 19 states have internal predecessors, (684), 0 states have call successors, (0), 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 01:57:47,714 INFO L175 Difference]: Start difference. First operand has 392 places, 1177 transitions, 28872 flow. Second operand 18 states and 419 transitions. [2023-11-29 01:57:47,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 1255 transitions, 32954 flow [2023-11-29 01:57:51,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1255 transitions, 32180 flow, removed 291 selfloop flow, removed 20 redundant places. [2023-11-29 01:57:51,172 INFO L231 Difference]: Finished difference. Result has 390 places, 1182 transitions, 29993 flow [2023-11-29 01:57:51,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=27989, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=588, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=29993, PETRI_PLACES=390, PETRI_TRANSITIONS=1182} [2023-11-29 01:57:51,173 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 352 predicate places. [2023-11-29 01:57:51,173 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 1182 transitions, 29993 flow [2023-11-29 01:57:51,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 19.533333333333335) internal successors, (293), 15 states have internal predecessors, (293), 0 states have call successors, (0), 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 01:57:51,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:51,174 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 01:57:51,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 01:57:51,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 01:57:51,374 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 01:57:51,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:51,375 INFO L85 PathProgramCache]: Analyzing trace with hash -829827441, now seen corresponding path program 11 times [2023-11-29 01:57:51,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:51,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067114962] [2023-11-29 01:57:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:51,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:51,490 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 01:57:51,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:51,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067114962] [2023-11-29 01:57:51,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067114962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:57:51,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076223467] [2023-11-29 01:57:51,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:57:51,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:51,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:51,492 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:51,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:57:51,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 01:57:51,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:57:51,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:57:51,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:51,684 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 01:57:51,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:51,780 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 01:57:51,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076223467] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:57:51,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:57:51,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-29 01:57:51,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367212473] [2023-11-29 01:57:51,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:57:51,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 01:57:51,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:51,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 01:57:51,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2023-11-29 01:57:51,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 01:57:51,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 1182 transitions, 29993 flow. Second operand has 21 states, 21 states have (on average 19.238095238095237) internal successors, (404), 21 states have internal predecessors, (404), 0 states have call successors, (0), 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 01:57:51,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:51,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 01:57:51,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:56,396 INFO L124 PetriNetUnfolderBase]: 4514/7788 cut-off events. [2023-11-29 01:57:56,396 INFO L125 PetriNetUnfolderBase]: For 435178/435178 co-relation queries the response was YES. [2023-11-29 01:57:56,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90990 conditions, 7788 events. 4514/7788 cut-off events. For 435178/435178 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 51128 event pairs, 149 based on Foata normal form. 10/7798 useless extension candidates. Maximal degree in co-relation 90837. Up to 1672 conditions per place. [2023-11-29 01:57:56,558 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 694 selfloop transitions, 628 changer transitions 4/1332 dead transitions. [2023-11-29 01:57:56,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 1332 transitions, 36002 flow [2023-11-29 01:57:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 01:57:56,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 01:57:56,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 431 transitions. [2023-11-29 01:57:56,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6301169590643275 [2023-11-29 01:57:56,560 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 431 transitions. [2023-11-29 01:57:56,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 431 transitions. [2023-11-29 01:57:56,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:56,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 431 transitions. [2023-11-29 01:57:56,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 22.68421052631579) internal successors, (431), 19 states have internal predecessors, (431), 0 states have call successors, (0), 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 01:57:56,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 36.0) internal successors, (720), 20 states have internal predecessors, (720), 0 states have call successors, (0), 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 01:57:56,564 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 36.0) internal successors, (720), 20 states have internal predecessors, (720), 0 states have call successors, (0), 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 01:57:56,565 INFO L175 Difference]: Start difference. First operand has 390 places, 1182 transitions, 29993 flow. Second operand 19 states and 431 transitions. [2023-11-29 01:57:56,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 1332 transitions, 36002 flow [2023-11-29 01:58:00,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 1332 transitions, 34669 flow, removed 76 selfloop flow, removed 18 redundant places. [2023-11-29 01:58:00,450 INFO L231 Difference]: Finished difference. Result has 394 places, 1224 transitions, 31644 flow [2023-11-29 01:58:00,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=28807, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=589, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=31644, PETRI_PLACES=394, PETRI_TRANSITIONS=1224} [2023-11-29 01:58:00,452 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 356 predicate places. [2023-11-29 01:58:00,452 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 1224 transitions, 31644 flow [2023-11-29 01:58:00,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 19.238095238095237) internal successors, (404), 21 states have internal predecessors, (404), 0 states have call successors, (0), 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 01:58:00,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:58:00,452 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 01:58:00,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 01:58:00,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:58:00,653 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 01:58:00,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:00,653 INFO L85 PathProgramCache]: Analyzing trace with hash -918804849, now seen corresponding path program 12 times [2023-11-29 01:58:00,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:00,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763090613] [2023-11-29 01:58:00,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:00,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:00,795 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 01:58:00,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:00,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763090613] [2023-11-29 01:58:00,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763090613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:00,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371908132] [2023-11-29 01:58:00,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:58:00,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:00,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:00,797 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:00,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:58:00,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 01:58:00,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:58:00,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 01:58:00,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:01,014 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 01:58:01,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:01,142 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 01:58:01,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371908132] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:01,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:58:01,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-11-29 01:58:01,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357862965] [2023-11-29 01:58:01,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:01,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 01:58:01,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:01,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 01:58:01,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2023-11-29 01:58:01,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 01:58:01,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1224 transitions, 31644 flow. Second operand has 23 states, 23 states have (on average 19.217391304347824) internal successors, (442), 23 states have internal predecessors, (442), 0 states have call successors, (0), 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 01:58:01,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:58:01,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 01:58:01,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:58:06,268 INFO L124 PetriNetUnfolderBase]: 4957/8641 cut-off events. [2023-11-29 01:58:06,268 INFO L125 PetriNetUnfolderBase]: For 449767/449767 co-relation queries the response was YES. [2023-11-29 01:58:06,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100197 conditions, 8641 events. 4957/8641 cut-off events. For 449767/449767 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 58669 event pairs, 61 based on Foata normal form. 125/8765 useless extension candidates. Maximal degree in co-relation 100042. Up to 3894 conditions per place. [2023-11-29 01:58:06,427 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 760 selfloop transitions, 735 changer transitions 3/1504 dead transitions. [2023-11-29 01:58:06,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 1504 transitions, 40964 flow [2023-11-29 01:58:06,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 01:58:06,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 01:58:06,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 598 transitions. [2023-11-29 01:58:06,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2023-11-29 01:58:06,429 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 598 transitions. [2023-11-29 01:58:06,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 598 transitions. [2023-11-29 01:58:06,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:58:06,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 598 transitions. [2023-11-29 01:58:06,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 23.0) internal successors, (598), 26 states have internal predecessors, (598), 0 states have call successors, (0), 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 01:58:06,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 36.0) internal successors, (972), 27 states have internal predecessors, (972), 0 states have call successors, (0), 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 01:58:06,432 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 36.0) internal successors, (972), 27 states have internal predecessors, (972), 0 states have call successors, (0), 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 01:58:06,432 INFO L175 Difference]: Start difference. First operand has 394 places, 1224 transitions, 31644 flow. Second operand 26 states and 598 transitions. [2023-11-29 01:58:06,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 1504 transitions, 40964 flow [2023-11-29 01:58:11,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 1504 transitions, 40505 flow, removed 58 selfloop flow, removed 11 redundant places. [2023-11-29 01:58:11,398 INFO L231 Difference]: Finished difference. Result has 419 places, 1326 transitions, 36979 flow [2023-11-29 01:58:11,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=31228, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=641, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=36979, PETRI_PLACES=419, PETRI_TRANSITIONS=1326} [2023-11-29 01:58:11,399 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 381 predicate places. [2023-11-29 01:58:11,399 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 1326 transitions, 36979 flow [2023-11-29 01:58:11,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 19.217391304347824) internal successors, (442), 23 states have internal predecessors, (442), 0 states have call successors, (0), 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 01:58:11,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:58:11,400 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 01:58:11,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 01:58:11,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 01:58:11,600 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 01:58:11,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:11,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1966945789, now seen corresponding path program 13 times [2023-11-29 01:58:11,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:11,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392600546] [2023-11-29 01:58:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:11,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:11,729 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 01:58:11,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:11,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392600546] [2023-11-29 01:58:11,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392600546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:11,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672862267] [2023-11-29 01:58:11,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:58:11,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:11,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:11,731 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:11,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:58:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:11,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:58:11,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:11,916 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 01:58:11,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:12,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:58:12,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672862267] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:12,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:58:12,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-11-29 01:58:12,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822969748] [2023-11-29 01:58:12,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:12,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 01:58:12,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:12,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 01:58:12,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:58:12,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 01:58:12,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 1326 transitions, 36979 flow. Second operand has 19 states, 19 states have (on average 19.42105263157895) internal successors, (369), 19 states have internal predecessors, (369), 0 states have call successors, (0), 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 01:58:12,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:58:12,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 01:58:12,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:58:17,771 INFO L124 PetriNetUnfolderBase]: 5118/8855 cut-off events. [2023-11-29 01:58:17,771 INFO L125 PetriNetUnfolderBase]: For 586370/586370 co-relation queries the response was YES. [2023-11-29 01:58:17,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111451 conditions, 8855 events. 5118/8855 cut-off events. For 586370/586370 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 59229 event pairs, 268 based on Foata normal form. 8/8862 useless extension candidates. Maximal degree in co-relation 111289. Up to 7160 conditions per place. [2023-11-29 01:58:17,984 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 1267 selfloop transitions, 170 changer transitions 4/1447 dead transitions. [2023-11-29 01:58:17,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 1447 transitions, 43228 flow [2023-11-29 01:58:17,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 01:58:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 01:58:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 341 transitions. [2023-11-29 01:58:17,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314814814814815 [2023-11-29 01:58:17,986 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 341 transitions. [2023-11-29 01:58:17,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 341 transitions. [2023-11-29 01:58:17,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:58:17,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 341 transitions. [2023-11-29 01:58:17,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 22.733333333333334) internal successors, (341), 15 states have internal predecessors, (341), 0 states have call successors, (0), 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 01:58:17,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 36.0) internal successors, (576), 16 states have internal predecessors, (576), 0 states have call successors, (0), 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 01:58:17,989 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 36.0) internal successors, (576), 16 states have internal predecessors, (576), 0 states have call successors, (0), 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 01:58:17,989 INFO L175 Difference]: Start difference. First operand has 419 places, 1326 transitions, 36979 flow. Second operand 15 states and 341 transitions. [2023-11-29 01:58:17,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 1447 transitions, 43228 flow [2023-11-29 01:58:23,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 1447 transitions, 42542 flow, removed 315 selfloop flow, removed 6 redundant places. [2023-11-29 01:58:23,271 INFO L231 Difference]: Finished difference. Result has 433 places, 1377 transitions, 38498 flow [2023-11-29 01:58:23,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=36507, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=38498, PETRI_PLACES=433, PETRI_TRANSITIONS=1377} [2023-11-29 01:58:23,273 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 395 predicate places. [2023-11-29 01:58:23,273 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 1377 transitions, 38498 flow [2023-11-29 01:58:23,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.42105263157895) internal successors, (369), 19 states have internal predecessors, (369), 0 states have call successors, (0), 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 01:58:23,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:58:23,273 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 01:58:23,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 01:58:23,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:23,474 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 01:58:23,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:23,474 INFO L85 PathProgramCache]: Analyzing trace with hash 428917707, now seen corresponding path program 14 times [2023-11-29 01:58:23,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:23,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036725021] [2023-11-29 01:58:23,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:23,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:23,607 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 01:58:23,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:23,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036725021] [2023-11-29 01:58:23,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036725021] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:23,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104310143] [2023-11-29 01:58:23,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:58:23,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:23,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:23,610 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:23,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:58:23,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:58:23,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:58:23,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:58:23,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:23,808 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 01:58:23,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:23,911 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 01:58:23,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104310143] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:23,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:58:23,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-29 01:58:23,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249527355] [2023-11-29 01:58:23,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:23,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 01:58:23,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:23,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 01:58:23,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-11-29 01:58:23,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 01:58:23,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 1377 transitions, 38498 flow. Second operand has 21 states, 21 states have (on average 19.238095238095237) internal successors, (404), 21 states have internal predecessors, (404), 0 states have call successors, (0), 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 01:58:23,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:58:23,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 01:58:23,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:58:30,331 INFO L124 PetriNetUnfolderBase]: 5406/9297 cut-off events. [2023-11-29 01:58:30,331 INFO L125 PetriNetUnfolderBase]: For 616393/616393 co-relation queries the response was YES. [2023-11-29 01:58:30,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117245 conditions, 9297 events. 5406/9297 cut-off events. For 616393/616393 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 62673 event pairs, 265 based on Foata normal form. 24/9320 useless extension candidates. Maximal degree in co-relation 117079. Up to 6922 conditions per place. [2023-11-29 01:58:30,505 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 1282 selfloop transitions, 251 changer transitions 3/1542 dead transitions. [2023-11-29 01:58:30,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 1542 transitions, 45788 flow [2023-11-29 01:58:30,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 01:58:30,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 01:58:30,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 432 transitions. [2023-11-29 01:58:30,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.631578947368421 [2023-11-29 01:58:30,507 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 432 transitions. [2023-11-29 01:58:30,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 432 transitions. [2023-11-29 01:58:30,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:58:30,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 432 transitions. [2023-11-29 01:58:30,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 22.736842105263158) internal successors, (432), 19 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 01:58:30,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 36.0) internal successors, (720), 20 states have internal predecessors, (720), 0 states have call successors, (0), 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 01:58:30,511 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 36.0) internal successors, (720), 20 states have internal predecessors, (720), 0 states have call successors, (0), 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 01:58:30,511 INFO L175 Difference]: Start difference. First operand has 433 places, 1377 transitions, 38498 flow. Second operand 19 states and 432 transitions. [2023-11-29 01:58:30,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 1542 transitions, 45788 flow [2023-11-29 01:58:36,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1542 transitions, 45522 flow, removed 78 selfloop flow, removed 9 redundant places. [2023-11-29 01:58:36,558 INFO L231 Difference]: Finished difference. Result has 448 places, 1429 transitions, 40529 flow [2023-11-29 01:58:36,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=38240, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=40529, PETRI_PLACES=448, PETRI_TRANSITIONS=1429} [2023-11-29 01:58:36,560 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 410 predicate places. [2023-11-29 01:58:36,560 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 1429 transitions, 40529 flow [2023-11-29 01:58:36,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 19.238095238095237) internal successors, (404), 21 states have internal predecessors, (404), 0 states have call successors, (0), 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 01:58:36,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:58:36,560 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 01:58:36,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 01:58:36,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:36,761 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 01:58:36,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:36,761 INFO L85 PathProgramCache]: Analyzing trace with hash -817940675, now seen corresponding path program 15 times [2023-11-29 01:58:36,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:36,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376165799] [2023-11-29 01:58:36,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:36,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:36,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:36,884 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 01:58:36,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:36,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376165799] [2023-11-29 01:58:36,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376165799] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:36,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206015315] [2023-11-29 01:58:36,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:58:36,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:36,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:36,886 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:36,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 01:58:36,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 01:58:36,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:58:36,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:58:36,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:37,103 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 01:58:37,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:58:37,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206015315] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:37,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:58:37,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-11-29 01:58:37,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034812494] [2023-11-29 01:58:37,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:37,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 01:58:37,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:37,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 01:58:37,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:58:37,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 01:58:37,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 1429 transitions, 40529 flow. Second operand has 19 states, 19 states have (on average 19.42105263157895) internal successors, (369), 19 states have internal predecessors, (369), 0 states have call successors, (0), 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 01:58:37,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:58:37,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 01:58:37,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:58:44,127 INFO L124 PetriNetUnfolderBase]: 5729/9876 cut-off events. [2023-11-29 01:58:44,127 INFO L125 PetriNetUnfolderBase]: For 720945/720945 co-relation queries the response was YES. [2023-11-29 01:58:44,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128823 conditions, 9876 events. 5729/9876 cut-off events. For 720945/720945 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 67398 event pairs, 86 based on Foata normal form. 75/9950 useless extension candidates. Maximal degree in co-relation 128652. Up to 4082 conditions per place. [2023-11-29 01:58:44,320 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 774 selfloop transitions, 881 changer transitions 1/1662 dead transitions. [2023-11-29 01:58:44,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 1662 transitions, 49507 flow [2023-11-29 01:58:44,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 01:58:44,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 01:58:44,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 563 transitions. [2023-11-29 01:58:44,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6255555555555555 [2023-11-29 01:58:44,322 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 563 transitions. [2023-11-29 01:58:44,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 563 transitions. [2023-11-29 01:58:44,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:58:44,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 563 transitions. [2023-11-29 01:58:44,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 22.52) internal successors, (563), 25 states have internal predecessors, (563), 0 states have call successors, (0), 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 01:58:44,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 36.0) internal successors, (936), 26 states have internal predecessors, (936), 0 states have call successors, (0), 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 01:58:44,324 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 36.0) internal successors, (936), 26 states have internal predecessors, (936), 0 states have call successors, (0), 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 01:58:44,325 INFO L175 Difference]: Start difference. First operand has 448 places, 1429 transitions, 40529 flow. Second operand 25 states and 563 transitions. [2023-11-29 01:58:44,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 1662 transitions, 49507 flow [2023-11-29 01:58:51,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 1662 transitions, 49084 flow, removed 158 selfloop flow, removed 9 redundant places. [2023-11-29 01:58:51,476 INFO L231 Difference]: Finished difference. Result has 470 places, 1503 transitions, 45797 flow [2023-11-29 01:58:51,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=40013, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=812, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=45797, PETRI_PLACES=470, PETRI_TRANSITIONS=1503} [2023-11-29 01:58:51,477 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 432 predicate places. [2023-11-29 01:58:51,477 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 1503 transitions, 45797 flow [2023-11-29 01:58:51,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.42105263157895) internal successors, (369), 19 states have internal predecessors, (369), 0 states have call successors, (0), 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 01:58:51,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:58:51,478 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 01:58:51,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 01:58:51,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:51,678 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 01:58:51,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:51,679 INFO L85 PathProgramCache]: Analyzing trace with hash 944880433, now seen corresponding path program 16 times [2023-11-29 01:58:51,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:51,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135113454] [2023-11-29 01:58:51,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:51,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:51,788 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 01:58:51,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:51,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135113454] [2023-11-29 01:58:51,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135113454] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:51,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864789547] [2023-11-29 01:58:51,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:58:51,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:51,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:51,790 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:51,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 01:58:51,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:58:51,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:58:51,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 01:58:51,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:51,939 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 01:58:51,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:52,116 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 01:58:52,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864789547] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:52,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:58:52,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 11 [2023-11-29 01:58:52,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267469511] [2023-11-29 01:58:52,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:52,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 01:58:52,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:52,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 01:58:52,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:58:52,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-29 01:58:52,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 1503 transitions, 45797 flow. Second operand has 12 states, 12 states have (on average 21.416666666666668) internal successors, (257), 12 states have internal predecessors, (257), 0 states have call successors, (0), 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 01:58:52,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:58:52,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-29 01:58:52,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:04,960 INFO L124 PetriNetUnfolderBase]: 10743/19138 cut-off events. [2023-11-29 01:59:04,960 INFO L125 PetriNetUnfolderBase]: For 1613849/1614339 co-relation queries the response was YES. [2023-11-29 01:59:05,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269291 conditions, 19138 events. 10743/19138 cut-off events. For 1613849/1614339 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 153085 event pairs, 347 based on Foata normal form. 52/19055 useless extension candidates. Maximal degree in co-relation 269113. Up to 5072 conditions per place. [2023-11-29 01:59:05,555 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 1456 selfloop transitions, 1633 changer transitions 370/3532 dead transitions. [2023-11-29 01:59:05,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 3532 transitions, 116647 flow [2023-11-29 01:59:05,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 01:59:05,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 01:59:05,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2023-11-29 01:59:05,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7561728395061729 [2023-11-29 01:59:05,557 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 245 transitions. [2023-11-29 01:59:05,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 245 transitions. [2023-11-29 01:59:05,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:05,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 245 transitions. [2023-11-29 01:59:05,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 27.22222222222222) internal successors, (245), 9 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:05,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 36.0) internal successors, (360), 10 states have internal predecessors, (360), 0 states have call successors, (0), 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 01:59:05,559 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 36.0) internal successors, (360), 10 states have internal predecessors, (360), 0 states have call successors, (0), 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 01:59:05,559 INFO L175 Difference]: Start difference. First operand has 470 places, 1503 transitions, 45797 flow. Second operand 9 states and 245 transitions. [2023-11-29 01:59:05,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 3532 transitions, 116647 flow [2023-11-29 01:59:30,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 3532 transitions, 115868 flow, removed 234 selfloop flow, removed 16 redundant places. [2023-11-29 01:59:30,342 INFO L231 Difference]: Finished difference. Result has 467 places, 2556 transitions, 87710 flow [2023-11-29 01:59:30,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=45426, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=767, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=87710, PETRI_PLACES=467, PETRI_TRANSITIONS=2556} [2023-11-29 01:59:30,344 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 429 predicate places. [2023-11-29 01:59:30,344 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 2556 transitions, 87710 flow [2023-11-29 01:59:30,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.416666666666668) internal successors, (257), 12 states have internal predecessors, (257), 0 states have call successors, (0), 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 01:59:30,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:30,345 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 01:59:30,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 01:59:30,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 01:59:30,545 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 01:59:30,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:30,545 INFO L85 PathProgramCache]: Analyzing trace with hash 2068091087, now seen corresponding path program 17 times [2023-11-29 01:59:30,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:30,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411979789] [2023-11-29 01:59:30,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:30,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:30,717 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 01:59:30,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:30,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411979789] [2023-11-29 01:59:30,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411979789] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:30,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128060592] [2023-11-29 01:59:30,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:59:30,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:30,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:30,719 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:30,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 01:59:30,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 01:59:30,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:59:30,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:59:30,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:30,857 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 01:59:30,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:30,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128060592] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:59:30,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:59:30,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2023-11-29 01:59:30,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845503035] [2023-11-29 01:59:30,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:30,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:59:30,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:30,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:59:30,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:59:30,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 01:59:30,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 2556 transitions, 87710 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 01:59:30,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:30,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 01:59:30,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:55,553 INFO L124 PetriNetUnfolderBase]: 12098/20832 cut-off events. [2023-11-29 01:59:55,553 INFO L125 PetriNetUnfolderBase]: For 1832177/1832177 co-relation queries the response was YES. [2023-11-29 01:59:55,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301693 conditions, 20832 events. 12098/20832 cut-off events. For 1832177/1832177 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 159914 event pairs, 364 based on Foata normal form. 90/20922 useless extension candidates. Maximal degree in co-relation 301513. Up to 8932 conditions per place. [2023-11-29 01:59:56,139 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 1104 selfloop transitions, 1810 changer transitions 82/3002 dead transitions. [2023-11-29 01:59:56,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 3002 transitions, 105610 flow [2023-11-29 01:59:56,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 01:59:56,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 01:59:56,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 410 transitions. [2023-11-29 01:59:56,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6699346405228758 [2023-11-29 01:59:56,140 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 410 transitions. [2023-11-29 01:59:56,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 410 transitions. [2023-11-29 01:59:56,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:56,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 410 transitions. [2023-11-29 01:59:56,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 24.11764705882353) internal successors, (410), 17 states have internal predecessors, (410), 0 states have call successors, (0), 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 01:59:56,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 36.0) internal successors, (648), 18 states have internal predecessors, (648), 0 states have call successors, (0), 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 01:59:56,143 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 36.0) internal successors, (648), 18 states have internal predecessors, (648), 0 states have call successors, (0), 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 01:59:56,143 INFO L175 Difference]: Start difference. First operand has 467 places, 2556 transitions, 87710 flow. Second operand 17 states and 410 transitions. [2023-11-29 01:59:56,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 3002 transitions, 105610 flow [2023-11-29 02:00:25,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 3002 transitions, 104711 flow, removed 444 selfloop flow, removed 2 redundant places. [2023-11-29 02:00:25,851 INFO L231 Difference]: Finished difference. Result has 486 places, 2692 transitions, 98418 flow [2023-11-29 02:00:25,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=86903, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1685, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=821, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=98418, PETRI_PLACES=486, PETRI_TRANSITIONS=2692} [2023-11-29 02:00:25,854 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 448 predicate places. [2023-11-29 02:00:25,854 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 2692 transitions, 98418 flow [2023-11-29 02:00:25,854 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 02:00:25,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:25,854 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:25,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 02:00:26,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 02:00:26,055 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 02:00:26,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:26,055 INFO L85 PathProgramCache]: Analyzing trace with hash 535356310, now seen corresponding path program 18 times [2023-11-29 02:00:26,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:26,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461235585] [2023-11-29 02:00:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:26,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:26,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:26,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461235585] [2023-11-29 02:00:26,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461235585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:00:26,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292156749] [2023-11-29 02:00:26,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:00:26,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:26,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:26,295 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:26,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 02:00:26,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 02:00:26,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:00:26,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:00:26,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:26,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:00:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:26,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292156749] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:00:26,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:00:26,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 26 [2023-11-29 02:00:26,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89703704] [2023-11-29 02:00:26,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:00:26,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 02:00:26,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:26,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 02:00:26,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:00:26,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 02:00:26,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 2692 transitions, 98418 flow. Second operand has 26 states, 26 states have (on average 19.423076923076923) internal successors, (505), 26 states have internal predecessors, (505), 0 states have call successors, (0), 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 02:00:26,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:26,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 02:00:26,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:01:02,592 INFO L124 PetriNetUnfolderBase]: 16614/28506 cut-off events. [2023-11-29 02:01:02,592 INFO L125 PetriNetUnfolderBase]: For 2664853/2664853 co-relation queries the response was YES. [2023-11-29 02:01:03,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428453 conditions, 28506 events. 16614/28506 cut-off events. For 2664853/2664853 co-relation queries the response was YES. Maximal size of possible extension queue 1217. Compared 227322 event pairs, 198 based on Foata normal form. 220/28726 useless extension candidates. Maximal degree in co-relation 428268. Up to 5143 conditions per place. [2023-11-29 02:01:03,502 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 1108 selfloop transitions, 3568 changer transitions 251/4933 dead transitions. [2023-11-29 02:01:03,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 4933 transitions, 179140 flow [2023-11-29 02:01:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-29 02:01:03,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-11-29 02:01:03,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 1313 transitions. [2023-11-29 02:01:03,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6288314176245211 [2023-11-29 02:01:03,505 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 1313 transitions. [2023-11-29 02:01:03,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 1313 transitions. [2023-11-29 02:01:03,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:01:03,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 1313 transitions. [2023-11-29 02:01:03,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 22.637931034482758) internal successors, (1313), 58 states have internal predecessors, (1313), 0 states have call successors, (0), 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 02:01:03,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 36.0) internal successors, (2124), 59 states have internal predecessors, (2124), 0 states have call successors, (0), 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 02:01:03,510 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 36.0) internal successors, (2124), 59 states have internal predecessors, (2124), 0 states have call successors, (0), 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 02:01:03,510 INFO L175 Difference]: Start difference. First operand has 486 places, 2692 transitions, 98418 flow. Second operand 58 states and 1313 transitions. [2023-11-29 02:01:03,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 4933 transitions, 179140 flow [2023-11-29 02:02:01,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 4933 transitions, 178052 flow, removed 97 selfloop flow, removed 8 redundant places. [2023-11-29 02:02:01,523 INFO L231 Difference]: Finished difference. Result has 566 places, 4014 transitions, 158899 flow [2023-11-29 02:02:01,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=97445, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=158899, PETRI_PLACES=566, PETRI_TRANSITIONS=4014} [2023-11-29 02:02:01,526 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 528 predicate places. [2023-11-29 02:02:01,526 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 4014 transitions, 158899 flow [2023-11-29 02:02:01,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 19.423076923076923) internal successors, (505), 26 states have internal predecessors, (505), 0 states have call successors, (0), 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 02:02:01,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:02:01,526 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:02:01,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 02:02:01,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 02:02:01,727 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 02:02:01,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:02:01,727 INFO L85 PathProgramCache]: Analyzing trace with hash -3097806, now seen corresponding path program 19 times [2023-11-29 02:02:01,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:02:01,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88848349] [2023-11-29 02:02:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:02:01,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:02:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:02:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:02:01,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:02:01,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88848349] [2023-11-29 02:02:01,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88848349] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:02:01,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535337604] [2023-11-29 02:02:01,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:02:01,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:02:01,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:02:01,940 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:02:01,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 02:02:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:02:02,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:02:02,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:02:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:02:02,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:02:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:02:02,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535337604] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:02:02,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:02:02,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2023-11-29 02:02:02,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508853243] [2023-11-29 02:02:02,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:02:02,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 02:02:02,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:02:02,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 02:02:02,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2023-11-29 02:02:02,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 02:02:02,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 4014 transitions, 158899 flow. Second operand has 28 states, 28 states have (on average 19.392857142857142) internal successors, (543), 28 states have internal predecessors, (543), 0 states have call successors, (0), 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 02:02:02,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:02:02,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 02:02:02,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:03:07,930 INFO L124 PetriNetUnfolderBase]: 19646/33892 cut-off events. [2023-11-29 02:03:07,930 INFO L125 PetriNetUnfolderBase]: For 4134291/4134292 co-relation queries the response was YES. [2023-11-29 02:03:08,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569302 conditions, 33892 events. 19646/33892 cut-off events. For 4134291/4134292 co-relation queries the response was YES. Maximal size of possible extension queue 1308. Compared 277320 event pairs, 221 based on Foata normal form. 231/34123 useless extension candidates. Maximal degree in co-relation 569087. Up to 6086 conditions per place. [2023-11-29 02:03:09,028 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 1107 selfloop transitions, 4400 changer transitions 20/5533 dead transitions. [2023-11-29 02:03:09,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 5533 transitions, 226387 flow [2023-11-29 02:03:09,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-29 02:03:09,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-29 02:03:09,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 931 transitions. [2023-11-29 02:03:09,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307588075880759 [2023-11-29 02:03:09,031 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 931 transitions. [2023-11-29 02:03:09,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 931 transitions. [2023-11-29 02:03:09,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:03:09,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 931 transitions. [2023-11-29 02:03:09,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 22.70731707317073) internal successors, (931), 41 states have internal predecessors, (931), 0 states have call successors, (0), 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 02:03:09,035 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 02:03:09,035 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 02:03:09,035 INFO L175 Difference]: Start difference. First operand has 566 places, 4014 transitions, 158899 flow. Second operand 41 states and 931 transitions. [2023-11-29 02:03:09,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 5533 transitions, 226387 flow [2023-11-29 02:04:55,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 5533 transitions, 223076 flow, removed 887 selfloop flow, removed 12 redundant places. [2023-11-29 02:04:55,933 INFO L231 Difference]: Finished difference. Result has 606 places, 5067 transitions, 215640 flow [2023-11-29 02:04:55,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=156177, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4014, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=215640, PETRI_PLACES=606, PETRI_TRANSITIONS=5067} [2023-11-29 02:04:55,937 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 568 predicate places. [2023-11-29 02:04:55,937 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 5067 transitions, 215640 flow [2023-11-29 02:04:55,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 19.392857142857142) internal successors, (543), 28 states have internal predecessors, (543), 0 states have call successors, (0), 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 02:04:55,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:04:55,938 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:04:55,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 02:04:56,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:04:56,139 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:04:56,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:04:56,139 INFO L85 PathProgramCache]: Analyzing trace with hash -381446246, now seen corresponding path program 20 times [2023-11-29 02:04:56,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:04:56,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264874104] [2023-11-29 02:04:56,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:04:56,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:04:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:04:56,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:04:56,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:04:56,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264874104] [2023-11-29 02:04:56,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264874104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:04:56,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572884920] [2023-11-29 02:04:56,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:04:56,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:04:56,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:04:56,334 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:04:56,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 02:04:56,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:04:56,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:04:56,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:04:56,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:04:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:04:56,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:04:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:04:56,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572884920] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:04:56,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:04:56,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 29 [2023-11-29 02:04:56,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659899753] [2023-11-29 02:04:56,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:04:56,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:04:56,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:04:56,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:04:56,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:04:56,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 02:04:56,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 5067 transitions, 215640 flow. Second operand has 29 states, 29 states have (on average 19.275862068965516) internal successors, (559), 29 states have internal predecessors, (559), 0 states have call successors, (0), 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 02:04:56,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:04:56,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 02:04:56,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:06:53,193 INFO L124 PetriNetUnfolderBase]: 24735/42536 cut-off events. [2023-11-29 02:06:53,194 INFO L125 PetriNetUnfolderBase]: For 5675356/5675357 co-relation queries the response was YES. [2023-11-29 02:06:54,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 749979 conditions, 42536 events. 24735/42536 cut-off events. For 5675356/5675357 co-relation queries the response was YES. Maximal size of possible extension queue 1465. Compared 355871 event pairs, 295 based on Foata normal form. 516/43052 useless extension candidates. Maximal degree in co-relation 749753. Up to 7603 conditions per place. [2023-11-29 02:06:54,586 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 1508 selfloop transitions, 5719 changer transitions 59/7292 dead transitions. [2023-11-29 02:06:54,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 7292 transitions, 321403 flow [2023-11-29 02:06:54,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-29 02:06:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-11-29 02:06:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 1829 transitions. [2023-11-29 02:06:54,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6272290809327846 [2023-11-29 02:06:54,589 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 1829 transitions. [2023-11-29 02:06:54,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 1829 transitions. [2023-11-29 02:06:54,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:06:54,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 1829 transitions. [2023-11-29 02:06:54,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 22.580246913580247) internal successors, (1829), 81 states have internal predecessors, (1829), 0 states have call successors, (0), 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 02:06:54,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 36.0) internal successors, (2952), 82 states have internal predecessors, (2952), 0 states have call successors, (0), 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 02:06:54,594 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 36.0) internal successors, (2952), 82 states have internal predecessors, (2952), 0 states have call successors, (0), 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 02:06:54,594 INFO L175 Difference]: Start difference. First operand has 606 places, 5067 transitions, 215640 flow. Second operand 81 states and 1829 transitions. [2023-11-29 02:06:54,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 7292 transitions, 321403 flow [2023-11-29 02:10:44,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 675 places, 7292 transitions, 320481 flow, removed 276 selfloop flow, removed 11 redundant places. [2023-11-29 02:10:44,454 INFO L231 Difference]: Finished difference. Result has 717 places, 6726 transitions, 309051 flow [2023-11-29 02:10:44,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=214929, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5066, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=309051, PETRI_PLACES=717, PETRI_TRANSITIONS=6726} [2023-11-29 02:10:44,458 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 679 predicate places. [2023-11-29 02:10:44,458 INFO L495 AbstractCegarLoop]: Abstraction has has 717 places, 6726 transitions, 309051 flow [2023-11-29 02:10:44,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 19.275862068965516) internal successors, (559), 29 states have internal predecessors, (559), 0 states have call successors, (0), 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 02:10:44,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:10:44,458 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:10:44,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-29 02:10:44,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:44,659 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 02:10:44,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:44,659 INFO L85 PathProgramCache]: Analyzing trace with hash 751791200, now seen corresponding path program 21 times [2023-11-29 02:10:44,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:44,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951880206] [2023-11-29 02:10:44,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:44,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:10:44,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:44,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951880206] [2023-11-29 02:10:44,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951880206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:10:44,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47105828] [2023-11-29 02:10:44,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:10:44,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:44,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:44,832 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:44,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c296ef6-01dd-45fc-a752-840546f55869/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 02:10:44,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 02:10:44,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:10:44,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:10:44,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:10:45,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:10:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:10:45,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47105828] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:10:45,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:10:45,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 28 [2023-11-29 02:10:45,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13060959] [2023-11-29 02:10:45,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:10:45,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 02:10:45,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:45,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 02:10:45,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2023-11-29 02:10:45,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-29 02:10:45,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 717 places, 6726 transitions, 309051 flow. Second operand has 28 states, 28 states have (on average 19.107142857142858) internal successors, (535), 28 states have internal predecessors, (535), 0 states have call successors, (0), 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 02:10:45,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:10:45,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-29 02:10:45,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand