./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/fibonacci.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/fibonacci.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl --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 115f061be4541a19227bc1624a8b38d08b679b43ee58fd41d4a05fa6a8fd007e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:15:45,229 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:15:45,350 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:15:45,360 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:15:45,360 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:15:45,402 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:15:45,403 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:15:45,403 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:15:45,404 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:15:45,409 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:15:45,410 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:15:45,411 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:15:45,411 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:15:45,413 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:15:45,414 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:15:45,414 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:15:45,415 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:15:45,415 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:15:45,415 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:15:45,416 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:15:45,417 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:15:45,417 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:15:45,418 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:15:45,418 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:15:45,418 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:15:45,419 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:15:45,420 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:15:45,420 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:15:45,421 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:15:45,421 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:15:45,422 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:15:45,423 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:15:45,423 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:15:45,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:15:45,424 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:15:45,424 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:15:45,424 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:15:45,424 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:15:45,425 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_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 115f061be4541a19227bc1624a8b38d08b679b43ee58fd41d4a05fa6a8fd007e [2023-11-12 02:15:45,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:15:45,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:15:45,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:15:45,795 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:15:45,796 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:15:45,797 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/fibonacci.wvr.c [2023-11-12 02:15:48,914 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:15:49,173 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:15:49,174 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/sv-benchmarks/c/weaver/fibonacci.wvr.c [2023-11-12 02:15:49,186 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/data/e2691841f/12cee27056f841e5a47d0556a479885d/FLAGaf331414e [2023-11-12 02:15:49,208 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/data/e2691841f/12cee27056f841e5a47d0556a479885d [2023-11-12 02:15:49,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:15:49,213 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:15:49,214 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:15:49,215 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:15:49,223 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:15:49,224 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:15:49" (1/1) ... [2023-11-12 02:15:49,225 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e8e8225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:49, skipping insertion in model container [2023-11-12 02:15:49,226 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:15:49" (1/1) ... [2023-11-12 02:15:49,253 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:15:49,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:15:49,550 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:15:49,600 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:15:49,619 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:15:49,620 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:49 WrapperNode [2023-11-12 02:15:49,620 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:15:49,621 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:15:49,622 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:15:49,622 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:15:49,631 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:49" (1/1) ... [2023-11-12 02:15:49,651 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:49" (1/1) ... [2023-11-12 02:15:49,707 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 174 [2023-11-12 02:15:49,707 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:15:49,708 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:15:49,708 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:15:49,708 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:15:49,728 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:49" (1/1) ... [2023-11-12 02:15:49,746 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:49" (1/1) ... [2023-11-12 02:15:49,749 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:49" (1/1) ... [2023-11-12 02:15:49,750 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:49" (1/1) ... [2023-11-12 02:15:49,766 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:49" (1/1) ... [2023-11-12 02:15:49,783 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:49" (1/1) ... [2023-11-12 02:15:49,800 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:49" (1/1) ... [2023-11-12 02:15:49,802 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:49" (1/1) ... [2023-11-12 02:15:49,813 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:15:49,815 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:15:49,815 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:15:49,815 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:15:49,816 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:49" (1/1) ... [2023-11-12 02:15:49,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:15:49,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:49,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:15:49,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:15:49,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:15:49,920 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:15:49,920 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:15:49,920 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:15:49,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:15:49,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:15:49,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:15:49,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:15:49,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:15:49,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:15:49,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:15:49,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:15:49,923 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:15:50,039 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:15:50,042 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:15:50,476 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:15:50,488 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:15:50,489 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:15:50,491 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:15:50 BoogieIcfgContainer [2023-11-12 02:15:50,492 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:15:50,494 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:15:50,494 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:15:50,498 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:15:50,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:15:49" (1/3) ... [2023-11-12 02:15:50,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e9ddb20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:15:50, skipping insertion in model container [2023-11-12 02:15:50,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:49" (2/3) ... [2023-11-12 02:15:50,500 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e9ddb20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:15:50, skipping insertion in model container [2023-11-12 02:15:50,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:15:50" (3/3) ... [2023-11-12 02:15:50,501 INFO L112 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.c [2023-11-12 02:15:50,521 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:15:50,521 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-12 02:15:50,521 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:15:50,670 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:15:50,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 242 transitions, 498 flow [2023-11-12 02:15:50,822 INFO L124 PetriNetUnfolderBase]: 14/240 cut-off events. [2023-11-12 02:15:50,823 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:15:50,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 240 events. 14/240 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 413 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 151. Up to 2 conditions per place. [2023-11-12 02:15:50,833 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 242 transitions, 498 flow [2023-11-12 02:15:50,841 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 235 transitions, 482 flow [2023-11-12 02:15:50,845 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:15:50,856 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 228 places, 235 transitions, 482 flow [2023-11-12 02:15:50,858 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 228 places, 235 transitions, 482 flow [2023-11-12 02:15:50,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 235 transitions, 482 flow [2023-11-12 02:15:50,957 INFO L124 PetriNetUnfolderBase]: 14/235 cut-off events. [2023-11-12 02:15:50,958 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:15:50,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 235 events. 14/235 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 392 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 151. Up to 2 conditions per place. [2023-11-12 02:15:50,974 INFO L119 LiptonReduction]: Number of co-enabled transitions 12376 [2023-11-12 02:15:59,737 INFO L134 LiptonReduction]: Checked pairs total: 10525 [2023-11-12 02:15:59,738 INFO L136 LiptonReduction]: Total number of compositions: 272 [2023-11-12 02:15:59,771 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:15:59,778 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;@26029cf6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:15:59,779 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-12 02:15:59,780 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:15:59,780 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-12 02:15:59,780 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:15:59,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:15:59,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-12 02:15:59,781 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:15:59,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:59,786 INFO L85 PathProgramCache]: Analyzing trace with hash 986, now seen corresponding path program 1 times [2023-11-12 02:15:59,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:59,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425488702] [2023-11-12 02:15:59,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:59,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:15:59,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:59,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425488702] [2023-11-12 02:15:59,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425488702] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:59,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:59,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-12 02:15:59,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147114446] [2023-11-12 02:15:59,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:59,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:15:59,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:59,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:15:59,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:15:59,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 514 [2023-11-12 02:15:59,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 225.5) internal successors, (451), 2 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:59,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:15:59,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 514 [2023-11-12 02:15:59,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:00,015 INFO L124 PetriNetUnfolderBase]: 88/151 cut-off events. [2023-11-12 02:16:00,015 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-12 02:16:00,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 151 events. 88/151 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 381 event pairs, 56 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 252. Up to 152 conditions per place. [2023-11-12 02:16:00,018 INFO L140 encePairwiseOnDemand]: 511/514 looper letters, 21 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-11-12 02:16:00,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 96 flow [2023-11-12 02:16:00,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:16:00,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:16:00,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 474 transitions. [2023-11-12 02:16:00,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46108949416342415 [2023-11-12 02:16:00,038 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 474 transitions. [2023-11-12 02:16:00,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 474 transitions. [2023-11-12 02:16:00,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:00,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 474 transitions. [2023-11-12 02:16:00,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 237.0) internal successors, (474), 2 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 514.0) internal successors, (1542), 3 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,056 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 514.0) internal successors, (1542), 3 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,058 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 474 transitions. [2023-11-12 02:16:00,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 96 flow [2023-11-12 02:16:00,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:16:00,064 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-11-12 02:16:00,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-11-12 02:16:00,070 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-12 02:16:00,070 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-11-12 02:16:00,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 225.5) internal successors, (451), 2 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:00,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:16:00,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:16:00,072 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:16:00,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:00,073 INFO L85 PathProgramCache]: Analyzing trace with hash 968669, now seen corresponding path program 1 times [2023-11-12 02:16:00,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:00,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368847730] [2023-11-12 02:16:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:00,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:00,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:00,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368847730] [2023-11-12 02:16:00,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368847730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:00,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:00,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:16:00,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831857068] [2023-11-12 02:16:00,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:00,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:16:00,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:00,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:16:00,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:16:00,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 514 [2023-11-12 02:16:00,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:00,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 514 [2023-11-12 02:16:00,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:00,503 INFO L124 PetriNetUnfolderBase]: 82/139 cut-off events. [2023-11-12 02:16:00,503 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:16:00,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 139 events. 82/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 345 event pairs, 52 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 282. Up to 139 conditions per place. [2023-11-12 02:16:00,505 INFO L140 encePairwiseOnDemand]: 511/514 looper letters, 18 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-11-12 02:16:00,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 80 flow [2023-11-12 02:16:00,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:16:00,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:16:00,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 669 transitions. [2023-11-12 02:16:00,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.433852140077821 [2023-11-12 02:16:00,511 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 669 transitions. [2023-11-12 02:16:00,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 669 transitions. [2023-11-12 02:16:00,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:00,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 669 transitions. [2023-11-12 02:16:00,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 514.0) internal successors, (2056), 4 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,522 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 514.0) internal successors, (2056), 4 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,523 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 669 transitions. [2023-11-12 02:16:00,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 80 flow [2023-11-12 02:16:00,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:16:00,524 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-11-12 02:16:00,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-11-12 02:16:00,526 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-12 02:16:00,526 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-11-12 02:16:00,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:00,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:16:00,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:16:00,528 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)] === [2023-11-12 02:16:00,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:00,529 INFO L85 PathProgramCache]: Analyzing trace with hash 968668, now seen corresponding path program 1 times [2023-11-12 02:16:00,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:00,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082265517] [2023-11-12 02:16:00,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:00,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:00,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:00,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082265517] [2023-11-12 02:16:00,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082265517] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:00,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:00,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:16:00,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469799994] [2023-11-12 02:16:00,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:00,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:16:00,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:00,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:16:00,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:16:00,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 514 [2023-11-12 02:16:00,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 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) [2023-11-12 02:16:00,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:00,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 514 [2023-11-12 02:16:00,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:00,771 INFO L124 PetriNetUnfolderBase]: 76/127 cut-off events. [2023-11-12 02:16:00,771 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:16:00,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 127 events. 76/127 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 299 event pairs, 48 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 259. Up to 127 conditions per place. [2023-11-12 02:16:00,773 INFO L140 encePairwiseOnDemand]: 511/514 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-11-12 02:16:00,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 74 flow [2023-11-12 02:16:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:16:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:16:00,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2023-11-12 02:16:00,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43060959792477305 [2023-11-12 02:16:00,790 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2023-11-12 02:16:00,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2023-11-12 02:16:00,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:00,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2023-11-12 02:16:00,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 514.0) internal successors, (2056), 4 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,801 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 514.0) internal successors, (2056), 4 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,801 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 664 transitions. [2023-11-12 02:16:00,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 74 flow [2023-11-12 02:16:00,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 73 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:16:00,803 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-11-12 02:16:00,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-11-12 02:16:00,805 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-12 02:16:00,805 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-11-12 02:16:00,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 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) [2023-11-12 02:16:00,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:00,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:16:00,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:16:00,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:16:00,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:00,812 INFO L85 PathProgramCache]: Analyzing trace with hash 930910975, now seen corresponding path program 1 times [2023-11-12 02:16:00,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:00,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316088705] [2023-11-12 02:16:00,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:00,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:00,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:00,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:00,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316088705] [2023-11-12 02:16:00,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316088705] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:00,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:00,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:16:00,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144574403] [2023-11-12 02:16:00,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:00,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:16:00,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:00,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:16:00,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:16:01,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 514 [2023-11-12 02:16:01,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 212.25) internal successors, (849), 4 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:01,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 514 [2023-11-12 02:16:01,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:01,132 INFO L124 PetriNetUnfolderBase]: 58/100 cut-off events. [2023-11-12 02:16:01,132 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:16:01,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 100 events. 58/100 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 210 event pairs, 36 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 206. Up to 100 conditions per place. [2023-11-12 02:16:01,134 INFO L140 encePairwiseOnDemand]: 512/514 looper letters, 15 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-11-12 02:16:01,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 71 flow [2023-11-12 02:16:01,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:16:01,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:16:01,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 650 transitions. [2023-11-12 02:16:01,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42153047989623865 [2023-11-12 02:16:01,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 650 transitions. [2023-11-12 02:16:01,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 650 transitions. [2023-11-12 02:16:01,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:01,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 650 transitions. [2023-11-12 02:16:01,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 514.0) internal successors, (2056), 4 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,148 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 514.0) internal successors, (2056), 4 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,149 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 650 transitions. [2023-11-12 02:16:01,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 71 flow [2023-11-12 02:16:01,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 70 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:16:01,150 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-11-12 02:16:01,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-11-12 02:16:01,154 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-12 02:16:01,154 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-11-12 02:16:01,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 212.25) internal successors, (849), 4 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:01,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:16:01,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:16:01,156 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:16:01,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:01,157 INFO L85 PathProgramCache]: Analyzing trace with hash 930910976, now seen corresponding path program 1 times [2023-11-12 02:16:01,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:01,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717928885] [2023-11-12 02:16:01,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:01,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:01,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:01,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717928885] [2023-11-12 02:16:01,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717928885] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:01,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:01,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:16:01,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838958021] [2023-11-12 02:16:01,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:01,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:16:01,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:01,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:16:01,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:16:01,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 514 [2023-11-12 02:16:01,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:01,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 514 [2023-11-12 02:16:01,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:01,334 INFO L124 PetriNetUnfolderBase]: 40/73 cut-off events. [2023-11-12 02:16:01,334 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:16:01,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 73 events. 40/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 129 event pairs, 24 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 153. Up to 73 conditions per place. [2023-11-12 02:16:01,343 INFO L140 encePairwiseOnDemand]: 512/514 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-11-12 02:16:01,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 68 flow [2023-11-12 02:16:01,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:16:01,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:16:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2023-11-12 02:16:01,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43060959792477305 [2023-11-12 02:16:01,356 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2023-11-12 02:16:01,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2023-11-12 02:16:01,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:01,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2023-11-12 02:16:01,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 514.0) internal successors, (2056), 4 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,367 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 514.0) internal successors, (2056), 4 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,368 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 664 transitions. [2023-11-12 02:16:01,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 68 flow [2023-11-12 02:16:01,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 67 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:16:01,370 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-11-12 02:16:01,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-11-12 02:16:01,373 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-12 02:16:01,374 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-11-12 02:16:01,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:01,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:01,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:16:01,378 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)] === [2023-11-12 02:16:01,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:01,380 INFO L85 PathProgramCache]: Analyzing trace with hash -294389519, now seen corresponding path program 1 times [2023-11-12 02:16:01,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:01,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351015317] [2023-11-12 02:16:01,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:01,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:01,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:01,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:01,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351015317] [2023-11-12 02:16:01,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351015317] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:01,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:01,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:16:01,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660701036] [2023-11-12 02:16:01,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:01,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:16:01,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:01,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:16:01,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:16:02,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 514 [2023-11-12 02:16:02,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 6 states, 6 states have (on average 211.16666666666666) internal successors, (1267), 6 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:02,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:02,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 514 [2023-11-12 02:16:02,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:02,178 INFO L124 PetriNetUnfolderBase]: 73/139 cut-off events. [2023-11-12 02:16:02,178 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:16:02,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 139 events. 73/139 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 397 event pairs, 11 based on Foata normal form. 1/108 useless extension candidates. Maximal degree in co-relation 288. Up to 79 conditions per place. [2023-11-12 02:16:02,179 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 28 selfloop transitions, 5 changer transitions 5/38 dead transitions. [2023-11-12 02:16:02,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 38 transitions, 167 flow [2023-11-12 02:16:02,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:16:02,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:16:02,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1084 transitions. [2023-11-12 02:16:02,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217898832684825 [2023-11-12 02:16:02,186 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1084 transitions. [2023-11-12 02:16:02,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1084 transitions. [2023-11-12 02:16:02,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:02,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1084 transitions. [2023-11-12 02:16:02,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 216.8) internal successors, (1084), 5 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:02,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:02,200 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:02,201 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 5 states and 1084 transitions. [2023-11-12 02:16:02,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 38 transitions, 167 flow [2023-11-12 02:16:02,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 38 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:16:02,203 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 72 flow [2023-11-12 02:16:02,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=72, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-11-12 02:16:02,204 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-11-12 02:16:02,204 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 72 flow [2023-11-12 02:16:02,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 211.16666666666666) internal successors, (1267), 6 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:02,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:02,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:02,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:16:02,206 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)] === [2023-11-12 02:16:02,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:02,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1856098595, now seen corresponding path program 2 times [2023-11-12 02:16:02,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:02,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081405492] [2023-11-12 02:16:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:02,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:02,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:02,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081405492] [2023-11-12 02:16:02,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081405492] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:02,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:02,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:16:02,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273288167] [2023-11-12 02:16:02,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:02,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:16:02,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:02,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:16:02,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:16:02,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 514 [2023-11-12 02:16:02,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 72 flow. Second operand has 5 states, 5 states have (on average 215.6) internal successors, (1078), 5 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:02,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:02,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 514 [2023-11-12 02:16:02,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:02,656 INFO L124 PetriNetUnfolderBase]: 70/130 cut-off events. [2023-11-12 02:16:02,656 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-11-12 02:16:02,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 130 events. 70/130 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 338 event pairs, 19 based on Foata normal form. 1/123 useless extension candidates. Maximal degree in co-relation 356. Up to 79 conditions per place. [2023-11-12 02:16:02,658 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 24 selfloop transitions, 6 changer transitions 5/35 dead transitions. [2023-11-12 02:16:02,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 187 flow [2023-11-12 02:16:02,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:16:02,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:16:02,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1100 transitions. [2023-11-12 02:16:02,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4280155642023346 [2023-11-12 02:16:02,664 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1100 transitions. [2023-11-12 02:16:02,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1100 transitions. [2023-11-12 02:16:02,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:02,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1100 transitions. [2023-11-12 02:16:02,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.0) internal successors, (1100), 5 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:02,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:02,678 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:02,678 INFO L175 Difference]: Start difference. First operand has 28 places, 19 transitions, 72 flow. Second operand 5 states and 1100 transitions. [2023-11-12 02:16:02,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 187 flow [2023-11-12 02:16:02,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 185 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:16:02,681 INFO L231 Difference]: Finished difference. Result has 33 places, 21 transitions, 104 flow [2023-11-12 02:16:02,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=104, PETRI_PLACES=33, PETRI_TRANSITIONS=21} [2023-11-12 02:16:02,683 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2023-11-12 02:16:02,683 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 21 transitions, 104 flow [2023-11-12 02:16:02,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 215.6) internal successors, (1078), 5 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:02,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:02,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:02,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:16:02,685 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)] === [2023-11-12 02:16:02,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:02,685 INFO L85 PathProgramCache]: Analyzing trace with hash 335689008, now seen corresponding path program 1 times [2023-11-12 02:16:02,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:02,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231264562] [2023-11-12 02:16:02,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:02,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:02,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:02,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231264562] [2023-11-12 02:16:02,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231264562] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:02,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71750770] [2023-11-12 02:16:02,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:02,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:02,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:02,831 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:02,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:16:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:02,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:16:02,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:03,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:03,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71750770] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:03,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:03,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-12 02:16:03,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935180203] [2023-11-12 02:16:03,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:03,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:16:03,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:03,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:16:03,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:16:03,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 514 [2023-11-12 02:16:03,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 21 transitions, 104 flow. Second operand has 10 states, 10 states have (on average 215.5) internal successors, (2155), 10 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:03,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:03,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 514 [2023-11-12 02:16:03,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:03,352 INFO L124 PetriNetUnfolderBase]: 109/184 cut-off events. [2023-11-12 02:16:03,353 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2023-11-12 02:16:03,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 597 conditions, 184 events. 109/184 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 537 event pairs, 23 based on Foata normal form. 12/178 useless extension candidates. Maximal degree in co-relation 587. Up to 91 conditions per place. [2023-11-12 02:16:03,355 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 40 selfloop transitions, 23 changer transitions 0/63 dead transitions. [2023-11-12 02:16:03,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 63 transitions, 396 flow [2023-11-12 02:16:03,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:16:03,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-12 02:16:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2189 transitions. [2023-11-12 02:16:03,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42587548638132294 [2023-11-12 02:16:03,364 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2189 transitions. [2023-11-12 02:16:03,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2189 transitions. [2023-11-12 02:16:03,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:03,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2189 transitions. [2023-11-12 02:16:03,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 218.9) internal successors, (2189), 10 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:03,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 514.0) internal successors, (5654), 11 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:03,386 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 514.0) internal successors, (5654), 11 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:03,386 INFO L175 Difference]: Start difference. First operand has 33 places, 21 transitions, 104 flow. Second operand 10 states and 2189 transitions. [2023-11-12 02:16:03,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 63 transitions, 396 flow [2023-11-12 02:16:03,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 63 transitions, 378 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-12 02:16:03,390 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 286 flow [2023-11-12 02:16:03,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=286, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-11-12 02:16:03,392 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2023-11-12 02:16:03,392 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 286 flow [2023-11-12 02:16:03,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 215.5) internal successors, (2155), 10 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:03,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:03,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:03,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:03,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:03,600 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)] === [2023-11-12 02:16:03,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:03,601 INFO L85 PathProgramCache]: Analyzing trace with hash -486540496, now seen corresponding path program 2 times [2023-11-12 02:16:03,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:03,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442677649] [2023-11-12 02:16:03,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:03,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:03,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:03,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442677649] [2023-11-12 02:16:03,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442677649] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:03,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286245882] [2023-11-12 02:16:03,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:16:03,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:03,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:03,694 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:03,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:16:03,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:16:03,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:03,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:16:03,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:03,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:03,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:03,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286245882] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:03,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:03,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-12 02:16:03,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94285734] [2023-11-12 02:16:03,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:03,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:16:03,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:03,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:16:03,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:16:03,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 514 [2023-11-12 02:16:03,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 286 flow. Second operand has 8 states, 8 states have (on average 215.5) internal successors, (1724), 8 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:03,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:03,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 514 [2023-11-12 02:16:03,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:04,102 INFO L124 PetriNetUnfolderBase]: 116/205 cut-off events. [2023-11-12 02:16:04,102 INFO L125 PetriNetUnfolderBase]: For 524/524 co-relation queries the response was YES. [2023-11-12 02:16:04,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 205 events. 116/205 cut-off events. For 524/524 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 636 event pairs, 18 based on Foata normal form. 6/207 useless extension candidates. Maximal degree in co-relation 866. Up to 64 conditions per place. [2023-11-12 02:16:04,105 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 48 selfloop transitions, 18 changer transitions 0/66 dead transitions. [2023-11-12 02:16:04,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 66 transitions, 536 flow [2023-11-12 02:16:04,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:16:04,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:16:04,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1540 transitions. [2023-11-12 02:16:04,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4280155642023346 [2023-11-12 02:16:04,113 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1540 transitions. [2023-11-12 02:16:04,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1540 transitions. [2023-11-12 02:16:04,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:04,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1540 transitions. [2023-11-12 02:16:04,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 220.0) internal successors, (1540), 7 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:04,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 514.0) internal successors, (4112), 8 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:04,127 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 514.0) internal successors, (4112), 8 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:04,127 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 286 flow. Second operand 7 states and 1540 transitions. [2023-11-12 02:16:04,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 66 transitions, 536 flow [2023-11-12 02:16:04,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 66 transitions, 494 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-11-12 02:16:04,138 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 299 flow [2023-11-12 02:16:04,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=299, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2023-11-12 02:16:04,140 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 25 predicate places. [2023-11-12 02:16:04,140 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 299 flow [2023-11-12 02:16:04,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 215.5) internal successors, (1724), 8 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:04,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:04,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:04,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:04,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:04,356 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)] === [2023-11-12 02:16:04,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:04,356 INFO L85 PathProgramCache]: Analyzing trace with hash -459386122, now seen corresponding path program 3 times [2023-11-12 02:16:04,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:04,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399917287] [2023-11-12 02:16:04,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:04,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:04,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:04,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399917287] [2023-11-12 02:16:04,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399917287] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:04,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:04,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:16:04,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938481193] [2023-11-12 02:16:04,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:04,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:16:04,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:04,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:16:04,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:16:04,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 514 [2023-11-12 02:16:04,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 299 flow. Second operand has 5 states, 5 states have (on average 216.8) internal successors, (1084), 5 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:04,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:04,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 514 [2023-11-12 02:16:04,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:04,605 INFO L124 PetriNetUnfolderBase]: 124/219 cut-off events. [2023-11-12 02:16:04,606 INFO L125 PetriNetUnfolderBase]: For 939/939 co-relation queries the response was YES. [2023-11-12 02:16:04,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 995 conditions, 219 events. 124/219 cut-off events. For 939/939 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 685 event pairs, 30 based on Foata normal form. 6/225 useless extension candidates. Maximal degree in co-relation 976. Up to 158 conditions per place. [2023-11-12 02:16:04,609 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 37 selfloop transitions, 22 changer transitions 0/59 dead transitions. [2023-11-12 02:16:04,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 59 transitions, 519 flow [2023-11-12 02:16:04,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:16:04,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:16:04,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1105 transitions. [2023-11-12 02:16:04,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42996108949416345 [2023-11-12 02:16:04,615 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1105 transitions. [2023-11-12 02:16:04,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1105 transitions. [2023-11-12 02:16:04,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:04,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1105 transitions. [2023-11-12 02:16:04,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 221.0) internal successors, (1105), 5 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:04,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:04,635 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:04,644 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 299 flow. Second operand 5 states and 1105 transitions. [2023-11-12 02:16:04,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 59 transitions, 519 flow [2023-11-12 02:16:04,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 478 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-12 02:16:04,651 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 401 flow [2023-11-12 02:16:04,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=401, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2023-11-12 02:16:04,653 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 27 predicate places. [2023-11-12 02:16:04,654 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 401 flow [2023-11-12 02:16:04,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 216.8) internal successors, (1084), 5 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:04,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:04,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:04,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 02:16:04,657 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)] === [2023-11-12 02:16:04,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:04,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1294939725, now seen corresponding path program 1 times [2023-11-12 02:16:04,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:04,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193420147] [2023-11-12 02:16:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:04,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:04,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:04,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193420147] [2023-11-12 02:16:04,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193420147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:04,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:04,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:16:04,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470317081] [2023-11-12 02:16:04,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:04,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:16:04,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:04,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:16:04,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:16:04,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 514 [2023-11-12 02:16:04,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 401 flow. Second operand has 5 states, 5 states have (on average 217.8) internal successors, (1089), 5 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:04,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:04,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 514 [2023-11-12 02:16:04,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:04,940 INFO L124 PetriNetUnfolderBase]: 123/222 cut-off events. [2023-11-12 02:16:04,940 INFO L125 PetriNetUnfolderBase]: For 897/897 co-relation queries the response was YES. [2023-11-12 02:16:04,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 222 events. 123/222 cut-off events. For 897/897 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 719 event pairs, 24 based on Foata normal form. 4/226 useless extension candidates. Maximal degree in co-relation 1062. Up to 142 conditions per place. [2023-11-12 02:16:04,943 INFO L140 encePairwiseOnDemand]: 509/514 looper letters, 49 selfloop transitions, 10 changer transitions 7/66 dead transitions. [2023-11-12 02:16:04,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 615 flow [2023-11-12 02:16:04,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:16:04,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:16:04,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1112 transitions. [2023-11-12 02:16:04,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43268482490272375 [2023-11-12 02:16:04,949 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1112 transitions. [2023-11-12 02:16:04,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1112 transitions. [2023-11-12 02:16:04,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:04,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1112 transitions. [2023-11-12 02:16:04,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 222.4) internal successors, (1112), 5 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:04,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:04,959 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:04,959 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 401 flow. Second operand 5 states and 1112 transitions. [2023-11-12 02:16:04,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 615 flow [2023-11-12 02:16:04,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 66 transitions, 573 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-11-12 02:16:04,969 INFO L231 Difference]: Finished difference. Result has 61 places, 48 transitions, 374 flow [2023-11-12 02:16:04,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=374, PETRI_PLACES=61, PETRI_TRANSITIONS=48} [2023-11-12 02:16:04,970 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 32 predicate places. [2023-11-12 02:16:04,971 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 48 transitions, 374 flow [2023-11-12 02:16:04,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 217.8) internal successors, (1089), 5 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:04,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:04,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:04,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 02:16:04,972 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)] === [2023-11-12 02:16:04,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:04,973 INFO L85 PathProgramCache]: Analyzing trace with hash 53404436, now seen corresponding path program 4 times [2023-11-12 02:16:04,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:04,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291538547] [2023-11-12 02:16:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:04,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:05,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:05,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291538547] [2023-11-12 02:16:05,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291538547] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:05,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:05,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:16:05,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606413000] [2023-11-12 02:16:05,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:05,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:16:05,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:05,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:16:05,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:16:05,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 514 [2023-11-12 02:16:05,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 374 flow. Second operand has 5 states, 5 states have (on average 217.8) internal successors, (1089), 5 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:05,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:05,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 514 [2023-11-12 02:16:05,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:05,244 INFO L124 PetriNetUnfolderBase]: 118/217 cut-off events. [2023-11-12 02:16:05,244 INFO L125 PetriNetUnfolderBase]: For 848/848 co-relation queries the response was YES. [2023-11-12 02:16:05,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 217 events. 118/217 cut-off events. For 848/848 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 683 event pairs, 29 based on Foata normal form. 2/219 useless extension candidates. Maximal degree in co-relation 997. Up to 137 conditions per place. [2023-11-12 02:16:05,248 INFO L140 encePairwiseOnDemand]: 509/514 looper letters, 41 selfloop transitions, 18 changer transitions 3/62 dead transitions. [2023-11-12 02:16:05,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 62 transitions, 560 flow [2023-11-12 02:16:05,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:16:05,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:16:05,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1108 transitions. [2023-11-12 02:16:05,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4311284046692607 [2023-11-12 02:16:05,254 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1108 transitions. [2023-11-12 02:16:05,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1108 transitions. [2023-11-12 02:16:05,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:05,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1108 transitions. [2023-11-12 02:16:05,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 221.6) internal successors, (1108), 5 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:05,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:05,264 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:05,264 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 374 flow. Second operand 5 states and 1108 transitions. [2023-11-12 02:16:05,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 62 transitions, 560 flow [2023-11-12 02:16:05,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 62 transitions, 530 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-12 02:16:05,272 INFO L231 Difference]: Finished difference. Result has 61 places, 47 transitions, 377 flow [2023-11-12 02:16:05,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=377, PETRI_PLACES=61, PETRI_TRANSITIONS=47} [2023-11-12 02:16:05,274 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 32 predicate places. [2023-11-12 02:16:05,275 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 47 transitions, 377 flow [2023-11-12 02:16:05,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 217.8) internal successors, (1089), 5 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:05,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:05,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:05,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 02:16:05,277 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)] === [2023-11-12 02:16:05,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:05,278 INFO L85 PathProgramCache]: Analyzing trace with hash 512642553, now seen corresponding path program 2 times [2023-11-12 02:16:05,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:05,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422595739] [2023-11-12 02:16:05,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:05,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:05,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:05,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422595739] [2023-11-12 02:16:05,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422595739] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:05,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581839357] [2023-11-12 02:16:05,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:16:05,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:05,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:05,353 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:05,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:16:05,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:16:05,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:05,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:16:05,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:05,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:05,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581839357] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:05,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:05,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-12 02:16:05,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331587431] [2023-11-12 02:16:05,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:05,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:16:05,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:05,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:16:05,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:16:05,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 514 [2023-11-12 02:16:05,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 47 transitions, 377 flow. Second operand has 8 states, 8 states have (on average 215.75) internal successors, (1726), 8 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:05,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:05,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 514 [2023-11-12 02:16:05,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:05,774 INFO L124 PetriNetUnfolderBase]: 122/221 cut-off events. [2023-11-12 02:16:05,774 INFO L125 PetriNetUnfolderBase]: For 793/793 co-relation queries the response was YES. [2023-11-12 02:16:05,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1063 conditions, 221 events. 122/221 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 698 event pairs, 12 based on Foata normal form. 4/225 useless extension candidates. Maximal degree in co-relation 1041. Up to 67 conditions per place. [2023-11-12 02:16:05,778 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 50 selfloop transitions, 24 changer transitions 0/74 dead transitions. [2023-11-12 02:16:05,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 74 transitions, 666 flow [2023-11-12 02:16:05,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:16:05,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:16:05,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1536 transitions. [2023-11-12 02:16:05,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42690383546414673 [2023-11-12 02:16:05,785 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1536 transitions. [2023-11-12 02:16:05,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1536 transitions. [2023-11-12 02:16:05,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:05,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1536 transitions. [2023-11-12 02:16:05,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 219.42857142857142) internal successors, (1536), 7 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:05,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 514.0) internal successors, (4112), 8 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:05,824 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 514.0) internal successors, (4112), 8 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:05,824 INFO L175 Difference]: Start difference. First operand has 61 places, 47 transitions, 377 flow. Second operand 7 states and 1536 transitions. [2023-11-12 02:16:05,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 74 transitions, 666 flow [2023-11-12 02:16:05,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 74 transitions, 619 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-11-12 02:16:05,832 INFO L231 Difference]: Finished difference. Result has 63 places, 52 transitions, 438 flow [2023-11-12 02:16:05,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=438, PETRI_PLACES=63, PETRI_TRANSITIONS=52} [2023-11-12 02:16:05,833 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2023-11-12 02:16:05,833 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 438 flow [2023-11-12 02:16:05,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 215.75) internal successors, (1726), 8 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:05,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:05,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:05,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:06,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:06,040 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)] === [2023-11-12 02:16:06,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:06,041 INFO L85 PathProgramCache]: Analyzing trace with hash 315713776, now seen corresponding path program 5 times [2023-11-12 02:16:06,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:06,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105502297] [2023-11-12 02:16:06,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:06,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:06,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:06,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105502297] [2023-11-12 02:16:06,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105502297] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:06,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:06,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:16:06,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898287139] [2023-11-12 02:16:06,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:06,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:16:06,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:06,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:16:06,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:16:06,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 514 [2023-11-12 02:16:06,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 52 transitions, 438 flow. Second operand has 5 states, 5 states have (on average 216.8) internal successors, (1084), 5 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:06,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:06,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 514 [2023-11-12 02:16:06,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:06,301 INFO L124 PetriNetUnfolderBase]: 121/222 cut-off events. [2023-11-12 02:16:06,302 INFO L125 PetriNetUnfolderBase]: For 1016/1016 co-relation queries the response was YES. [2023-11-12 02:16:06,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1104 conditions, 222 events. 121/222 cut-off events. For 1016/1016 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 719 event pairs, 34 based on Foata normal form. 2/224 useless extension candidates. Maximal degree in co-relation 1083. Up to 184 conditions per place. [2023-11-12 02:16:06,305 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 40 selfloop transitions, 16 changer transitions 2/58 dead transitions. [2023-11-12 02:16:06,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 583 flow [2023-11-12 02:16:06,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:16:06,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:16:06,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1100 transitions. [2023-11-12 02:16:06,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4280155642023346 [2023-11-12 02:16:06,311 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1100 transitions. [2023-11-12 02:16:06,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1100 transitions. [2023-11-12 02:16:06,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:06,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1100 transitions. [2023-11-12 02:16:06,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.0) internal successors, (1100), 5 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:06,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:06,322 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:06,322 INFO L175 Difference]: Start difference. First operand has 63 places, 52 transitions, 438 flow. Second operand 5 states and 1100 transitions. [2023-11-12 02:16:06,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 58 transitions, 583 flow [2023-11-12 02:16:06,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 58 transitions, 491 flow, removed 20 selfloop flow, removed 6 redundant places. [2023-11-12 02:16:06,329 INFO L231 Difference]: Finished difference. Result has 61 places, 51 transitions, 375 flow [2023-11-12 02:16:06,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=375, PETRI_PLACES=61, PETRI_TRANSITIONS=51} [2023-11-12 02:16:06,330 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 32 predicate places. [2023-11-12 02:16:06,331 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 51 transitions, 375 flow [2023-11-12 02:16:06,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 216.8) internal successors, (1084), 5 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:06,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:06,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:06,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 02:16:06,332 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)] === [2023-11-12 02:16:06,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:06,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1294457849, now seen corresponding path program 3 times [2023-11-12 02:16:06,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:06,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79137592] [2023-11-12 02:16:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:06,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:06,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:06,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79137592] [2023-11-12 02:16:06,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79137592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:06,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:06,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:16:06,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475550857] [2023-11-12 02:16:06,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:06,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:16:06,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:06,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:16:06,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:16:06,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 514 [2023-11-12 02:16:06,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 51 transitions, 375 flow. Second operand has 5 states, 5 states have (on average 216.8) internal successors, (1084), 5 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:06,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:06,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 514 [2023-11-12 02:16:06,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:06,555 INFO L124 PetriNetUnfolderBase]: 126/229 cut-off events. [2023-11-12 02:16:06,555 INFO L125 PetriNetUnfolderBase]: For 655/655 co-relation queries the response was YES. [2023-11-12 02:16:06,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 229 events. 126/229 cut-off events. For 655/655 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 739 event pairs, 36 based on Foata normal form. 4/233 useless extension candidates. Maximal degree in co-relation 1003. Up to 188 conditions per place. [2023-11-12 02:16:06,558 INFO L140 encePairwiseOnDemand]: 509/514 looper letters, 43 selfloop transitions, 17 changer transitions 0/60 dead transitions. [2023-11-12 02:16:06,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 60 transitions, 543 flow [2023-11-12 02:16:06,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:16:06,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:16:06,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1102 transitions. [2023-11-12 02:16:06,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4287937743190661 [2023-11-12 02:16:06,564 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1102 transitions. [2023-11-12 02:16:06,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1102 transitions. [2023-11-12 02:16:06,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:06,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1102 transitions. [2023-11-12 02:16:06,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.4) internal successors, (1102), 5 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:06,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:06,574 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:06,574 INFO L175 Difference]: Start difference. First operand has 61 places, 51 transitions, 375 flow. Second operand 5 states and 1102 transitions. [2023-11-12 02:16:06,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 60 transitions, 543 flow [2023-11-12 02:16:06,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 60 transitions, 509 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:16:06,581 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 386 flow [2023-11-12 02:16:06,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=386, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2023-11-12 02:16:06,582 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 32 predicate places. [2023-11-12 02:16:06,582 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 386 flow [2023-11-12 02:16:06,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 216.8) internal successors, (1084), 5 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:06,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:06,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:06,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-12 02:16:06,584 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)] === [2023-11-12 02:16:06,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:06,584 INFO L85 PathProgramCache]: Analyzing trace with hash -155700511, now seen corresponding path program 4 times [2023-11-12 02:16:06,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:06,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126418994] [2023-11-12 02:16:06,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:06,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:06,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:06,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126418994] [2023-11-12 02:16:06,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126418994] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:06,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:06,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:16:06,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019530769] [2023-11-12 02:16:06,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:06,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:16:06,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:06,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:16:06,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:16:06,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 514 [2023-11-12 02:16:06,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 386 flow. Second operand has 5 states, 5 states have (on average 216.8) internal successors, (1084), 5 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:06,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:06,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 514 [2023-11-12 02:16:06,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:06,810 INFO L124 PetriNetUnfolderBase]: 125/232 cut-off events. [2023-11-12 02:16:06,811 INFO L125 PetriNetUnfolderBase]: For 628/628 co-relation queries the response was YES. [2023-11-12 02:16:06,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 232 events. 125/232 cut-off events. For 628/628 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 775 event pairs, 34 based on Foata normal form. 4/236 useless extension candidates. Maximal degree in co-relation 1009. Up to 186 conditions per place. [2023-11-12 02:16:06,814 INFO L140 encePairwiseOnDemand]: 509/514 looper letters, 40 selfloop transitions, 16 changer transitions 4/60 dead transitions. [2023-11-12 02:16:06,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 532 flow [2023-11-12 02:16:06,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:16:06,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:16:06,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1101 transitions. [2023-11-12 02:16:06,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42840466926070037 [2023-11-12 02:16:06,820 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1101 transitions. [2023-11-12 02:16:06,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1101 transitions. [2023-11-12 02:16:06,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:06,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1101 transitions. [2023-11-12 02:16:06,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.2) internal successors, (1101), 5 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:06,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:06,831 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:06,831 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 386 flow. Second operand 5 states and 1101 transitions. [2023-11-12 02:16:06,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 532 flow [2023-11-12 02:16:06,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 60 transitions, 507 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-12 02:16:06,838 INFO L231 Difference]: Finished difference. Result has 64 places, 51 transitions, 386 flow [2023-11-12 02:16:06,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=386, PETRI_PLACES=64, PETRI_TRANSITIONS=51} [2023-11-12 02:16:06,839 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 35 predicate places. [2023-11-12 02:16:06,839 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 51 transitions, 386 flow [2023-11-12 02:16:06,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 216.8) internal successors, (1084), 5 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:06,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:06,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:06,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-12 02:16:06,840 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)] === [2023-11-12 02:16:06,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:06,841 INFO L85 PathProgramCache]: Analyzing trace with hash 130838046, now seen corresponding path program 6 times [2023-11-12 02:16:06,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:06,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420009480] [2023-11-12 02:16:06,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:06,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:06,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:06,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420009480] [2023-11-12 02:16:06,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420009480] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:06,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:06,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:16:06,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304374891] [2023-11-12 02:16:06,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:06,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:16:06,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:06,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:16:06,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:16:06,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 514 [2023-11-12 02:16:06,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 51 transitions, 386 flow. Second operand has 5 states, 5 states have (on average 216.8) internal successors, (1084), 5 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:06,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:06,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 514 [2023-11-12 02:16:06,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:07,044 INFO L124 PetriNetUnfolderBase]: 120/215 cut-off events. [2023-11-12 02:16:07,044 INFO L125 PetriNetUnfolderBase]: For 661/661 co-relation queries the response was YES. [2023-11-12 02:16:07,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 215 events. 120/215 cut-off events. For 661/661 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 660 event pairs, 29 based on Foata normal form. 2/217 useless extension candidates. Maximal degree in co-relation 947. Up to 157 conditions per place. [2023-11-12 02:16:07,048 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 36 selfloop transitions, 19 changer transitions 2/57 dead transitions. [2023-11-12 02:16:07,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 57 transitions, 517 flow [2023-11-12 02:16:07,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:16:07,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:16:07,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1099 transitions. [2023-11-12 02:16:07,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42762645914396885 [2023-11-12 02:16:07,053 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1099 transitions. [2023-11-12 02:16:07,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1099 transitions. [2023-11-12 02:16:07,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:07,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1099 transitions. [2023-11-12 02:16:07,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.8) internal successors, (1099), 5 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:07,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:07,063 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:07,063 INFO L175 Difference]: Start difference. First operand has 64 places, 51 transitions, 386 flow. Second operand 5 states and 1099 transitions. [2023-11-12 02:16:07,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 57 transitions, 517 flow [2023-11-12 02:16:07,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 485 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-12 02:16:07,069 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 374 flow [2023-11-12 02:16:07,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=374, PETRI_PLACES=63, PETRI_TRANSITIONS=49} [2023-11-12 02:16:07,070 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2023-11-12 02:16:07,070 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 374 flow [2023-11-12 02:16:07,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 216.8) internal successors, (1084), 5 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:07,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:07,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:07,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-12 02:16:07,071 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)] === [2023-11-12 02:16:07,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:07,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1160563961, now seen corresponding path program 5 times [2023-11-12 02:16:07,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:07,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299057793] [2023-11-12 02:16:07,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:07,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:07,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:07,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299057793] [2023-11-12 02:16:07,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299057793] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:07,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:07,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:16:07,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726794892] [2023-11-12 02:16:07,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:07,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:16:07,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:07,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:16:07,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:16:07,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 514 [2023-11-12 02:16:07,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 374 flow. Second operand has 5 states, 5 states have (on average 216.8) internal successors, (1084), 5 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:07,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:07,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 514 [2023-11-12 02:16:07,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:07,305 INFO L124 PetriNetUnfolderBase]: 115/208 cut-off events. [2023-11-12 02:16:07,306 INFO L125 PetriNetUnfolderBase]: For 618/618 co-relation queries the response was YES. [2023-11-12 02:16:07,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 940 conditions, 208 events. 115/208 cut-off events. For 618/618 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 639 event pairs, 31 based on Foata normal form. 4/212 useless extension candidates. Maximal degree in co-relation 923. Up to 153 conditions per place. [2023-11-12 02:16:07,309 INFO L140 encePairwiseOnDemand]: 509/514 looper letters, 36 selfloop transitions, 17 changer transitions 4/57 dead transitions. [2023-11-12 02:16:07,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 513 flow [2023-11-12 02:16:07,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:16:07,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:16:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1100 transitions. [2023-11-12 02:16:07,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4280155642023346 [2023-11-12 02:16:07,315 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1100 transitions. [2023-11-12 02:16:07,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1100 transitions. [2023-11-12 02:16:07,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:07,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1100 transitions. [2023-11-12 02:16:07,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.0) internal successors, (1100), 5 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:07,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:07,355 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:07,355 INFO L175 Difference]: Start difference. First operand has 63 places, 49 transitions, 374 flow. Second operand 5 states and 1100 transitions. [2023-11-12 02:16:07,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 513 flow [2023-11-12 02:16:07,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 57 transitions, 470 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:16:07,361 INFO L231 Difference]: Finished difference. Result has 60 places, 47 transitions, 345 flow [2023-11-12 02:16:07,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=345, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2023-11-12 02:16:07,362 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 31 predicate places. [2023-11-12 02:16:07,363 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 345 flow [2023-11-12 02:16:07,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 216.8) internal successors, (1084), 5 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:07,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:07,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:07,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-12 02:16:07,364 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)] === [2023-11-12 02:16:07,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:07,365 INFO L85 PathProgramCache]: Analyzing trace with hash 265658757, now seen corresponding path program 6 times [2023-11-12 02:16:07,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:07,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639930012] [2023-11-12 02:16:07,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:07,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:07,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:07,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639930012] [2023-11-12 02:16:07,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639930012] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:07,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911587877] [2023-11-12 02:16:07,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:16:07,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:07,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:07,456 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:07,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:16:07,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-12 02:16:07,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:07,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:16:07,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:07,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:07,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911587877] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:07,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:07,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-12 02:16:07,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613957368] [2023-11-12 02:16:07,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:07,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:16:07,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:07,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:16:07,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:16:07,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 514 [2023-11-12 02:16:07,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 345 flow. Second operand has 10 states, 10 states have (on average 215.3) internal successors, (2153), 10 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:07,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:07,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 514 [2023-11-12 02:16:07,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:07,939 INFO L124 PetriNetUnfolderBase]: 110/193 cut-off events. [2023-11-12 02:16:07,939 INFO L125 PetriNetUnfolderBase]: For 466/466 co-relation queries the response was YES. [2023-11-12 02:16:07,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 193 events. 110/193 cut-off events. For 466/466 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 561 event pairs, 14 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 840. Up to 68 conditions per place. [2023-11-12 02:16:07,942 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 43 selfloop transitions, 28 changer transitions 0/71 dead transitions. [2023-11-12 02:16:07,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 71 transitions, 594 flow [2023-11-12 02:16:07,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:16:07,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-12 02:16:07,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2179 transitions. [2023-11-12 02:16:07,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42392996108949416 [2023-11-12 02:16:07,953 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2179 transitions. [2023-11-12 02:16:07,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2179 transitions. [2023-11-12 02:16:07,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:07,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2179 transitions. [2023-11-12 02:16:07,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 217.9) internal successors, (2179), 10 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:07,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 514.0) internal successors, (5654), 11 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:07,972 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 514.0) internal successors, (5654), 11 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:07,972 INFO L175 Difference]: Start difference. First operand has 60 places, 47 transitions, 345 flow. Second operand 10 states and 2179 transitions. [2023-11-12 02:16:07,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 71 transitions, 594 flow [2023-11-12 02:16:07,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 71 transitions, 560 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:16:07,978 INFO L231 Difference]: Finished difference. Result has 65 places, 52 transitions, 410 flow [2023-11-12 02:16:07,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=410, PETRI_PLACES=65, PETRI_TRANSITIONS=52} [2023-11-12 02:16:07,979 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2023-11-12 02:16:07,980 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 52 transitions, 410 flow [2023-11-12 02:16:07,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 215.3) internal successors, (2153), 10 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:07,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:07,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:08,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:08,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:08,188 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)] === [2023-11-12 02:16:08,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:08,188 INFO L85 PathProgramCache]: Analyzing trace with hash 258453816, now seen corresponding path program 1 times [2023-11-12 02:16:08,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:08,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175005675] [2023-11-12 02:16:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:08,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:08,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:08,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175005675] [2023-11-12 02:16:08,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175005675] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:08,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248478426] [2023-11-12 02:16:08,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:08,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:08,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:08,560 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:08,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:16:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:08,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:16:08,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:08,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:09,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:09,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248478426] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:09,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:09,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-12 02:16:09,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137062727] [2023-11-12 02:16:09,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:09,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:16:09,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:09,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:16:09,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:16:09,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 514 [2023-11-12 02:16:09,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 52 transitions, 410 flow. Second operand has 13 states, 13 states have (on average 209.92307692307693) internal successors, (2729), 13 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:09,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:09,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 514 [2023-11-12 02:16:09,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:09,566 INFO L124 PetriNetUnfolderBase]: 161/291 cut-off events. [2023-11-12 02:16:09,567 INFO L125 PetriNetUnfolderBase]: For 725/725 co-relation queries the response was YES. [2023-11-12 02:16:09,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1311 conditions, 291 events. 161/291 cut-off events. For 725/725 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1015 event pairs, 16 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 1292. Up to 185 conditions per place. [2023-11-12 02:16:09,571 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 67 selfloop transitions, 20 changer transitions 5/92 dead transitions. [2023-11-12 02:16:09,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 800 flow [2023-11-12 02:16:09,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:16:09,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:16:09,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1499 transitions. [2023-11-12 02:16:09,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41662034463590886 [2023-11-12 02:16:09,579 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1499 transitions. [2023-11-12 02:16:09,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1499 transitions. [2023-11-12 02:16:09,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:09,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1499 transitions. [2023-11-12 02:16:09,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 214.14285714285714) internal successors, (1499), 7 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:09,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 514.0) internal successors, (4112), 8 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:09,598 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 514.0) internal successors, (4112), 8 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:09,599 INFO L175 Difference]: Start difference. First operand has 65 places, 52 transitions, 410 flow. Second operand 7 states and 1499 transitions. [2023-11-12 02:16:09,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 800 flow [2023-11-12 02:16:09,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 92 transitions, 700 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-11-12 02:16:09,610 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 501 flow [2023-11-12 02:16:09,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=501, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2023-11-12 02:16:09,611 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 39 predicate places. [2023-11-12 02:16:09,611 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 501 flow [2023-11-12 02:16:09,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 209.92307692307693) internal successors, (2729), 13 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:09,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:09,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:09,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:09,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:09,819 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)] === [2023-11-12 02:16:09,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:09,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1482513014, now seen corresponding path program 2 times [2023-11-12 02:16:09,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:09,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492414871] [2023-11-12 02:16:09,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:09,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:10,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:10,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492414871] [2023-11-12 02:16:10,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492414871] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:10,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797111241] [2023-11-12 02:16:10,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:16:10,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:10,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:10,406 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:10,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:16:10,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:16:10,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:10,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:16:10,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:10,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:10,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797111241] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:10,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:10,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-11-12 02:16:10,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352730520] [2023-11-12 02:16:10,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:10,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:16:10,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:10,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:16:10,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:16:11,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 514 [2023-11-12 02:16:11,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 501 flow. Second operand has 13 states, 13 states have (on average 205.6153846153846) internal successors, (2673), 13 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:11,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:11,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 514 [2023-11-12 02:16:11,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:11,635 INFO L124 PetriNetUnfolderBase]: 166/300 cut-off events. [2023-11-12 02:16:11,636 INFO L125 PetriNetUnfolderBase]: For 879/879 co-relation queries the response was YES. [2023-11-12 02:16:11,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1416 conditions, 300 events. 166/300 cut-off events. For 879/879 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1055 event pairs, 18 based on Foata normal form. 1/301 useless extension candidates. Maximal degree in co-relation 1395. Up to 213 conditions per place. [2023-11-12 02:16:11,641 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 66 selfloop transitions, 19 changer transitions 5/90 dead transitions. [2023-11-12 02:16:11,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 90 transitions, 793 flow [2023-11-12 02:16:11,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:16:11,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:16:11,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1467 transitions. [2023-11-12 02:16:11,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4077265147304058 [2023-11-12 02:16:11,645 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1467 transitions. [2023-11-12 02:16:11,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1467 transitions. [2023-11-12 02:16:11,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:11,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1467 transitions. [2023-11-12 02:16:11,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 209.57142857142858) internal successors, (1467), 7 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:11,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 514.0) internal successors, (4112), 8 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:11,657 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 514.0) internal successors, (4112), 8 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:11,657 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 501 flow. Second operand 7 states and 1467 transitions. [2023-11-12 02:16:11,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 90 transitions, 793 flow [2023-11-12 02:16:11,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 90 transitions, 740 flow, removed 23 selfloop flow, removed 2 redundant places. [2023-11-12 02:16:11,667 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 557 flow [2023-11-12 02:16:11,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=557, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2023-11-12 02:16:11,668 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 45 predicate places. [2023-11-12 02:16:11,668 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 557 flow [2023-11-12 02:16:11,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 205.6153846153846) internal successors, (2673), 13 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:11,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:11,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:11,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:11,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:11,877 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)] === [2023-11-12 02:16:11,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:11,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1896772178, now seen corresponding path program 3 times [2023-11-12 02:16:11,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:11,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170765763] [2023-11-12 02:16:11,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:11,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:12,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:12,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170765763] [2023-11-12 02:16:12,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170765763] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:12,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575125778] [2023-11-12 02:16:12,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:16:12,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:12,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:12,420 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:12,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:16:12,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:16:12,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:12,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:16:12,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:12,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:12,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575125778] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:12,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:12,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2023-11-12 02:16:12,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61687397] [2023-11-12 02:16:12,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:12,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:16:12,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:12,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:16:12,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:16:13,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 514 [2023-11-12 02:16:13,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 557 flow. Second operand has 15 states, 15 states have (on average 203.66666666666666) internal successors, (3055), 15 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:13,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:13,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 514 [2023-11-12 02:16:13,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:13,682 INFO L124 PetriNetUnfolderBase]: 163/291 cut-off events. [2023-11-12 02:16:13,683 INFO L125 PetriNetUnfolderBase]: For 886/886 co-relation queries the response was YES. [2023-11-12 02:16:13,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1416 conditions, 291 events. 163/291 cut-off events. For 886/886 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1010 event pairs, 16 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 1392. Up to 189 conditions per place. [2023-11-12 02:16:13,687 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 65 selfloop transitions, 21 changer transitions 5/91 dead transitions. [2023-11-12 02:16:13,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 91 transitions, 821 flow [2023-11-12 02:16:13,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:16:13,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:16:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1455 transitions. [2023-11-12 02:16:13,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40439132851584214 [2023-11-12 02:16:13,691 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1455 transitions. [2023-11-12 02:16:13,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1455 transitions. [2023-11-12 02:16:13,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:13,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1455 transitions. [2023-11-12 02:16:13,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 207.85714285714286) internal successors, (1455), 7 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:13,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 514.0) internal successors, (4112), 8 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:13,701 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 514.0) internal successors, (4112), 8 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:13,701 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 557 flow. Second operand 7 states and 1455 transitions. [2023-11-12 02:16:13,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 91 transitions, 821 flow [2023-11-12 02:16:13,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 91 transitions, 779 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-12 02:16:13,711 INFO L231 Difference]: Finished difference. Result has 78 places, 70 transitions, 588 flow [2023-11-12 02:16:13,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=78, PETRI_TRANSITIONS=70} [2023-11-12 02:16:13,712 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 49 predicate places. [2023-11-12 02:16:13,712 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 70 transitions, 588 flow [2023-11-12 02:16:13,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 203.66666666666666) internal successors, (3055), 15 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:13,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:13,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:13,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:13,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:13,923 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)] === [2023-11-12 02:16:13,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:13,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1193104714, now seen corresponding path program 4 times [2023-11-12 02:16:13,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:13,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041714213] [2023-11-12 02:16:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:13,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:14,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:14,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041714213] [2023-11-12 02:16:14,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041714213] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:14,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112877511] [2023-11-12 02:16:14,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:16:14,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:14,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:14,188 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:14,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:16:14,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:16:14,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:14,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:16:14,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:14,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:14,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112877511] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:14,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:14,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-12 02:16:14,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063533004] [2023-11-12 02:16:14,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:14,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:16:14,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:14,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:16:14,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:16:14,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 514 [2023-11-12 02:16:14,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 70 transitions, 588 flow. Second operand has 12 states, 12 states have (on average 210.16666666666666) internal successors, (2522), 12 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:14,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:14,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 514 [2023-11-12 02:16:14,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:15,214 INFO L124 PetriNetUnfolderBase]: 186/332 cut-off events. [2023-11-12 02:16:15,215 INFO L125 PetriNetUnfolderBase]: For 1161/1161 co-relation queries the response was YES. [2023-11-12 02:16:15,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1608 conditions, 332 events. 186/332 cut-off events. For 1161/1161 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1220 event pairs, 16 based on Foata normal form. 1/333 useless extension candidates. Maximal degree in co-relation 1582. Up to 273 conditions per place. [2023-11-12 02:16:15,220 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 71 selfloop transitions, 20 changer transitions 5/96 dead transitions. [2023-11-12 02:16:15,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 96 transitions, 923 flow [2023-11-12 02:16:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:16:15,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:16:15,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1487 transitions. [2023-11-12 02:16:15,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41328515842134517 [2023-11-12 02:16:15,223 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1487 transitions. [2023-11-12 02:16:15,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1487 transitions. [2023-11-12 02:16:15,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:15,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1487 transitions. [2023-11-12 02:16:15,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 212.42857142857142) internal successors, (1487), 7 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:15,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 514.0) internal successors, (4112), 8 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:15,232 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 514.0) internal successors, (4112), 8 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:15,232 INFO L175 Difference]: Start difference. First operand has 78 places, 70 transitions, 588 flow. Second operand 7 states and 1487 transitions. [2023-11-12 02:16:15,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 96 transitions, 923 flow [2023-11-12 02:16:15,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 96 transitions, 876 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-11-12 02:16:15,242 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 722 flow [2023-11-12 02:16:15,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=722, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2023-11-12 02:16:15,243 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 54 predicate places. [2023-11-12 02:16:15,243 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 722 flow [2023-11-12 02:16:15,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 210.16666666666666) internal successors, (2522), 12 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:15,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:15,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:15,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:15,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:15,450 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)] === [2023-11-12 02:16:15,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:15,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1173129482, now seen corresponding path program 5 times [2023-11-12 02:16:15,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:15,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512960791] [2023-11-12 02:16:15,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:15,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:15,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:15,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512960791] [2023-11-12 02:16:15,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512960791] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:15,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314825527] [2023-11-12 02:16:15,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:16:15,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:15,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:15,659 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:15,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:16:15,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-12 02:16:15,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:15,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:16:15,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:15,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:16,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:16,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314825527] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:16,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:16,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-12 02:16:16,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388104800] [2023-11-12 02:16:16,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:16,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:16:16,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:16,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:16:16,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:16:16,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 514 [2023-11-12 02:16:16,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 722 flow. Second operand has 13 states, 13 states have (on average 210.07692307692307) internal successors, (2731), 13 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:16,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:16,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 514 [2023-11-12 02:16:16,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:16,626 INFO L124 PetriNetUnfolderBase]: 200/360 cut-off events. [2023-11-12 02:16:16,627 INFO L125 PetriNetUnfolderBase]: For 1455/1455 co-relation queries the response was YES. [2023-11-12 02:16:16,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1840 conditions, 360 events. 200/360 cut-off events. For 1455/1455 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1354 event pairs, 16 based on Foata normal form. 1/361 useless extension candidates. Maximal degree in co-relation 1811. Up to 277 conditions per place. [2023-11-12 02:16:16,632 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 79 selfloop transitions, 21 changer transitions 5/105 dead transitions. [2023-11-12 02:16:16,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 105 transitions, 1060 flow [2023-11-12 02:16:16,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:16:16,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:16:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1493 transitions. [2023-11-12 02:16:16,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41495275152862704 [2023-11-12 02:16:16,639 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1493 transitions. [2023-11-12 02:16:16,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1493 transitions. [2023-11-12 02:16:16,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:16,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1493 transitions. [2023-11-12 02:16:16,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 213.28571428571428) internal successors, (1493), 7 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:16,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 514.0) internal successors, (4112), 8 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:16,649 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 514.0) internal successors, (4112), 8 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:16,650 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 722 flow. Second operand 7 states and 1493 transitions. [2023-11-12 02:16:16,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 105 transitions, 1060 flow [2023-11-12 02:16:16,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 105 transitions, 1015 flow, removed 19 selfloop flow, removed 2 redundant places. [2023-11-12 02:16:16,662 INFO L231 Difference]: Finished difference. Result has 89 places, 87 transitions, 793 flow [2023-11-12 02:16:16,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=793, PETRI_PLACES=89, PETRI_TRANSITIONS=87} [2023-11-12 02:16:16,663 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 60 predicate places. [2023-11-12 02:16:16,664 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 87 transitions, 793 flow [2023-11-12 02:16:16,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 210.07692307692307) internal successors, (2731), 13 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:16,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:16,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:16,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:16,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:16,871 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)] === [2023-11-12 02:16:16,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:16,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1200835112, now seen corresponding path program 6 times [2023-11-12 02:16:16,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:16,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524940067] [2023-11-12 02:16:16,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:16,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:17,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:17,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524940067] [2023-11-12 02:16:17,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524940067] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:17,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062674265] [2023-11-12 02:16:17,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:16:17,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:17,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:17,126 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:17,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:16:17,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-12 02:16:17,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:17,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:16:17,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:17,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:17,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062674265] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:17,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:17,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-12 02:16:17,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698617191] [2023-11-12 02:16:17,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:17,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:16:17,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:17,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:16:17,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:16:18,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 514 [2023-11-12 02:16:18,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 87 transitions, 793 flow. Second operand has 14 states, 14 states have (on average 209.85714285714286) internal successors, (2938), 14 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:18,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:18,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 514 [2023-11-12 02:16:18,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:18,337 INFO L124 PetriNetUnfolderBase]: 197/351 cut-off events. [2023-11-12 02:16:18,337 INFO L125 PetriNetUnfolderBase]: For 1678/1678 co-relation queries the response was YES. [2023-11-12 02:16:18,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1864 conditions, 351 events. 197/351 cut-off events. For 1678/1678 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1306 event pairs, 16 based on Foata normal form. 1/352 useless extension candidates. Maximal degree in co-relation 1832. Up to 277 conditions per place. [2023-11-12 02:16:18,343 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 77 selfloop transitions, 22 changer transitions 5/104 dead transitions. [2023-11-12 02:16:18,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 104 transitions, 1095 flow [2023-11-12 02:16:18,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:16:18,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:16:18,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1491 transitions. [2023-11-12 02:16:18,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4143968871595331 [2023-11-12 02:16:18,347 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1491 transitions. [2023-11-12 02:16:18,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1491 transitions. [2023-11-12 02:16:18,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:18,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1491 transitions. [2023-11-12 02:16:18,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 213.0) internal successors, (1491), 7 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:18,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 514.0) internal successors, (4112), 8 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:18,355 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 514.0) internal successors, (4112), 8 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:18,355 INFO L175 Difference]: Start difference. First operand has 89 places, 87 transitions, 793 flow. Second operand 7 states and 1491 transitions. [2023-11-12 02:16:18,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 104 transitions, 1095 flow [2023-11-12 02:16:18,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 104 transitions, 1016 flow, removed 24 selfloop flow, removed 4 redundant places. [2023-11-12 02:16:18,371 INFO L231 Difference]: Finished difference. Result has 93 places, 89 transitions, 814 flow [2023-11-12 02:16:18,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=814, PETRI_PLACES=93, PETRI_TRANSITIONS=89} [2023-11-12 02:16:18,372 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 64 predicate places. [2023-11-12 02:16:18,372 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 89 transitions, 814 flow [2023-11-12 02:16:18,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 209.85714285714286) internal successors, (2938), 14 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:18,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:18,374 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:18,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:18,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-12 02:16:18,580 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)] === [2023-11-12 02:16:18,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:18,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1540915950, now seen corresponding path program 7 times [2023-11-12 02:16:18,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:18,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770348840] [2023-11-12 02:16:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:18,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:18,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:18,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770348840] [2023-11-12 02:16:18,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770348840] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:18,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132700030] [2023-11-12 02:16:18,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:16:18,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:18,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:18,671 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:18,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:16:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:18,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:16:18,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:18,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:18,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132700030] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:18,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:18,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-12 02:16:18,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177222901] [2023-11-12 02:16:18,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:18,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:16:18,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:18,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:16:18,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:16:18,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 514 [2023-11-12 02:16:18,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 89 transitions, 814 flow. Second operand has 11 states, 11 states have (on average 215.54545454545453) internal successors, (2371), 11 states have internal predecessors, (2371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:18,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:18,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 514 [2023-11-12 02:16:18,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:19,217 INFO L124 PetriNetUnfolderBase]: 214/385 cut-off events. [2023-11-12 02:16:19,217 INFO L125 PetriNetUnfolderBase]: For 1943/1943 co-relation queries the response was YES. [2023-11-12 02:16:19,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2043 conditions, 385 events. 214/385 cut-off events. For 1943/1943 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1520 event pairs, 35 based on Foata normal form. 4/389 useless extension candidates. Maximal degree in co-relation 2009. Up to 155 conditions per place. [2023-11-12 02:16:19,223 INFO L140 encePairwiseOnDemand]: 509/514 looper letters, 75 selfloop transitions, 34 changer transitions 10/119 dead transitions. [2023-11-12 02:16:19,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 119 transitions, 1246 flow [2023-11-12 02:16:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:16:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:16:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1539 transitions. [2023-11-12 02:16:19,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42773763201778764 [2023-11-12 02:16:19,227 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1539 transitions. [2023-11-12 02:16:19,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1539 transitions. [2023-11-12 02:16:19,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:19,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1539 transitions. [2023-11-12 02:16:19,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 219.85714285714286) internal successors, (1539), 7 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:19,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 514.0) internal successors, (4112), 8 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:19,235 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 514.0) internal successors, (4112), 8 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:19,235 INFO L175 Difference]: Start difference. First operand has 93 places, 89 transitions, 814 flow. Second operand 7 states and 1539 transitions. [2023-11-12 02:16:19,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 119 transitions, 1246 flow [2023-11-12 02:16:19,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 119 transitions, 1189 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-11-12 02:16:19,254 INFO L231 Difference]: Finished difference. Result has 98 places, 91 transitions, 899 flow [2023-11-12 02:16:19,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=899, PETRI_PLACES=98, PETRI_TRANSITIONS=91} [2023-11-12 02:16:19,255 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 69 predicate places. [2023-11-12 02:16:19,255 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 91 transitions, 899 flow [2023-11-12 02:16:19,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 215.54545454545453) internal successors, (2371), 11 states have internal predecessors, (2371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:19,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:19,257 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:19,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:19,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-12 02:16:19,463 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)] === [2023-11-12 02:16:19,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:19,463 INFO L85 PathProgramCache]: Analyzing trace with hash 963856725, now seen corresponding path program 8 times [2023-11-12 02:16:19,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:19,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111197668] [2023-11-12 02:16:19,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:19,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:19,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:19,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111197668] [2023-11-12 02:16:19,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111197668] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:19,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341341203] [2023-11-12 02:16:19,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:16:19,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:19,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:19,579 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:19,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:16:19,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:16:19,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:19,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:16:19,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:19,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:19,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341341203] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:19,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:19,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-12 02:16:19,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653681762] [2023-11-12 02:16:19,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:19,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:16:19,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:19,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:16:19,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:16:19,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 514 [2023-11-12 02:16:19,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 91 transitions, 899 flow. Second operand has 11 states, 11 states have (on average 215.1818181818182) internal successors, (2367), 11 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:19,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:19,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 514 [2023-11-12 02:16:19,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:20,133 INFO L124 PetriNetUnfolderBase]: 224/399 cut-off events. [2023-11-12 02:16:20,133 INFO L125 PetriNetUnfolderBase]: For 2534/2534 co-relation queries the response was YES. [2023-11-12 02:16:20,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2233 conditions, 399 events. 224/399 cut-off events. For 2534/2534 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1571 event pairs, 22 based on Foata normal form. 6/405 useless extension candidates. Maximal degree in co-relation 2196. Up to 104 conditions per place. [2023-11-12 02:16:20,140 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 83 selfloop transitions, 48 changer transitions 0/131 dead transitions. [2023-11-12 02:16:20,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 131 transitions, 1420 flow [2023-11-12 02:16:20,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:16:20,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-12 02:16:20,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2194 transitions. [2023-11-12 02:16:20,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42684824902723734 [2023-11-12 02:16:20,145 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2194 transitions. [2023-11-12 02:16:20,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2194 transitions. [2023-11-12 02:16:20,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:20,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2194 transitions. [2023-11-12 02:16:20,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 219.4) internal successors, (2194), 10 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:20,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 514.0) internal successors, (5654), 11 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:20,158 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 514.0) internal successors, (5654), 11 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:20,158 INFO L175 Difference]: Start difference. First operand has 98 places, 91 transitions, 899 flow. Second operand 10 states and 2194 transitions. [2023-11-12 02:16:20,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 131 transitions, 1420 flow [2023-11-12 02:16:20,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 131 transitions, 1374 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-12 02:16:20,179 INFO L231 Difference]: Finished difference. Result has 106 places, 98 transitions, 1063 flow [2023-11-12 02:16:20,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1063, PETRI_PLACES=106, PETRI_TRANSITIONS=98} [2023-11-12 02:16:20,180 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 77 predicate places. [2023-11-12 02:16:20,180 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 98 transitions, 1063 flow [2023-11-12 02:16:20,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 215.1818181818182) internal successors, (2367), 11 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:20,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:20,181 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:20,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:20,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-12 02:16:20,388 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:16:20,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:20,388 INFO L85 PathProgramCache]: Analyzing trace with hash 731009731, now seen corresponding path program 9 times [2023-11-12 02:16:20,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:20,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275457773] [2023-11-12 02:16:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:20,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:20,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:20,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275457773] [2023-11-12 02:16:20,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275457773] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:20,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647402068] [2023-11-12 02:16:20,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:16:20,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:20,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:20,482 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:20,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:16:20,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:16:20,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:20,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:16:20,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:20,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:20,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647402068] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:20,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:20,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-12 02:16:20,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448750935] [2023-11-12 02:16:20,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:20,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:16:20,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:20,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:16:20,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:16:20,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 514 [2023-11-12 02:16:20,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 98 transitions, 1063 flow. Second operand has 13 states, 13 states have (on average 214.92307692307693) internal successors, (2794), 13 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:20,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:20,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 514 [2023-11-12 02:16:20,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:21,199 INFO L124 PetriNetUnfolderBase]: 274/483 cut-off events. [2023-11-12 02:16:21,199 INFO L125 PetriNetUnfolderBase]: For 4901/4901 co-relation queries the response was YES. [2023-11-12 02:16:21,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3024 conditions, 483 events. 274/483 cut-off events. For 4901/4901 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1934 event pairs, 37 based on Foata normal form. 20/503 useless extension candidates. Maximal degree in co-relation 2984. Up to 185 conditions per place. [2023-11-12 02:16:21,209 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 86 selfloop transitions, 63 changer transitions 0/149 dead transitions. [2023-11-12 02:16:21,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 149 transitions, 1855 flow [2023-11-12 02:16:21,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:16:21,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:16:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3057 transitions. [2023-11-12 02:16:21,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42481934408004446 [2023-11-12 02:16:21,217 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3057 transitions. [2023-11-12 02:16:21,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3057 transitions. [2023-11-12 02:16:21,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:21,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3057 transitions. [2023-11-12 02:16:21,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 218.35714285714286) internal successors, (3057), 14 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:21,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 514.0) internal successors, (7710), 15 states have internal predecessors, (7710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:21,236 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 514.0) internal successors, (7710), 15 states have internal predecessors, (7710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:21,237 INFO L175 Difference]: Start difference. First operand has 106 places, 98 transitions, 1063 flow. Second operand 14 states and 3057 transitions. [2023-11-12 02:16:21,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 149 transitions, 1855 flow [2023-11-12 02:16:21,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 149 transitions, 1665 flow, removed 62 selfloop flow, removed 4 redundant places. [2023-11-12 02:16:21,263 INFO L231 Difference]: Finished difference. Result has 122 places, 119 transitions, 1409 flow [2023-11-12 02:16:21,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1409, PETRI_PLACES=122, PETRI_TRANSITIONS=119} [2023-11-12 02:16:21,264 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 93 predicate places. [2023-11-12 02:16:21,264 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 119 transitions, 1409 flow [2023-11-12 02:16:21,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 214.92307692307693) internal successors, (2794), 13 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:21,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:21,266 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:21,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:21,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-12 02:16:21,472 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:16:21,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:21,472 INFO L85 PathProgramCache]: Analyzing trace with hash -324784431, now seen corresponding path program 10 times [2023-11-12 02:16:21,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:21,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751219943] [2023-11-12 02:16:21,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:21,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:21,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:21,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751219943] [2023-11-12 02:16:21,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751219943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:21,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029416764] [2023-11-12 02:16:21,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:16:21,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:21,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:21,573 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:21,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:16:21,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:16:21,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:21,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:16:21,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:21,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:21,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029416764] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:21,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:21,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-12 02:16:21,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841233362] [2023-11-12 02:16:21,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:21,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:16:21,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:21,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:16:21,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:16:21,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 514 [2023-11-12 02:16:21,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 119 transitions, 1409 flow. Second operand has 12 states, 12 states have (on average 215.16666666666666) internal successors, (2582), 12 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:21,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:21,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 514 [2023-11-12 02:16:21,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:22,295 INFO L124 PetriNetUnfolderBase]: 331/578 cut-off events. [2023-11-12 02:16:22,296 INFO L125 PetriNetUnfolderBase]: For 8703/8703 co-relation queries the response was YES. [2023-11-12 02:16:22,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3872 conditions, 578 events. 331/578 cut-off events. For 8703/8703 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2396 event pairs, 34 based on Foata normal form. 14/592 useless extension candidates. Maximal degree in co-relation 3826. Up to 230 conditions per place. [2023-11-12 02:16:22,307 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 82 selfloop transitions, 93 changer transitions 0/175 dead transitions. [2023-11-12 02:16:22,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 175 transitions, 2381 flow [2023-11-12 02:16:22,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:16:22,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-12 02:16:22,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3490 transitions. [2023-11-12 02:16:22,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42436770428015563 [2023-11-12 02:16:22,313 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3490 transitions. [2023-11-12 02:16:22,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3490 transitions. [2023-11-12 02:16:22,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:22,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3490 transitions. [2023-11-12 02:16:22,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 218.125) internal successors, (3490), 16 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:22,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 514.0) internal successors, (8738), 17 states have internal predecessors, (8738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:22,329 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 514.0) internal successors, (8738), 17 states have internal predecessors, (8738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:22,329 INFO L175 Difference]: Start difference. First operand has 122 places, 119 transitions, 1409 flow. Second operand 16 states and 3490 transitions. [2023-11-12 02:16:22,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 175 transitions, 2381 flow [2023-11-12 02:16:22,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 175 transitions, 2155 flow, removed 94 selfloop flow, removed 4 redundant places. [2023-11-12 02:16:22,369 INFO L231 Difference]: Finished difference. Result has 141 places, 146 transitions, 1916 flow [2023-11-12 02:16:22,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1916, PETRI_PLACES=141, PETRI_TRANSITIONS=146} [2023-11-12 02:16:22,372 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 112 predicate places. [2023-11-12 02:16:22,372 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 146 transitions, 1916 flow [2023-11-12 02:16:22,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 215.16666666666666) internal successors, (2582), 12 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:22,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:22,373 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:22,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:22,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-12 02:16:22,584 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:16:22,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:22,586 INFO L85 PathProgramCache]: Analyzing trace with hash 247325467, now seen corresponding path program 11 times [2023-11-12 02:16:22,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:22,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040526555] [2023-11-12 02:16:22,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:22,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:22,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:22,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040526555] [2023-11-12 02:16:22,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040526555] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:22,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467890119] [2023-11-12 02:16:22,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:16:22,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:22,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:22,695 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:22,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-12 02:16:22,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-12 02:16:22,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:22,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:16:22,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:22,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:22,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467890119] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:22,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:22,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-12 02:16:22,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214769161] [2023-11-12 02:16:22,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:22,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:16:22,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:22,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:16:22,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:16:22,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 514 [2023-11-12 02:16:22,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 146 transitions, 1916 flow. Second operand has 12 states, 12 states have (on average 215.0) internal successors, (2580), 12 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:22,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:22,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 514 [2023-11-12 02:16:22,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:23,377 INFO L124 PetriNetUnfolderBase]: 331/582 cut-off events. [2023-11-12 02:16:23,378 INFO L125 PetriNetUnfolderBase]: For 9294/9294 co-relation queries the response was YES. [2023-11-12 02:16:23,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4173 conditions, 582 events. 331/582 cut-off events. For 9294/9294 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2468 event pairs, 52 based on Foata normal form. 4/586 useless extension candidates. Maximal degree in co-relation 4118. Up to 298 conditions per place. [2023-11-12 02:16:23,390 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 89 selfloop transitions, 78 changer transitions 2/169 dead transitions. [2023-11-12 02:16:23,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 169 transitions, 2505 flow [2023-11-12 02:16:23,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:16:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-12 02:16:23,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2831 transitions. [2023-11-12 02:16:23,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236755462436396 [2023-11-12 02:16:23,395 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2831 transitions. [2023-11-12 02:16:23,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2831 transitions. [2023-11-12 02:16:23,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:23,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2831 transitions. [2023-11-12 02:16:23,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 217.76923076923077) internal successors, (2831), 13 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:23,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 514.0) internal successors, (7196), 14 states have internal predecessors, (7196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:23,409 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 514.0) internal successors, (7196), 14 states have internal predecessors, (7196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:23,409 INFO L175 Difference]: Start difference. First operand has 141 places, 146 transitions, 1916 flow. Second operand 13 states and 2831 transitions. [2023-11-12 02:16:23,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 169 transitions, 2505 flow [2023-11-12 02:16:23,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 169 transitions, 2272 flow, removed 95 selfloop flow, removed 5 redundant places. [2023-11-12 02:16:23,472 INFO L231 Difference]: Finished difference. Result has 150 places, 146 transitions, 1853 flow [2023-11-12 02:16:23,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1853, PETRI_PLACES=150, PETRI_TRANSITIONS=146} [2023-11-12 02:16:23,473 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 121 predicate places. [2023-11-12 02:16:23,473 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 146 transitions, 1853 flow [2023-11-12 02:16:23,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 215.0) internal successors, (2580), 12 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:23,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:23,474 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:23,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-12 02:16:23,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:23,680 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:16:23,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:23,680 INFO L85 PathProgramCache]: Analyzing trace with hash -200667348, now seen corresponding path program 12 times [2023-11-12 02:16:23,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:23,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665500322] [2023-11-12 02:16:23,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:23,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:23,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:23,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665500322] [2023-11-12 02:16:23,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665500322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:23,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249498220] [2023-11-12 02:16:23,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:16:23,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:23,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:23,768 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:23,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-12 02:16:23,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-12 02:16:23,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:23,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:16:23,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:23,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:23,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249498220] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:23,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:23,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-12 02:16:23,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913752083] [2023-11-12 02:16:23,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:23,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:16:23,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:23,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:16:23,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:16:24,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 514 [2023-11-12 02:16:24,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 146 transitions, 1853 flow. Second operand has 12 states, 12 states have (on average 215.0) internal successors, (2580), 12 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:24,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:24,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 514 [2023-11-12 02:16:24,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:24,496 INFO L124 PetriNetUnfolderBase]: 380/649 cut-off events. [2023-11-12 02:16:24,496 INFO L125 PetriNetUnfolderBase]: For 12584/12584 co-relation queries the response was YES. [2023-11-12 02:16:24,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4820 conditions, 649 events. 380/649 cut-off events. For 12584/12584 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2704 event pairs, 77 based on Foata normal form. 8/657 useless extension candidates. Maximal degree in co-relation 4762. Up to 467 conditions per place. [2023-11-12 02:16:24,516 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 127 selfloop transitions, 73 changer transitions 0/200 dead transitions. [2023-11-12 02:16:24,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 200 transitions, 3012 flow [2023-11-12 02:16:24,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:16:24,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-12 02:16:24,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3701 transitions. [2023-11-12 02:16:24,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4235523002975509 [2023-11-12 02:16:24,526 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3701 transitions. [2023-11-12 02:16:24,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3701 transitions. [2023-11-12 02:16:24,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:24,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3701 transitions. [2023-11-12 02:16:24,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 217.7058823529412) internal successors, (3701), 17 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:24,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 514.0) internal successors, (9252), 18 states have internal predecessors, (9252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:24,550 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 514.0) internal successors, (9252), 18 states have internal predecessors, (9252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:24,551 INFO L175 Difference]: Start difference. First operand has 150 places, 146 transitions, 1853 flow. Second operand 17 states and 3701 transitions. [2023-11-12 02:16:24,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 200 transitions, 3012 flow [2023-11-12 02:16:24,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 200 transitions, 2800 flow, removed 30 selfloop flow, removed 12 redundant places. [2023-11-12 02:16:24,615 INFO L231 Difference]: Finished difference. Result has 157 places, 177 transitions, 2529 flow [2023-11-12 02:16:24,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2529, PETRI_PLACES=157, PETRI_TRANSITIONS=177} [2023-11-12 02:16:24,616 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 128 predicate places. [2023-11-12 02:16:24,616 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 177 transitions, 2529 flow [2023-11-12 02:16:24,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 215.0) internal successors, (2580), 12 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:24,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:24,617 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:24,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:24,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:24,823 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:16:24,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:24,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1041035116, now seen corresponding path program 13 times [2023-11-12 02:16:24,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:24,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922325110] [2023-11-12 02:16:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:24,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:24,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:24,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922325110] [2023-11-12 02:16:24,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922325110] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:24,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191172460] [2023-11-12 02:16:24,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:16:24,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:24,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:24,918 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:24,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-12 02:16:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:25,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:16:25,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:25,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:25,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191172460] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:25,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:25,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-12 02:16:25,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987094030] [2023-11-12 02:16:25,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:25,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:16:25,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:25,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:16:25,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:16:25,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 514 [2023-11-12 02:16:25,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 177 transitions, 2529 flow. Second operand has 12 states, 12 states have (on average 215.25) internal successors, (2583), 12 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:25,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:25,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 514 [2023-11-12 02:16:25,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:25,593 INFO L124 PetriNetUnfolderBase]: 381/662 cut-off events. [2023-11-12 02:16:25,594 INFO L125 PetriNetUnfolderBase]: For 12044/12044 co-relation queries the response was YES. [2023-11-12 02:16:25,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4963 conditions, 662 events. 381/662 cut-off events. For 12044/12044 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2858 event pairs, 78 based on Foata normal form. 12/674 useless extension candidates. Maximal degree in co-relation 4904. Up to 466 conditions per place. [2023-11-12 02:16:25,610 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 129 selfloop transitions, 66 changer transitions 5/200 dead transitions. [2023-11-12 02:16:25,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 200 transitions, 3077 flow [2023-11-12 02:16:25,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:16:25,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:16:25,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2621 transitions. [2023-11-12 02:16:25,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42493514915693903 [2023-11-12 02:16:25,619 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2621 transitions. [2023-11-12 02:16:25,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2621 transitions. [2023-11-12 02:16:25,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:25,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2621 transitions. [2023-11-12 02:16:25,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 218.41666666666666) internal successors, (2621), 12 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:25,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 514.0) internal successors, (6682), 13 states have internal predecessors, (6682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:25,634 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 514.0) internal successors, (6682), 13 states have internal predecessors, (6682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:25,634 INFO L175 Difference]: Start difference. First operand has 157 places, 177 transitions, 2529 flow. Second operand 12 states and 2621 transitions. [2023-11-12 02:16:25,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 200 transitions, 3077 flow [2023-11-12 02:16:25,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 200 transitions, 2549 flow, removed 195 selfloop flow, removed 8 redundant places. [2023-11-12 02:16:25,749 INFO L231 Difference]: Finished difference. Result has 162 places, 176 transitions, 2148 flow [2023-11-12 02:16:25,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=2001, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2148, PETRI_PLACES=162, PETRI_TRANSITIONS=176} [2023-11-12 02:16:25,751 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 133 predicate places. [2023-11-12 02:16:25,751 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 176 transitions, 2148 flow [2023-11-12 02:16:25,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 215.25) internal successors, (2583), 12 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:25,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:25,752 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:25,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:25,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-12 02:16:25,958 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:16:25,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:25,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1295816726, now seen corresponding path program 14 times [2023-11-12 02:16:25,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:25,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001160218] [2023-11-12 02:16:25,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:25,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:26,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:26,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001160218] [2023-11-12 02:16:26,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001160218] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:26,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144958973] [2023-11-12 02:16:26,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:16:26,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:26,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:26,072 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:26,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-12 02:16:26,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:16:26,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:26,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:16:26,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:26,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:26,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:26,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144958973] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:26,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:26,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-12 02:16:26,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875150469] [2023-11-12 02:16:26,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:26,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:16:26,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:26,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:16:26,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:16:26,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 514 [2023-11-12 02:16:26,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 176 transitions, 2148 flow. Second operand has 13 states, 13 states have (on average 215.30769230769232) internal successors, (2799), 13 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:26,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:26,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 514 [2023-11-12 02:16:26,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:26,795 INFO L124 PetriNetUnfolderBase]: 378/655 cut-off events. [2023-11-12 02:16:26,795 INFO L125 PetriNetUnfolderBase]: For 8822/8822 co-relation queries the response was YES. [2023-11-12 02:16:26,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4458 conditions, 655 events. 378/655 cut-off events. For 8822/8822 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2786 event pairs, 85 based on Foata normal form. 4/659 useless extension candidates. Maximal degree in co-relation 4400. Up to 485 conditions per place. [2023-11-12 02:16:26,809 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 138 selfloop transitions, 47 changer transitions 10/195 dead transitions. [2023-11-12 02:16:26,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 195 transitions, 2620 flow [2023-11-12 02:16:26,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:16:26,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-12 02:16:26,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2183 transitions. [2023-11-12 02:16:26,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42470817120622567 [2023-11-12 02:16:26,814 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2183 transitions. [2023-11-12 02:16:26,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2183 transitions. [2023-11-12 02:16:26,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:26,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2183 transitions. [2023-11-12 02:16:26,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 218.3) internal successors, (2183), 10 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:26,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 514.0) internal successors, (5654), 11 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:26,826 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 514.0) internal successors, (5654), 11 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:26,827 INFO L175 Difference]: Start difference. First operand has 162 places, 176 transitions, 2148 flow. Second operand 10 states and 2183 transitions. [2023-11-12 02:16:26,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 195 transitions, 2620 flow [2023-11-12 02:16:26,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 195 transitions, 2447 flow, removed 22 selfloop flow, removed 10 redundant places. [2023-11-12 02:16:26,896 INFO L231 Difference]: Finished difference. Result has 161 places, 172 transitions, 2007 flow [2023-11-12 02:16:26,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2007, PETRI_PLACES=161, PETRI_TRANSITIONS=172} [2023-11-12 02:16:26,898 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 132 predicate places. [2023-11-12 02:16:26,898 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 172 transitions, 2007 flow [2023-11-12 02:16:26,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 215.30769230769232) internal successors, (2799), 13 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:26,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:26,899 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:26,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:27,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-12 02:16:27,105 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:16:27,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:27,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1798151833, now seen corresponding path program 15 times [2023-11-12 02:16:27,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:27,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485106099] [2023-11-12 02:16:27,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:27,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:27,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:27,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485106099] [2023-11-12 02:16:27,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485106099] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:27,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851105807] [2023-11-12 02:16:27,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:16:27,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:27,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:27,209 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:27,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-12 02:16:27,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:16:27,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:27,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:16:27,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:27,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:27,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:27,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851105807] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:27,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:27,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-12 02:16:27,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766617050] [2023-11-12 02:16:27,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:27,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:16:27,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:27,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:16:27,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:16:27,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 514 [2023-11-12 02:16:27,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 172 transitions, 2007 flow. Second operand has 15 states, 15 states have (on average 214.73333333333332) internal successors, (3221), 15 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:27,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:27,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 514 [2023-11-12 02:16:27,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:27,959 INFO L124 PetriNetUnfolderBase]: 420/711 cut-off events. [2023-11-12 02:16:27,960 INFO L125 PetriNetUnfolderBase]: For 10319/10319 co-relation queries the response was YES. [2023-11-12 02:16:27,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4862 conditions, 711 events. 420/711 cut-off events. For 10319/10319 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3029 event pairs, 55 based on Foata normal form. 8/719 useless extension candidates. Maximal degree in co-relation 4804. Up to 313 conditions per place. [2023-11-12 02:16:27,973 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 104 selfloop transitions, 114 changer transitions 5/223 dead transitions. [2023-11-12 02:16:27,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 223 transitions, 3114 flow [2023-11-12 02:16:27,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:16:27,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-12 02:16:27,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3479 transitions. [2023-11-12 02:16:27,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42303015564202334 [2023-11-12 02:16:27,979 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3479 transitions. [2023-11-12 02:16:27,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3479 transitions. [2023-11-12 02:16:27,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:27,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3479 transitions. [2023-11-12 02:16:27,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 217.4375) internal successors, (3479), 16 states have internal predecessors, (3479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:27,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 514.0) internal successors, (8738), 17 states have internal predecessors, (8738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:27,996 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 514.0) internal successors, (8738), 17 states have internal predecessors, (8738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:27,996 INFO L175 Difference]: Start difference. First operand has 161 places, 172 transitions, 2007 flow. Second operand 16 states and 3479 transitions. [2023-11-12 02:16:27,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 223 transitions, 3114 flow [2023-11-12 02:16:28,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 223 transitions, 3001 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-11-12 02:16:28,058 INFO L231 Difference]: Finished difference. Result has 170 places, 197 transitions, 2715 flow [2023-11-12 02:16:28,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2715, PETRI_PLACES=170, PETRI_TRANSITIONS=197} [2023-11-12 02:16:28,059 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 141 predicate places. [2023-11-12 02:16:28,060 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 197 transitions, 2715 flow [2023-11-12 02:16:28,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 214.73333333333332) internal successors, (3221), 15 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:28,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:28,061 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:28,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:28,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-12 02:16:28,267 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:16:28,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:28,268 INFO L85 PathProgramCache]: Analyzing trace with hash -422538687, now seen corresponding path program 16 times [2023-11-12 02:16:28,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:28,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906952474] [2023-11-12 02:16:28,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:28,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:28,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:28,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906952474] [2023-11-12 02:16:28,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906952474] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:28,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68004977] [2023-11-12 02:16:28,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:16:28,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:28,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:28,368 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:28,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-12 02:16:28,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:16:28,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:28,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:16:28,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:28,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:28,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68004977] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:28,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:28,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-12 02:16:28,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252167552] [2023-11-12 02:16:28,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:28,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:16:28,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:28,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:16:28,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:16:28,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 514 [2023-11-12 02:16:28,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 197 transitions, 2715 flow. Second operand has 15 states, 15 states have (on average 215.26666666666668) internal successors, (3229), 15 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:28,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:28,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 514 [2023-11-12 02:16:28,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:29,269 INFO L124 PetriNetUnfolderBase]: 576/977 cut-off events. [2023-11-12 02:16:29,269 INFO L125 PetriNetUnfolderBase]: For 17715/17715 co-relation queries the response was YES. [2023-11-12 02:16:29,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7068 conditions, 977 events. 576/977 cut-off events. For 17715/17715 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4471 event pairs, 42 based on Foata normal form. 10/987 useless extension candidates. Maximal degree in co-relation 7006. Up to 308 conditions per place. [2023-11-12 02:16:29,283 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 148 selfloop transitions, 160 changer transitions 0/308 dead transitions. [2023-11-12 02:16:29,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 308 transitions, 4579 flow [2023-11-12 02:16:29,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-12 02:16:29,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-12 02:16:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 5005 transitions. [2023-11-12 02:16:29,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4233632211131788 [2023-11-12 02:16:29,292 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 5005 transitions. [2023-11-12 02:16:29,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 5005 transitions. [2023-11-12 02:16:29,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:29,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 5005 transitions. [2023-11-12 02:16:29,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 217.6086956521739) internal successors, (5005), 23 states have internal predecessors, (5005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:29,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 514.0) internal successors, (12336), 24 states have internal predecessors, (12336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:29,316 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 514.0) internal successors, (12336), 24 states have internal predecessors, (12336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:29,316 INFO L175 Difference]: Start difference. First operand has 170 places, 197 transitions, 2715 flow. Second operand 23 states and 5005 transitions. [2023-11-12 02:16:29,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 308 transitions, 4579 flow [2023-11-12 02:16:29,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 308 transitions, 4262 flow, removed 123 selfloop flow, removed 6 redundant places. [2023-11-12 02:16:29,447 INFO L231 Difference]: Finished difference. Result has 190 places, 267 transitions, 3927 flow [2023-11-12 02:16:29,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=2411, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3927, PETRI_PLACES=190, PETRI_TRANSITIONS=267} [2023-11-12 02:16:29,448 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 161 predicate places. [2023-11-12 02:16:29,448 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 267 transitions, 3927 flow [2023-11-12 02:16:29,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 215.26666666666668) internal successors, (3229), 15 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:29,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:29,449 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:29,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:29,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-12 02:16:29,655 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:16:29,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:29,655 INFO L85 PathProgramCache]: Analyzing trace with hash -688855527, now seen corresponding path program 17 times [2023-11-12 02:16:29,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:29,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939280645] [2023-11-12 02:16:29,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:29,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:29,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:29,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939280645] [2023-11-12 02:16:29,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939280645] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:29,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742235407] [2023-11-12 02:16:29,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:16:29,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:29,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:29,758 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:29,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-12 02:16:29,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-12 02:16:29,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:29,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:16:29,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:29,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:29,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742235407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:29,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:29,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-12 02:16:29,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828399883] [2023-11-12 02:16:29,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:29,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:16:29,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:29,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:16:29,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:16:30,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 514 [2023-11-12 02:16:30,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 267 transitions, 3927 flow. Second operand has 13 states, 13 states have (on average 215.07692307692307) internal successors, (2796), 13 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:30,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:30,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 514 [2023-11-12 02:16:30,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:30,556 INFO L124 PetriNetUnfolderBase]: 639/1076 cut-off events. [2023-11-12 02:16:30,557 INFO L125 PetriNetUnfolderBase]: For 18808/18808 co-relation queries the response was YES. [2023-11-12 02:16:30,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8397 conditions, 1076 events. 639/1076 cut-off events. For 18808/18808 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5032 event pairs, 49 based on Foata normal form. 16/1092 useless extension candidates. Maximal degree in co-relation 8328. Up to 403 conditions per place. [2023-11-12 02:16:30,572 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 113 selfloop transitions, 212 changer transitions 0/325 dead transitions. [2023-11-12 02:16:30,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 325 transitions, 5313 flow [2023-11-12 02:16:30,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:16:30,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-12 02:16:30,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3705 transitions. [2023-11-12 02:16:30,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4240100709544518 [2023-11-12 02:16:30,580 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3705 transitions. [2023-11-12 02:16:30,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3705 transitions. [2023-11-12 02:16:30,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:30,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3705 transitions. [2023-11-12 02:16:30,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 217.94117647058823) internal successors, (3705), 17 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:30,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 514.0) internal successors, (9252), 18 states have internal predecessors, (9252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:30,598 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 514.0) internal successors, (9252), 18 states have internal predecessors, (9252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:30,598 INFO L175 Difference]: Start difference. First operand has 190 places, 267 transitions, 3927 flow. Second operand 17 states and 3705 transitions. [2023-11-12 02:16:30,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 325 transitions, 5313 flow [2023-11-12 02:16:30,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 325 transitions, 4994 flow, removed 107 selfloop flow, removed 10 redundant places. [2023-11-12 02:16:30,733 INFO L231 Difference]: Finished difference. Result has 200 places, 298 transitions, 4844 flow [2023-11-12 02:16:30,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=3581, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4844, PETRI_PLACES=200, PETRI_TRANSITIONS=298} [2023-11-12 02:16:30,735 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 171 predicate places. [2023-11-12 02:16:30,735 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 298 transitions, 4844 flow [2023-11-12 02:16:30,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 215.07692307692307) internal successors, (2796), 13 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:30,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:30,736 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:30,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:30,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-12 02:16:30,942 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:16:30,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:30,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1808008061, now seen corresponding path program 18 times [2023-11-12 02:16:30,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:30,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697958415] [2023-11-12 02:16:30,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:30,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:31,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:31,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697958415] [2023-11-12 02:16:31,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697958415] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:31,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781657305] [2023-11-12 02:16:31,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:16:31,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:31,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:31,052 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:31,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-12 02:16:31,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-12 02:16:31,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:31,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:16:31,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:31,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:31,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781657305] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:31,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:31,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-12 02:16:31,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165643693] [2023-11-12 02:16:31,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:31,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:16:31,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:31,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:16:31,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:16:31,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 514 [2023-11-12 02:16:31,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 298 transitions, 4844 flow. Second operand has 15 states, 15 states have (on average 214.8) internal successors, (3222), 15 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:31,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:31,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 514 [2023-11-12 02:16:31,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:32,061 INFO L124 PetriNetUnfolderBase]: 688/1155 cut-off events. [2023-11-12 02:16:32,062 INFO L125 PetriNetUnfolderBase]: For 26203/26203 co-relation queries the response was YES. [2023-11-12 02:16:32,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9861 conditions, 1155 events. 688/1155 cut-off events. For 26203/26203 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5462 event pairs, 151 based on Foata normal form. 28/1183 useless extension candidates. Maximal degree in co-relation 9788. Up to 993 conditions per place. [2023-11-12 02:16:32,086 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 300 selfloop transitions, 59 changer transitions 1/360 dead transitions. [2023-11-12 02:16:32,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 360 transitions, 6535 flow [2023-11-12 02:16:32,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 02:16:32,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-12 02:16:32,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 4143 transitions. [2023-11-12 02:16:32,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42422690968666804 [2023-11-12 02:16:32,092 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 4143 transitions. [2023-11-12 02:16:32,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 4143 transitions. [2023-11-12 02:16:32,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:32,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 4143 transitions. [2023-11-12 02:16:32,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 218.05263157894737) internal successors, (4143), 19 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:32,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 514.0) internal successors, (10280), 20 states have internal predecessors, (10280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:32,111 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 514.0) internal successors, (10280), 20 states have internal predecessors, (10280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:32,111 INFO L175 Difference]: Start difference. First operand has 200 places, 298 transitions, 4844 flow. Second operand 19 states and 4143 transitions. [2023-11-12 02:16:32,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 360 transitions, 6535 flow [2023-11-12 02:16:32,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 360 transitions, 6240 flow, removed 122 selfloop flow, removed 6 redundant places. [2023-11-12 02:16:32,269 INFO L231 Difference]: Finished difference. Result has 224 places, 324 transitions, 5478 flow [2023-11-12 02:16:32,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5478, PETRI_PLACES=224, PETRI_TRANSITIONS=324} [2023-11-12 02:16:32,271 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 195 predicate places. [2023-11-12 02:16:32,271 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 324 transitions, 5478 flow [2023-11-12 02:16:32,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 214.8) internal successors, (3222), 15 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:32,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:32,272 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:32,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:32,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-12 02:16:32,478 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:16:32,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:32,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1846417319, now seen corresponding path program 19 times [2023-11-12 02:16:32,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:32,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300687148] [2023-11-12 02:16:32,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:32,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:32,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:32,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300687148] [2023-11-12 02:16:32,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300687148] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:32,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694214993] [2023-11-12 02:16:32,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:16:32,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:32,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:32,567 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:32,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-12 02:16:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:32,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:16:32,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:32,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:32,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694214993] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:32,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:32,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-12 02:16:32,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751989055] [2023-11-12 02:16:32,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:32,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:16:32,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:32,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:16:32,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:16:32,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 514 [2023-11-12 02:16:32,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 324 transitions, 5478 flow. Second operand has 13 states, 13 states have (on average 214.92307692307693) internal successors, (2794), 13 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:32,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:32,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 514 [2023-11-12 02:16:32,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:33,336 INFO L124 PetriNetUnfolderBase]: 694/1161 cut-off events. [2023-11-12 02:16:33,336 INFO L125 PetriNetUnfolderBase]: For 28621/28621 co-relation queries the response was YES. [2023-11-12 02:16:33,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10199 conditions, 1161 events. 694/1161 cut-off events. For 28621/28621 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5469 event pairs, 153 based on Foata normal form. 4/1165 useless extension candidates. Maximal degree in co-relation 10113. Up to 1019 conditions per place. [2023-11-12 02:16:33,359 INFO L140 encePairwiseOnDemand]: 508/514 looper letters, 286 selfloop transitions, 56 changer transitions 2/344 dead transitions. [2023-11-12 02:16:33,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 344 transitions, 6567 flow [2023-11-12 02:16:33,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:16:33,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-12 02:16:33,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2395 transitions. [2023-11-12 02:16:33,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42359391581181466 [2023-11-12 02:16:33,364 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2395 transitions. [2023-11-12 02:16:33,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2395 transitions. [2023-11-12 02:16:33,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:33,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2395 transitions. [2023-11-12 02:16:33,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 217.72727272727272) internal successors, (2395), 11 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:33,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 514.0) internal successors, (6168), 12 states have internal predecessors, (6168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:33,376 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 514.0) internal successors, (6168), 12 states have internal predecessors, (6168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:33,376 INFO L175 Difference]: Start difference. First operand has 224 places, 324 transitions, 5478 flow. Second operand 11 states and 2395 transitions. [2023-11-12 02:16:33,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 344 transitions, 6567 flow [2023-11-12 02:16:33,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 344 transitions, 5886 flow, removed 322 selfloop flow, removed 7 redundant places. [2023-11-12 02:16:33,606 INFO L231 Difference]: Finished difference. Result has 228 places, 327 transitions, 5087 flow [2023-11-12 02:16:33,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=4886, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5087, PETRI_PLACES=228, PETRI_TRANSITIONS=327} [2023-11-12 02:16:33,607 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 199 predicate places. [2023-11-12 02:16:33,607 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 327 transitions, 5087 flow [2023-11-12 02:16:33,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 214.92307692307693) internal successors, (2794), 13 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:33,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:33,608 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:33,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c89f0991-53b4-4105-9c04-621f591415ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0