./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/bench-exp2x6.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_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/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_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/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_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/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 1f93f8af6c620ba8dc44e82cf4c30bbca874545f3e3802e43ba4e1345a3afed4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:28:54,579 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:28:54,712 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:28:54,722 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:28:54,722 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:28:54,761 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:28:54,762 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:28:54,763 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:28:54,764 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:28:54,764 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:28:54,765 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:28:54,766 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:28:54,766 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:28:54,771 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:28:54,772 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:28:54,772 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:28:54,773 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:28:54,773 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:28:54,774 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:28:54,774 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:28:54,775 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:28:54,775 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:28:54,776 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:28:54,776 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:28:54,777 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:28:54,777 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:28:54,778 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:28:54,778 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:28:54,780 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:28:54,781 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:28:54,782 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:28:54,782 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:28:54,783 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:28:54,783 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:28:54,783 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:28:54,783 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:28:54,783 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:28:54,784 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:28:54,784 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_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f93f8af6c620ba8dc44e82cf4c30bbca874545f3e3802e43ba4e1345a3afed4 [2023-11-12 02:28:55,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:28:55,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:28:55,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:28:55,158 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:28:55,159 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:28:55,160 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2023-11-12 02:28:58,401 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:28:58,641 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:28:58,642 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2023-11-12 02:28:58,651 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/data/1ac15781c/d9f030aa07414ce99b6d2b98d99dee02/FLAGe60ebc26a [2023-11-12 02:28:58,666 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/data/1ac15781c/d9f030aa07414ce99b6d2b98d99dee02 [2023-11-12 02:28:58,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:28:58,671 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:28:58,673 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:28:58,673 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:28:58,679 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:28:58,679 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:28:58" (1/1) ... [2023-11-12 02:28:58,680 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bac05dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:58, skipping insertion in model container [2023-11-12 02:28:58,681 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:28:58" (1/1) ... [2023-11-12 02:28:58,708 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:28:58,946 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:28:58,969 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:28:59,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:28:59,019 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:28:59,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:59 WrapperNode [2023-11-12 02:28:59,020 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:28:59,021 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:28:59,022 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:28:59,022 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:28:59,033 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:59" (1/1) ... [2023-11-12 02:28:59,043 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:59" (1/1) ... [2023-11-12 02:28:59,077 INFO L138 Inliner]: procedures = 20, calls = 33, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 97 [2023-11-12 02:28:59,077 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:28:59,078 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:28:59,079 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:28:59,079 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:28:59,089 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:59" (1/1) ... [2023-11-12 02:28:59,090 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:59" (1/1) ... [2023-11-12 02:28:59,101 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:59" (1/1) ... [2023-11-12 02:28:59,101 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:59" (1/1) ... [2023-11-12 02:28:59,109 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:59" (1/1) ... [2023-11-12 02:28:59,113 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:59" (1/1) ... [2023-11-12 02:28:59,115 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:59" (1/1) ... [2023-11-12 02:28:59,117 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:59" (1/1) ... [2023-11-12 02:28:59,120 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:28:59,122 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:28:59,122 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:28:59,122 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:28:59,123 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:59" (1/1) ... [2023-11-12 02:28:59,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:28:59,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:59,182 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:28:59,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:28:59,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:28:59,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:28:59,234 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:28:59,235 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:28:59,235 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:28:59,235 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-12 02:28:59,235 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-12 02:28:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-12 02:28:59,236 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-12 02:28:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:28:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:28:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:28:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:28:59,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:28:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:28:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:28:59,239 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 02:28:59,428 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:28:59,432 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:28:59,940 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:28:59,952 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:28:59,952 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 02:28:59,955 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:28:59 BoogieIcfgContainer [2023-11-12 02:28:59,955 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:28:59,959 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:28:59,959 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:28:59,963 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:28:59,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:28:58" (1/3) ... [2023-11-12 02:28:59,964 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1828be2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:28:59, skipping insertion in model container [2023-11-12 02:28:59,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:59" (2/3) ... [2023-11-12 02:28:59,965 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1828be2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:28:59, skipping insertion in model container [2023-11-12 02:28:59,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:28:59" (3/3) ... [2023-11-12 02:28:59,967 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x6.wvr.c [2023-11-12 02:28:59,990 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:28:59,990 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-12 02:28:59,990 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:29:00,202 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-12 02:29:00,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 165 transitions, 358 flow [2023-11-12 02:29:00,344 INFO L124 PetriNetUnfolderBase]: 10/161 cut-off events. [2023-11-12 02:29:00,345 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:29:00,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 161 events. 10/161 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 161 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 106. Up to 2 conditions per place. [2023-11-12 02:29:00,354 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 165 transitions, 358 flow [2023-11-12 02:29:00,361 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 156 transitions, 336 flow [2023-11-12 02:29:00,365 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:29:00,376 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 156 transitions, 336 flow [2023-11-12 02:29:00,379 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 156 transitions, 336 flow [2023-11-12 02:29:00,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 156 transitions, 336 flow [2023-11-12 02:29:00,424 INFO L124 PetriNetUnfolderBase]: 10/156 cut-off events. [2023-11-12 02:29:00,424 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:29:00,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 156 events. 10/156 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 157 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 106. Up to 2 conditions per place. [2023-11-12 02:29:00,431 INFO L119 LiptonReduction]: Number of co-enabled transitions 3160 [2023-11-12 02:29:07,052 INFO L134 LiptonReduction]: Checked pairs total: 3506 [2023-11-12 02:29:07,052 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-11-12 02:29:07,069 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:29:07,075 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;@5e50f87c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:29:07,075 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-12 02:29:07,077 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:29:07,077 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-12 02:29:07,077 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:29:07,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:07,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-12 02:29:07,078 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:29:07,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:07,083 INFO L85 PathProgramCache]: Analyzing trace with hash 599, now seen corresponding path program 1 times [2023-11-12 02:29:07,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:07,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720380893] [2023-11-12 02:29:07,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:07,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:07,183 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 02:29:07,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:07,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720380893] [2023-11-12 02:29:07,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720380893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:07,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:07,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-12 02:29:07,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639985850] [2023-11-12 02:29:07,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:07,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:29:07,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:07,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:29:07,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:29:07,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 315 [2023-11-12 02:29:07,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 116 flow. Second operand has 2 states, 2 states have (on average 150.5) internal successors, (301), 2 states have internal predecessors, (301), 0 states have call successors, (0), 0 states 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 02:29:07,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:07,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 315 [2023-11-12 02:29:07,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:07,714 INFO L124 PetriNetUnfolderBase]: 2446/3085 cut-off events. [2023-11-12 02:29:07,714 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2023-11-12 02:29:07,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6257 conditions, 3085 events. 2446/3085 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11181 event pairs, 1143 based on Foata normal form. 0/1459 useless extension candidates. Maximal degree in co-relation 4801. Up to 3047 conditions per place. [2023-11-12 02:29:07,750 INFO L140 encePairwiseOnDemand]: 312/315 looper letters, 39 selfloop transitions, 0 changer transitions 0/43 dead transitions. [2023-11-12 02:29:07,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 43 transitions, 188 flow [2023-11-12 02:29:07,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:29:07,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:29:07,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 342 transitions. [2023-11-12 02:29:07,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2023-11-12 02:29:07,777 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 342 transitions. [2023-11-12 02:29:07,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 342 transitions. [2023-11-12 02:29:07,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:07,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 342 transitions. [2023-11-12 02:29:07,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 171.0) internal successors, (342), 2 states have internal predecessors, (342), 0 states have call successors, (0), 0 states 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 02:29:07,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 315.0) internal successors, (945), 3 states have internal predecessors, (945), 0 states have call successors, (0), 0 states 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 02:29:07,799 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 315.0) internal successors, (945), 3 states have internal predecessors, (945), 0 states have call successors, (0), 0 states 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 02:29:07,801 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 116 flow. Second operand 2 states and 342 transitions. [2023-11-12 02:29:07,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 43 transitions, 188 flow [2023-11-12 02:29:07,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-12 02:29:07,813 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 94 flow [2023-11-12 02:29:07,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-11-12 02:29:07,820 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -10 predicate places. [2023-11-12 02:29:07,820 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 94 flow [2023-11-12 02:29:07,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 150.5) internal successors, (301), 2 states have internal predecessors, (301), 0 states have call successors, (0), 0 states 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 02:29:07,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:07,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:29:07,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:29:07,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:29:07,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:07,823 INFO L85 PathProgramCache]: Analyzing trace with hash 589984, now seen corresponding path program 1 times [2023-11-12 02:29:07,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:07,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861163445] [2023-11-12 02:29:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:07,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:08,359 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 02:29:08,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:08,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861163445] [2023-11-12 02:29:08,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861163445] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:08,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:08,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:29:08,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121202874] [2023-11-12 02:29:08,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:08,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:08,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:08,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:08,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:08,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 315 [2023-11-12 02:29:08,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states 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 02:29:08,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:08,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 315 [2023-11-12 02:29:08,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:08,796 INFO L124 PetriNetUnfolderBase]: 2335/2944 cut-off events. [2023-11-12 02:29:08,797 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-12 02:29:08,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5892 conditions, 2944 events. 2335/2944 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 10549 event pairs, 1088 based on Foata normal form. 0/1404 useless extension candidates. Maximal degree in co-relation 5889. Up to 2905 conditions per place. [2023-11-12 02:29:08,825 INFO L140 encePairwiseOnDemand]: 312/315 looper letters, 36 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-12 02:29:08,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 164 flow [2023-11-12 02:29:08,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:08,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:08,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-11-12 02:29:08,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4984126984126984 [2023-11-12 02:29:08,831 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-11-12 02:29:08,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-11-12 02:29:08,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:08,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-11-12 02:29:08,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states 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 02:29:08,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 02:29:08,840 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 02:29:08,841 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 94 flow. Second operand 3 states and 471 transitions. [2023-11-12 02:29:08,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 164 flow [2023-11-12 02:29:08,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:29:08,847 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 92 flow [2023-11-12 02:29:08,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-11-12 02:29:08,849 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -10 predicate places. [2023-11-12 02:29:08,849 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 92 flow [2023-11-12 02:29:08,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states 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 02:29:08,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:08,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:29:08,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:29:08,857 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:29:08,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:08,859 INFO L85 PathProgramCache]: Analyzing trace with hash 589983, now seen corresponding path program 1 times [2023-11-12 02:29:08,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:08,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790478456] [2023-11-12 02:29:08,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:08,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:08,997 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 02:29:08,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:08,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790478456] [2023-11-12 02:29:08,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790478456] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:08,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:08,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:29:08,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874610948] [2023-11-12 02:29:08,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:08,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:09,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:09,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:09,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:09,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 315 [2023-11-12 02:29:09,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:09,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:09,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 315 [2023-11-12 02:29:09,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:09,368 INFO L124 PetriNetUnfolderBase]: 2224/2803 cut-off events. [2023-11-12 02:29:09,368 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-12 02:29:09,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5612 conditions, 2803 events. 2224/2803 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 9954 event pairs, 1033 based on Foata normal form. 0/1349 useless extension candidates. Maximal degree in co-relation 5608. Up to 2764 conditions per place. [2023-11-12 02:29:09,391 INFO L140 encePairwiseOnDemand]: 312/315 looper letters, 34 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-11-12 02:29:09,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 158 flow [2023-11-12 02:29:09,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:09,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:09,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2023-11-12 02:29:09,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47724867724867726 [2023-11-12 02:29:09,394 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2023-11-12 02:29:09,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2023-11-12 02:29:09,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:09,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2023-11-12 02:29:09,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 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 02:29:09,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 02:29:09,401 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 02:29:09,401 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 92 flow. Second operand 3 states and 451 transitions. [2023-11-12 02:29:09,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 158 flow [2023-11-12 02:29:09,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:09,403 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 89 flow [2023-11-12 02:29:09,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-11-12 02:29:09,404 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -11 predicate places. [2023-11-12 02:29:09,405 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 89 flow [2023-11-12 02:29:09,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:09,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:09,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:29:09,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:29:09,406 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:29:09,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:09,407 INFO L85 PathProgramCache]: Analyzing trace with hash 566985954, now seen corresponding path program 1 times [2023-11-12 02:29:09,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:09,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432769748] [2023-11-12 02:29:09,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:09,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:09,492 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 02:29:09,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:09,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432769748] [2023-11-12 02:29:09,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432769748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:09,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:09,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:29:09,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184180532] [2023-11-12 02:29:09,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:09,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:09,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:09,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:09,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:09,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 315 [2023-11-12 02:29:09,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:09,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:09,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 315 [2023-11-12 02:29:09,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:09,902 INFO L124 PetriNetUnfolderBase]: 2178/2739 cut-off events. [2023-11-12 02:29:09,903 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-12 02:29:09,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5485 conditions, 2739 events. 2178/2739 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 9698 event pairs, 1011 based on Foata normal form. 0/1325 useless extension candidates. Maximal degree in co-relation 5481. Up to 2700 conditions per place. [2023-11-12 02:29:09,927 INFO L140 encePairwiseOnDemand]: 312/315 looper letters, 32 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-11-12 02:29:09,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 151 flow [2023-11-12 02:29:09,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:09,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:09,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-11-12 02:29:09,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47513227513227513 [2023-11-12 02:29:09,930 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-11-12 02:29:09,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-11-12 02:29:09,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:09,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-11-12 02:29:09,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states 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 02:29:09,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 02:29:09,937 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 02:29:09,937 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 89 flow. Second operand 3 states and 449 transitions. [2023-11-12 02:29:09,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 151 flow [2023-11-12 02:29:09,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 37 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:09,940 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 86 flow [2023-11-12 02:29:09,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-11-12 02:29:09,941 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -12 predicate places. [2023-11-12 02:29:09,941 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 86 flow [2023-11-12 02:29:09,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:09,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:09,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:29:09,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:29:09,943 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:29:09,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:09,943 INFO L85 PathProgramCache]: Analyzing trace with hash 566985953, now seen corresponding path program 1 times [2023-11-12 02:29:09,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:09,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969222455] [2023-11-12 02:29:09,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:09,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:10,060 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 02:29:10,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:10,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969222455] [2023-11-12 02:29:10,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969222455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:10,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:10,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:29:10,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757221152] [2023-11-12 02:29:10,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:10,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:10,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:10,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:10,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:10,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 315 [2023-11-12 02:29:10,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 02:29:10,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:10,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 315 [2023-11-12 02:29:10,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:10,422 INFO L124 PetriNetUnfolderBase]: 2132/2675 cut-off events. [2023-11-12 02:29:10,423 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-12 02:29:10,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5358 conditions, 2675 events. 2132/2675 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 9366 event pairs, 989 based on Foata normal form. 0/1301 useless extension candidates. Maximal degree in co-relation 5354. Up to 2636 conditions per place. [2023-11-12 02:29:10,445 INFO L140 encePairwiseOnDemand]: 312/315 looper letters, 30 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-11-12 02:29:10,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 144 flow [2023-11-12 02:29:10,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:10,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:10,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-11-12 02:29:10,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2023-11-12 02:29:10,448 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-11-12 02:29:10,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-11-12 02:29:10,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:10,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-11-12 02:29:10,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states 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 02:29:10,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 02:29:10,455 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 02:29:10,455 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 86 flow. Second operand 3 states and 465 transitions. [2023-11-12 02:29:10,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 144 flow [2023-11-12 02:29:10,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 35 transitions, 143 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:10,457 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 83 flow [2023-11-12 02:29:10,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-11-12 02:29:10,460 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -13 predicate places. [2023-11-12 02:29:10,460 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 83 flow [2023-11-12 02:29:10,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 02:29:10,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:10,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:10,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:29:10,461 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:29:10,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:10,461 INFO L85 PathProgramCache]: Analyzing trace with hash -587333287, now seen corresponding path program 1 times [2023-11-12 02:29:10,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:10,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749190061] [2023-11-12 02:29:10,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:10,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:10,563 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 02:29:10,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:10,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749190061] [2023-11-12 02:29:10,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749190061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:10,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:10,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:29:10,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985191660] [2023-11-12 02:29:10,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:10,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:10,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:10,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:10,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:10,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 315 [2023-11-12 02:29:10,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states 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 02:29:10,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:10,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 315 [2023-11-12 02:29:10,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:10,876 INFO L124 PetriNetUnfolderBase]: 2029/2542 cut-off events. [2023-11-12 02:29:10,876 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-12 02:29:10,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5093 conditions, 2542 events. 2029/2542 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 8809 event pairs, 942 based on Foata normal form. 0/1245 useless extension candidates. Maximal degree in co-relation 5089. Up to 2503 conditions per place. [2023-11-12 02:29:10,904 INFO L140 encePairwiseOnDemand]: 312/315 looper letters, 28 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-11-12 02:29:10,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 137 flow [2023-11-12 02:29:10,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:10,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:10,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2023-11-12 02:29:10,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48994708994708996 [2023-11-12 02:29:10,907 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2023-11-12 02:29:10,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2023-11-12 02:29:10,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:10,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2023-11-12 02:29:10,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states 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 02:29:10,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 02:29:10,914 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 02:29:10,914 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 83 flow. Second operand 3 states and 463 transitions. [2023-11-12 02:29:10,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 137 flow [2023-11-12 02:29:10,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:10,918 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 80 flow [2023-11-12 02:29:10,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-11-12 02:29:10,921 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -14 predicate places. [2023-11-12 02:29:10,925 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 80 flow [2023-11-12 02:29:10,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states 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 02:29:10,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:10,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:10,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:29:10,926 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:29:10,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:10,927 INFO L85 PathProgramCache]: Analyzing trace with hash -587333288, now seen corresponding path program 1 times [2023-11-12 02:29:10,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:10,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13618426] [2023-11-12 02:29:10,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:10,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:11,004 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 02:29:11,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:11,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13618426] [2023-11-12 02:29:11,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13618426] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:11,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:11,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:29:11,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067968435] [2023-11-12 02:29:11,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:11,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:11,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:11,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:11,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:11,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 315 [2023-11-12 02:29:11,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states 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 02:29:11,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:11,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 315 [2023-11-12 02:29:11,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:11,292 INFO L124 PetriNetUnfolderBase]: 1926/2409 cut-off events. [2023-11-12 02:29:11,292 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-12 02:29:11,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4828 conditions, 2409 events. 1926/2409 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 8244 event pairs, 895 based on Foata normal form. 0/1189 useless extension candidates. Maximal degree in co-relation 4824. Up to 2370 conditions per place. [2023-11-12 02:29:11,308 INFO L140 encePairwiseOnDemand]: 312/315 looper letters, 26 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-11-12 02:29:11,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 31 transitions, 130 flow [2023-11-12 02:29:11,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:11,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:11,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-11-12 02:29:11,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4687830687830688 [2023-11-12 02:29:11,311 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-11-12 02:29:11,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-11-12 02:29:11,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:11,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-11-12 02:29:11,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states 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 02:29:11,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 02:29:11,317 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 02:29:11,317 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 80 flow. Second operand 3 states and 443 transitions. [2023-11-12 02:29:11,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 31 transitions, 130 flow [2023-11-12 02:29:11,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 31 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:11,320 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 77 flow [2023-11-12 02:29:11,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-11-12 02:29:11,321 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-11-12 02:29:11,321 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 77 flow [2023-11-12 02:29:11,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states 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 02:29:11,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:11,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:11,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:29:11,322 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:29:11,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:11,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1786561685, now seen corresponding path program 1 times [2023-11-12 02:29:11,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:11,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763588451] [2023-11-12 02:29:11,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:11,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:11,666 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 02:29:11,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:11,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763588451] [2023-11-12 02:29:11,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763588451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:11,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:11,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:29:11,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085544009] [2023-11-12 02:29:11,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:11,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:29:11,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:11,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:29:11,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:29:11,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 315 [2023-11-12 02:29:11,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 77 flow. Second operand has 4 states, 4 states have (on average 138.25) internal successors, (553), 4 states have internal predecessors, (553), 0 states have call successors, (0), 0 states 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 02:29:11,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:11,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 315 [2023-11-12 02:29:11,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:11,945 INFO L124 PetriNetUnfolderBase]: 1521/1923 cut-off events. [2023-11-12 02:29:11,946 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-12 02:29:11,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3857 conditions, 1923 events. 1521/1923 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 6399 event pairs, 706 based on Foata normal form. 0/1000 useless extension candidates. Maximal degree in co-relation 3853. Up to 1884 conditions per place. [2023-11-12 02:29:11,960 INFO L140 encePairwiseOnDemand]: 313/315 looper letters, 25 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-11-12 02:29:11,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 30 transitions, 127 flow [2023-11-12 02:29:11,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:11,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2023-11-12 02:29:11,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2023-11-12 02:29:11,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2023-11-12 02:29:11,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2023-11-12 02:29:11,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:11,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2023-11-12 02:29:11,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states 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 02:29:11,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 02:29:11,968 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 02:29:11,968 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 77 flow. Second operand 3 states and 435 transitions. [2023-11-12 02:29:11,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 30 transitions, 127 flow [2023-11-12 02:29:11,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:11,971 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 76 flow [2023-11-12 02:29:11,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-11-12 02:29:11,973 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-11-12 02:29:11,974 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 76 flow [2023-11-12 02:29:11,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.25) internal successors, (553), 4 states have internal predecessors, (553), 0 states have call successors, (0), 0 states 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 02:29:11,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:11,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:11,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:29:11,975 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:29:11,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:11,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1786561683, now seen corresponding path program 1 times [2023-11-12 02:29:11,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:11,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855563588] [2023-11-12 02:29:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:11,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:12,139 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 02:29:12,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:12,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855563588] [2023-11-12 02:29:12,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855563588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:12,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:12,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:29:12,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746482163] [2023-11-12 02:29:12,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:12,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:29:12,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:12,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:29:12,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:29:12,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 315 [2023-11-12 02:29:12,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 76 flow. Second operand has 6 states, 6 states have (on average 127.5) internal successors, (765), 6 states have internal predecessors, (765), 0 states have call successors, (0), 0 states 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 02:29:12,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:12,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 315 [2023-11-12 02:29:12,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:12,501 INFO L124 PetriNetUnfolderBase]: 1116/1437 cut-off events. [2023-11-12 02:29:12,501 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-12 02:29:12,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2886 conditions, 1437 events. 1116/1437 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4699 event pairs, 517 based on Foata normal form. 0/811 useless extension candidates. Maximal degree in co-relation 2882. Up to 1398 conditions per place. [2023-11-12 02:29:12,509 INFO L140 encePairwiseOnDemand]: 313/315 looper letters, 24 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-11-12 02:29:12,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 29 transitions, 124 flow [2023-11-12 02:29:12,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:12,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:12,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2023-11-12 02:29:12,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275132275132275 [2023-11-12 02:29:12,512 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2023-11-12 02:29:12,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2023-11-12 02:29:12,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:12,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2023-11-12 02:29:12,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:12,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 02:29:12,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 02:29:12,518 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 76 flow. Second operand 3 states and 404 transitions. [2023-11-12 02:29:12,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 29 transitions, 124 flow [2023-11-12 02:29:12,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 29 transitions, 123 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:12,519 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 75 flow [2023-11-12 02:29:12,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-11-12 02:29:12,520 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-11-12 02:29:12,521 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 75 flow [2023-11-12 02:29:12,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 127.5) internal successors, (765), 6 states have internal predecessors, (765), 0 states have call successors, (0), 0 states 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 02:29:12,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:12,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:12,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:29:12,522 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:29:12,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:12,523 INFO L85 PathProgramCache]: Analyzing trace with hash 2016409330, now seen corresponding path program 1 times [2023-11-12 02:29:12,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:12,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696525802] [2023-11-12 02:29:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:12,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:12,668 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 02:29:12,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:12,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696525802] [2023-11-12 02:29:12,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696525802] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:12,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:12,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:29:12,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608661267] [2023-11-12 02:29:12,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:12,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:12,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:12,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:12,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:12,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 315 [2023-11-12 02:29:12,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states 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 02:29:12,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:12,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 315 [2023-11-12 02:29:12,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:13,009 INFO L124 PetriNetUnfolderBase]: 1537/1954 cut-off events. [2023-11-12 02:29:13,010 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-11-12 02:29:13,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3956 conditions, 1954 events. 1537/1954 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6328 event pairs, 141 based on Foata normal form. 1/1130 useless extension candidates. Maximal degree in co-relation 3952. Up to 1733 conditions per place. [2023-11-12 02:29:13,021 INFO L140 encePairwiseOnDemand]: 309/315 looper letters, 41 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2023-11-12 02:29:13,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 220 flow [2023-11-12 02:29:13,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:13,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2023-11-12 02:29:13,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4507936507936508 [2023-11-12 02:29:13,024 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2023-11-12 02:29:13,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2023-11-12 02:29:13,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:13,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2023-11-12 02:29:13,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states 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 02:29:13,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 02:29:13,030 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 02:29:13,030 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 75 flow. Second operand 3 states and 426 transitions. [2023-11-12 02:29:13,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 220 flow [2023-11-12 02:29:13,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 51 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:13,032 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 107 flow [2023-11-12 02:29:13,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-11-12 02:29:13,034 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -13 predicate places. [2023-11-12 02:29:13,034 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 107 flow [2023-11-12 02:29:13,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states 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 02:29:13,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:13,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:13,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 02:29:13,035 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:29:13,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:13,036 INFO L85 PathProgramCache]: Analyzing trace with hash 936972616, now seen corresponding path program 1 times [2023-11-12 02:29:13,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:13,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258413668] [2023-11-12 02:29:13,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:13,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:13,260 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 02:29:13,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:13,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258413668] [2023-11-12 02:29:13,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258413668] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:13,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:13,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:29:13,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201978508] [2023-11-12 02:29:13,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:13,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:29:13,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:13,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:29:13,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:29:13,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 315 [2023-11-12 02:29:13,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 02:29:13,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:13,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 315 [2023-11-12 02:29:13,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:13,747 INFO L124 PetriNetUnfolderBase]: 1837/2360 cut-off events. [2023-11-12 02:29:13,747 INFO L125 PetriNetUnfolderBase]: For 571/571 co-relation queries the response was YES. [2023-11-12 02:29:13,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5865 conditions, 2360 events. 1837/2360 cut-off events. For 571/571 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 8367 event pairs, 138 based on Foata normal form. 34/2384 useless extension candidates. Maximal degree in co-relation 5860. Up to 964 conditions per place. [2023-11-12 02:29:13,765 INFO L140 encePairwiseOnDemand]: 310/315 looper letters, 72 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2023-11-12 02:29:13,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 86 transitions, 421 flow [2023-11-12 02:29:13,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:29:13,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:29:13,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 736 transitions. [2023-11-12 02:29:13,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46730158730158733 [2023-11-12 02:29:13,769 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 736 transitions. [2023-11-12 02:29:13,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 736 transitions. [2023-11-12 02:29:13,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:13,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 736 transitions. [2023-11-12 02:29:13,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 states 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 02:29:13,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 02:29:13,777 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 02:29:13,778 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 107 flow. Second operand 5 states and 736 transitions. [2023-11-12 02:29:13,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 86 transitions, 421 flow [2023-11-12 02:29:13,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 86 transitions, 413 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:13,782 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 167 flow [2023-11-12 02:29:13,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=167, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2023-11-12 02:29:13,783 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -8 predicate places. [2023-11-12 02:29:13,783 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 167 flow [2023-11-12 02:29:13,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 02:29:13,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:13,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:13,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 02:29:13,785 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:29:13,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:13,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1710497499, now seen corresponding path program 1 times [2023-11-12 02:29:13,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:13,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106487701] [2023-11-12 02:29:13,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:13,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:13,927 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 02:29:13,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:13,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106487701] [2023-11-12 02:29:13,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106487701] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:29:13,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569157472] [2023-11-12 02:29:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:13,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:13,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:13,935 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:13,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:29:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:14,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:29:14,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:14,250 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 02:29:14,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:29:14,366 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 02:29:14,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569157472] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:29:14,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:29:14,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-12 02:29:14,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103131473] [2023-11-12 02:29:14,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:29:14,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:29:14,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:14,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:29:14,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:29:14,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 315 [2023-11-12 02:29:14,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 167 flow. Second operand has 6 states, 6 states have (on average 137.5) internal successors, (825), 6 states have internal predecessors, (825), 0 states have call successors, (0), 0 states 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 02:29:14,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:14,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 315 [2023-11-12 02:29:14,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:15,014 INFO L124 PetriNetUnfolderBase]: 2211/2944 cut-off events. [2023-11-12 02:29:15,014 INFO L125 PetriNetUnfolderBase]: For 3599/3599 co-relation queries the response was YES. [2023-11-12 02:29:15,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9003 conditions, 2944 events. 2211/2944 cut-off events. For 3599/3599 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11944 event pairs, 330 based on Foata normal form. 80/2972 useless extension candidates. Maximal degree in co-relation 8996. Up to 1265 conditions per place. [2023-11-12 02:29:15,043 INFO L140 encePairwiseOnDemand]: 310/315 looper letters, 90 selfloop transitions, 8 changer transitions 0/102 dead transitions. [2023-11-12 02:29:15,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 102 transitions, 621 flow [2023-11-12 02:29:15,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:29:15,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:29:15,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 734 transitions. [2023-11-12 02:29:15,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.466031746031746 [2023-11-12 02:29:15,047 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 734 transitions. [2023-11-12 02:29:15,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 734 transitions. [2023-11-12 02:29:15,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:15,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 734 transitions. [2023-11-12 02:29:15,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.8) internal successors, (734), 5 states have internal predecessors, (734), 0 states have call successors, (0), 0 states 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 02:29:15,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 02:29:15,055 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 02:29:15,056 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 167 flow. Second operand 5 states and 734 transitions. [2023-11-12 02:29:15,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 102 transitions, 621 flow [2023-11-12 02:29:15,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 102 transitions, 621 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:29:15,064 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 222 flow [2023-11-12 02:29:15,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=222, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-11-12 02:29:15,066 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2023-11-12 02:29:15,066 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 222 flow [2023-11-12 02:29:15,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 137.5) internal successors, (825), 6 states have internal predecessors, (825), 0 states have call successors, (0), 0 states 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 02:29:15,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:15,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:15,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:15,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 02:29:15,275 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:29:15,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:15,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1510509754, now seen corresponding path program 2 times [2023-11-12 02:29:15,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:15,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487251012] [2023-11-12 02:29:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:15,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:15,394 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 02:29:15,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:15,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487251012] [2023-11-12 02:29:15,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487251012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:15,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:15,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:29:15,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438055646] [2023-11-12 02:29:15,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:15,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:29:15,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:15,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:29:15,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:29:15,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 315 [2023-11-12 02:29:15,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 02:29:15,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:15,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 315 [2023-11-12 02:29:15,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:15,994 INFO L124 PetriNetUnfolderBase]: 2111/2826 cut-off events. [2023-11-12 02:29:15,994 INFO L125 PetriNetUnfolderBase]: For 4795/4819 co-relation queries the response was YES. [2023-11-12 02:29:16,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10433 conditions, 2826 events. 2111/2826 cut-off events. For 4795/4819 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 11763 event pairs, 435 based on Foata normal form. 108/2912 useless extension candidates. Maximal degree in co-relation 10422. Up to 1605 conditions per place. [2023-11-12 02:29:16,025 INFO L140 encePairwiseOnDemand]: 310/315 looper letters, 90 selfloop transitions, 10 changer transitions 0/104 dead transitions. [2023-11-12 02:29:16,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 104 transitions, 683 flow [2023-11-12 02:29:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:29:16,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:29:16,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 736 transitions. [2023-11-12 02:29:16,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46730158730158733 [2023-11-12 02:29:16,030 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 736 transitions. [2023-11-12 02:29:16,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 736 transitions. [2023-11-12 02:29:16,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:16,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 736 transitions. [2023-11-12 02:29:16,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 states 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 02:29:16,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 02:29:16,038 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 02:29:16,038 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 222 flow. Second operand 5 states and 736 transitions. [2023-11-12 02:29:16,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 104 transitions, 683 flow [2023-11-12 02:29:16,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 104 transitions, 683 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:29:16,055 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 276 flow [2023-11-12 02:29:16,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=276, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2023-11-12 02:29:16,057 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2023-11-12 02:29:16,057 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 276 flow [2023-11-12 02:29:16,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 02:29:16,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:16,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:16,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 02:29:16,058 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:29:16,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:16,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1258105949, now seen corresponding path program 1 times [2023-11-12 02:29:16,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:16,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005026372] [2023-11-12 02:29:16,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:16,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:16,217 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 02:29:16,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:16,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005026372] [2023-11-12 02:29:16,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005026372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:16,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:16,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:29:16,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275427274] [2023-11-12 02:29:16,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:16,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:29:16,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:16,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:29:16,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:29:16,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 315 [2023-11-12 02:29:16,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 276 flow. Second operand has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 02:29:16,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:16,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 315 [2023-11-12 02:29:16,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:16,872 INFO L124 PetriNetUnfolderBase]: 2045/2747 cut-off events. [2023-11-12 02:29:16,872 INFO L125 PetriNetUnfolderBase]: For 7532/7538 co-relation queries the response was YES. [2023-11-12 02:29:16,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11170 conditions, 2747 events. 2045/2747 cut-off events. For 7532/7538 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 11528 event pairs, 165 based on Foata normal form. 67/2807 useless extension candidates. Maximal degree in co-relation 11156. Up to 1169 conditions per place. [2023-11-12 02:29:16,898 INFO L140 encePairwiseOnDemand]: 310/315 looper letters, 91 selfloop transitions, 8 changer transitions 0/103 dead transitions. [2023-11-12 02:29:16,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 103 transitions, 707 flow [2023-11-12 02:29:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:29:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:29:16,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 735 transitions. [2023-11-12 02:29:16,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-11-12 02:29:16,902 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 735 transitions. [2023-11-12 02:29:16,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 735 transitions. [2023-11-12 02:29:16,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:16,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 735 transitions. [2023-11-12 02:29:16,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states 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 02:29:16,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 02:29:16,911 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 02:29:16,911 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 276 flow. Second operand 5 states and 735 transitions. [2023-11-12 02:29:16,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 103 transitions, 707 flow [2023-11-12 02:29:16,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 103 transitions, 698 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:16,939 INFO L231 Difference]: Finished difference. Result has 64 places, 47 transitions, 281 flow [2023-11-12 02:29:16,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=281, PETRI_PLACES=64, PETRI_TRANSITIONS=47} [2023-11-12 02:29:16,940 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2023-11-12 02:29:16,940 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 47 transitions, 281 flow [2023-11-12 02:29:16,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 02:29:16,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:16,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:16,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 02:29:16,942 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:29:16,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:16,942 INFO L85 PathProgramCache]: Analyzing trace with hash -244585206, now seen corresponding path program 1 times [2023-11-12 02:29:16,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:16,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563543470] [2023-11-12 02:29:16,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:16,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:17,075 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 02:29:17,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:17,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563543470] [2023-11-12 02:29:17,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563543470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:17,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:17,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:29:17,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633631649] [2023-11-12 02:29:17,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:17,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:29:17,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:17,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:29:17,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:29:17,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 315 [2023-11-12 02:29:17,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 47 transitions, 281 flow. Second operand has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 02:29:17,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:17,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 315 [2023-11-12 02:29:17,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:17,668 INFO L124 PetriNetUnfolderBase]: 2003/2723 cut-off events. [2023-11-12 02:29:17,668 INFO L125 PetriNetUnfolderBase]: For 8519/8519 co-relation queries the response was YES. [2023-11-12 02:29:17,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11354 conditions, 2723 events. 2003/2723 cut-off events. For 8519/8519 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 11104 event pairs, 75 based on Foata normal form. 42/2735 useless extension candidates. Maximal degree in co-relation 11339. Up to 1137 conditions per place. [2023-11-12 02:29:17,694 INFO L140 encePairwiseOnDemand]: 310/315 looper letters, 104 selfloop transitions, 10 changer transitions 0/118 dead transitions. [2023-11-12 02:29:17,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 118 transitions, 943 flow [2023-11-12 02:29:17,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:29:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:29:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 732 transitions. [2023-11-12 02:29:17,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46476190476190476 [2023-11-12 02:29:17,699 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 732 transitions. [2023-11-12 02:29:17,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 732 transitions. [2023-11-12 02:29:17,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:17,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 732 transitions. [2023-11-12 02:29:17,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 0 states have call successors, (0), 0 states 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 02:29:17,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 02:29:17,707 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 02:29:17,707 INFO L175 Difference]: Start difference. First operand has 64 places, 47 transitions, 281 flow. Second operand 5 states and 732 transitions. [2023-11-12 02:29:17,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 118 transitions, 943 flow [2023-11-12 02:29:17,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 118 transitions, 918 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:17,721 INFO L231 Difference]: Finished difference. Result has 68 places, 52 transitions, 335 flow [2023-11-12 02:29:17,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=335, PETRI_PLACES=68, PETRI_TRANSITIONS=52} [2023-11-12 02:29:17,723 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2023-11-12 02:29:17,724 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 52 transitions, 335 flow [2023-11-12 02:29:17,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 02:29:17,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:17,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:17,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-12 02:29:17,725 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:29:17,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:17,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1762714412, now seen corresponding path program 2 times [2023-11-12 02:29:17,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:17,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539665745] [2023-11-12 02:29:17,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:17,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:17,862 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 02:29:17,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:17,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539665745] [2023-11-12 02:29:17,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539665745] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:17,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:17,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:29:17,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796448862] [2023-11-12 02:29:17,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:17,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:29:17,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:17,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:29:17,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:29:17,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 315 [2023-11-12 02:29:17,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 52 transitions, 335 flow. Second operand has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 02:29:17,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:17,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 315 [2023-11-12 02:29:17,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:18,379 INFO L124 PetriNetUnfolderBase]: 1927/2659 cut-off events. [2023-11-12 02:29:18,380 INFO L125 PetriNetUnfolderBase]: For 8476/8476 co-relation queries the response was YES. [2023-11-12 02:29:18,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11786 conditions, 2659 events. 1927/2659 cut-off events. For 8476/8476 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 11371 event pairs, 293 based on Foata normal form. 76/2693 useless extension candidates. Maximal degree in co-relation 11769. Up to 1593 conditions per place. [2023-11-12 02:29:18,405 INFO L140 encePairwiseOnDemand]: 310/315 looper letters, 101 selfloop transitions, 10 changer transitions 0/115 dead transitions. [2023-11-12 02:29:18,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 115 transitions, 945 flow [2023-11-12 02:29:18,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:29:18,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:29:18,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 728 transitions. [2023-11-12 02:29:18,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622222222222222 [2023-11-12 02:29:18,409 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 728 transitions. [2023-11-12 02:29:18,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 728 transitions. [2023-11-12 02:29:18,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:18,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 728 transitions. [2023-11-12 02:29:18,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states 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 02:29:18,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 02:29:18,416 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 02:29:18,416 INFO L175 Difference]: Start difference. First operand has 68 places, 52 transitions, 335 flow. Second operand 5 states and 728 transitions. [2023-11-12 02:29:18,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 115 transitions, 945 flow [2023-11-12 02:29:18,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 115 transitions, 930 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:18,431 INFO L231 Difference]: Finished difference. Result has 73 places, 55 transitions, 374 flow [2023-11-12 02:29:18,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=374, PETRI_PLACES=73, PETRI_TRANSITIONS=55} [2023-11-12 02:29:18,431 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2023-11-12 02:29:18,432 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 55 transitions, 374 flow [2023-11-12 02:29:18,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 02:29:18,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:18,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:18,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-12 02:29:18,433 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:29:18,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:18,433 INFO L85 PathProgramCache]: Analyzing trace with hash 53927243, now seen corresponding path program 2 times [2023-11-12 02:29:18,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:18,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132243509] [2023-11-12 02:29:18,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:18,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:18,535 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 02:29:18,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:18,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132243509] [2023-11-12 02:29:18,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132243509] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:18,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:18,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:29:18,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613459331] [2023-11-12 02:29:18,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:18,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:29:18,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:18,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:29:18,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:29:18,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 315 [2023-11-12 02:29:18,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 55 transitions, 374 flow. Second operand has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 02:29:18,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:18,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 315 [2023-11-12 02:29:18,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:18,995 INFO L124 PetriNetUnfolderBase]: 1725/2361 cut-off events. [2023-11-12 02:29:18,995 INFO L125 PetriNetUnfolderBase]: For 8217/8217 co-relation queries the response was YES. [2023-11-12 02:29:19,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11109 conditions, 2361 events. 1725/2361 cut-off events. For 8217/8217 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9362 event pairs, 83 based on Foata normal form. 38/2369 useless extension candidates. Maximal degree in co-relation 11089. Up to 987 conditions per place. [2023-11-12 02:29:19,021 INFO L140 encePairwiseOnDemand]: 310/315 looper letters, 101 selfloop transitions, 9 changer transitions 4/118 dead transitions. [2023-11-12 02:29:19,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 118 transitions, 972 flow [2023-11-12 02:29:19,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:29:19,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:29:19,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 731 transitions. [2023-11-12 02:29:19,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641269841269841 [2023-11-12 02:29:19,025 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 731 transitions. [2023-11-12 02:29:19,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 731 transitions. [2023-11-12 02:29:19,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:19,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 731 transitions. [2023-11-12 02:29:19,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 0 states have call successors, (0), 0 states 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 02:29:19,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 02:29:19,033 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 02:29:19,033 INFO L175 Difference]: Start difference. First operand has 73 places, 55 transitions, 374 flow. Second operand 5 states and 731 transitions. [2023-11-12 02:29:19,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 118 transitions, 972 flow [2023-11-12 02:29:19,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 118 transitions, 952 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-12 02:29:19,058 INFO L231 Difference]: Finished difference. Result has 76 places, 54 transitions, 369 flow [2023-11-12 02:29:19,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=369, PETRI_PLACES=76, PETRI_TRANSITIONS=54} [2023-11-12 02:29:19,058 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2023-11-12 02:29:19,059 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 54 transitions, 369 flow [2023-11-12 02:29:19,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 02:29:19,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:19,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:19,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-12 02:29:19,060 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:29:19,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:19,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1996628061, now seen corresponding path program 2 times [2023-11-12 02:29:19,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:19,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545273216] [2023-11-12 02:29:19,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:19,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:19,174 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 02:29:19,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:19,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545273216] [2023-11-12 02:29:19,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545273216] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:29:19,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332281753] [2023-11-12 02:29:19,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:29:19,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:19,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:19,176 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:19,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:29:19,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:29:19,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:29:19,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:29:19,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:19,414 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 02:29:19,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:29:19,479 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 02:29:19,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332281753] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:29:19,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:29:19,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-12 02:29:19,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802461273] [2023-11-12 02:29:19,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:29:19,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:29:19,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:19,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:29:19,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:29:19,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 315 [2023-11-12 02:29:19,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 54 transitions, 369 flow. Second operand has 6 states, 6 states have (on average 137.16666666666666) internal successors, (823), 6 states have internal predecessors, (823), 0 states have call successors, (0), 0 states 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 02:29:19,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:19,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 315 [2023-11-12 02:29:19,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:20,039 INFO L124 PetriNetUnfolderBase]: 1657/2288 cut-off events. [2023-11-12 02:29:20,039 INFO L125 PetriNetUnfolderBase]: For 8612/8636 co-relation queries the response was YES. [2023-11-12 02:29:20,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10957 conditions, 2288 events. 1657/2288 cut-off events. For 8612/8636 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9626 event pairs, 481 based on Foata normal form. 72/2342 useless extension candidates. Maximal degree in co-relation 10937. Up to 1331 conditions per place. [2023-11-12 02:29:20,063 INFO L140 encePairwiseOnDemand]: 310/315 looper letters, 117 selfloop transitions, 8 changer transitions 0/129 dead transitions. [2023-11-12 02:29:20,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 129 transitions, 1107 flow [2023-11-12 02:29:20,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:29:20,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:29:20,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 732 transitions. [2023-11-12 02:29:20,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46476190476190476 [2023-11-12 02:29:20,068 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 732 transitions. [2023-11-12 02:29:20,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 732 transitions. [2023-11-12 02:29:20,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:20,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 732 transitions. [2023-11-12 02:29:20,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 0 states have call successors, (0), 0 states 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 02:29:20,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 02:29:20,074 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 02:29:20,074 INFO L175 Difference]: Start difference. First operand has 76 places, 54 transitions, 369 flow. Second operand 5 states and 732 transitions. [2023-11-12 02:29:20,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 129 transitions, 1107 flow [2023-11-12 02:29:20,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 129 transitions, 1074 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:20,092 INFO L231 Difference]: Finished difference. Result has 81 places, 57 transitions, 415 flow [2023-11-12 02:29:20,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=415, PETRI_PLACES=81, PETRI_TRANSITIONS=57} [2023-11-12 02:29:20,093 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 26 predicate places. [2023-11-12 02:29:20,093 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 57 transitions, 415 flow [2023-11-12 02:29:20,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 137.16666666666666) internal successors, (823), 6 states have internal predecessors, (823), 0 states have call successors, (0), 0 states 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 02:29:20,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:20,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:20,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:20,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-12 02:29:20,300 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:29:20,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:20,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1196161403, now seen corresponding path program 1 times [2023-11-12 02:29:20,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:20,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119784069] [2023-11-12 02:29:20,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:20,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:20,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:21,077 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 02:29:21,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:21,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119784069] [2023-11-12 02:29:21,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119784069] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:29:21,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614953614] [2023-11-12 02:29:21,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:21,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:21,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:21,081 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:21,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56004e7b-49e3-4e81-a3d7-ad2af7f136a8/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process