./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 0e0057cc 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_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI --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 0.2.4-dev-0e0057c [2023-11-24 21:55:27,532 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:55:27,601 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:55:27,607 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:55:27,608 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:55:27,633 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:55:27,634 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:55:27,635 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:55:27,636 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:55:27,636 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:55:27,637 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:55:27,638 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:55:27,639 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:55:27,639 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:55:27,640 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:55:27,641 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:55:27,641 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:55:27,642 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:55:27,643 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:55:27,643 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:55:27,644 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:55:27,645 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:55:27,645 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:55:27,646 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:55:27,646 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:55:27,646 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:55:27,647 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:55:27,647 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:55:27,648 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:55:27,648 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:55:27,649 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:55:27,649 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:55:27,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:55:27,651 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:55:27,651 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:55:27,652 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:55:27,652 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:55:27,653 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:55:27,653 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:55:27,653 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:55:27,654 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:55:27,655 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_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f93f8af6c620ba8dc44e82cf4c30bbca874545f3e3802e43ba4e1345a3afed4 [2023-11-24 21:55:27,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:55:27,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:55:27,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:55:27,916 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:55:27,917 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:55:27,918 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2023-11-24 21:55:31,150 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:55:31,488 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:55:31,489 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2023-11-24 21:55:31,501 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/data/a310e11d5/1d7811a4ce8e443d87480eadb9cf9aaf/FLAGbfc15c9b5 [2023-11-24 21:55:31,521 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/data/a310e11d5/1d7811a4ce8e443d87480eadb9cf9aaf [2023-11-24 21:55:31,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:55:31,530 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:55:31,531 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:55:31,532 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:55:31,538 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:55:31,541 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:55:31" (1/1) ... [2023-11-24 21:55:31,542 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58b2eefe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:31, skipping insertion in model container [2023-11-24 21:55:31,542 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:55:31" (1/1) ... [2023-11-24 21:55:31,574 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:55:31,843 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:55:31,860 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:55:31,885 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:55:31,900 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:55:31,900 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:31 WrapperNode [2023-11-24 21:55:31,901 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:55:31,902 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:55:31,902 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:55:31,902 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:55:31,910 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:31" (1/1) ... [2023-11-24 21:55:31,930 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:31" (1/1) ... [2023-11-24 21:55:31,952 INFO L138 Inliner]: procedures = 20, calls = 33, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 97 [2023-11-24 21:55:31,953 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:55:31,953 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:55:31,954 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:55:31,954 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:55:31,967 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:31" (1/1) ... [2023-11-24 21:55:31,967 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:31" (1/1) ... [2023-11-24 21:55:31,970 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:31" (1/1) ... [2023-11-24 21:55:31,998 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-24 21:55:31,998 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:31" (1/1) ... [2023-11-24 21:55:31,998 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:31" (1/1) ... [2023-11-24 21:55:32,007 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:31" (1/1) ... [2023-11-24 21:55:32,011 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:31" (1/1) ... [2023-11-24 21:55:32,013 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:31" (1/1) ... [2023-11-24 21:55:32,015 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:31" (1/1) ... [2023-11-24 21:55:32,018 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:55:32,019 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:55:32,019 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:55:32,020 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:55:32,020 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:31" (1/1) ... [2023-11-24 21:55:32,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:55:32,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:55:32,066 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:55:32,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:55:32,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:55:32,097 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:55:32,097 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:55:32,097 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:55:32,097 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:55:32,097 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-24 21:55:32,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-24 21:55:32,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-24 21:55:32,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-24 21:55:32,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:55:32,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:55:32,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:55:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:55:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:55:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:55:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:55:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:55:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:55:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:55:32,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:55:32,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:55:32,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:55:32,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:55:32,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:55:32,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:55:32,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:55:32,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:55:32,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:55:32,105 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:55:32,237 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:55:32,240 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:55:32,604 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:55:32,954 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:55:32,954 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 21:55:32,961 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:55:32 BoogieIcfgContainer [2023-11-24 21:55:32,961 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:55:32,963 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:55:32,964 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:55:32,968 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:55:32,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:55:31" (1/3) ... [2023-11-24 21:55:32,969 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f49d568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:55:32, skipping insertion in model container [2023-11-24 21:55:32,969 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:31" (2/3) ... [2023-11-24 21:55:32,970 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f49d568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:55:32, skipping insertion in model container [2023-11-24 21:55:32,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:55:32" (3/3) ... [2023-11-24 21:55:32,971 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x6.wvr.c [2023-11-24 21:55:32,993 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:55:32,993 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-24 21:55:32,993 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:55:33,068 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-24 21:55:33,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 61 transitions, 150 flow [2023-11-24 21:55:33,153 INFO L124 PetriNetUnfolderBase]: 4/57 cut-off events. [2023-11-24 21:55:33,153 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-24 21:55:33,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 57 events. 4/57 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2023-11-24 21:55:33,158 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 61 transitions, 150 flow [2023-11-24 21:55:33,166 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 56 transitions, 136 flow [2023-11-24 21:55:33,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:55:33,196 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;@30cbef0d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:55:33,196 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-24 21:55:33,209 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:55:33,209 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:55:33,209 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:55:33,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:33,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:55:33,211 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:55:33,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:33,218 INFO L85 PathProgramCache]: Analyzing trace with hash 11434, now seen corresponding path program 1 times [2023-11-24 21:55:33,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:33,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306864265] [2023-11-24 21:55:33,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:33,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:33,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:33,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306864265] [2023-11-24 21:55:33,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306864265] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:33,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:33,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:55:33,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862188183] [2023-11-24 21:55:33,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:33,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:55:33,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:33,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:55:33,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:55:33,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 61 [2023-11-24 21:55:33,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:33,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:33,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 61 [2023-11-24 21:55:33,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:34,479 INFO L124 PetriNetUnfolderBase]: 1488/2142 cut-off events. [2023-11-24 21:55:34,480 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2023-11-24 21:55:34,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4093 conditions, 2142 events. 1488/2142 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 8751 event pairs, 691 based on Foata normal form. 1/1226 useless extension candidates. Maximal degree in co-relation 3527. Up to 1825 conditions per place. [2023-11-24 21:55:34,516 INFO L140 encePairwiseOnDemand]: 57/61 looper letters, 23 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-11-24 21:55:34,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 52 transitions, 176 flow [2023-11-24 21:55:34,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:34,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:34,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-11-24 21:55:34,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6885245901639344 [2023-11-24 21:55:34,537 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-11-24 21:55:34,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-11-24 21:55:34,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:34,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-11-24 21:55:34,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:34,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:34,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:34,558 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 136 flow. Second operand 3 states and 126 transitions. [2023-11-24 21:55:34,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 52 transitions, 176 flow [2023-11-24 21:55:34,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 160 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-24 21:55:34,575 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 114 flow [2023-11-24 21:55:34,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2023-11-24 21:55:34,584 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -10 predicate places. [2023-11-24 21:55:34,585 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 114 flow [2023-11-24 21:55:34,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:34,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:34,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:55:34,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:55:34,586 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:55:34,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:34,587 INFO L85 PathProgramCache]: Analyzing trace with hash 11435, now seen corresponding path program 1 times [2023-11-24 21:55:34,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:34,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923789256] [2023-11-24 21:55:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:34,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:34,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:34,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923789256] [2023-11-24 21:55:34,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923789256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:34,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:34,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:55:34,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075657176] [2023-11-24 21:55:34,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:34,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:55:34,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:34,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:55:34,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:55:34,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 61 [2023-11-24 21:55:34,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:34,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:34,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 61 [2023-11-24 21:55:34,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:35,198 INFO L124 PetriNetUnfolderBase]: 1056/1576 cut-off events. [2023-11-24 21:55:35,198 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-24 21:55:35,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2931 conditions, 1576 events. 1056/1576 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6350 event pairs, 475 based on Foata normal form. 82/979 useless extension candidates. Maximal degree in co-relation 2925. Up to 1311 conditions per place. [2023-11-24 21:55:35,216 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 21 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-11-24 21:55:35,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 50 transitions, 154 flow [2023-11-24 21:55:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:35,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:35,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-24 21:55:35,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7049180327868853 [2023-11-24 21:55:35,224 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-24 21:55:35,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-24 21:55:35,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:35,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-24 21:55:35,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:35,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:35,234 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:35,235 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 114 flow. Second operand 3 states and 129 transitions. [2023-11-24 21:55:35,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 50 transitions, 154 flow [2023-11-24 21:55:35,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 50 transitions, 153 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:35,239 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 111 flow [2023-11-24 21:55:35,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-11-24 21:55:35,247 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -11 predicate places. [2023-11-24 21:55:35,247 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 111 flow [2023-11-24 21:55:35,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:35,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:35,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:55:35,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:55:35,248 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:55:35,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:35,249 INFO L85 PathProgramCache]: Analyzing trace with hash 340981482, now seen corresponding path program 1 times [2023-11-24 21:55:35,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:35,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695734981] [2023-11-24 21:55:35,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:35,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:35,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:35,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695734981] [2023-11-24 21:55:35,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695734981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:35,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:35,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:55:35,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860567433] [2023-11-24 21:55:35,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:35,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:55:35,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:35,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:55:35,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:55:35,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 61 [2023-11-24 21:55:35,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:35,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:35,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 61 [2023-11-24 21:55:35,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:35,712 INFO L124 PetriNetUnfolderBase]: 1056/1556 cut-off events. [2023-11-24 21:55:35,712 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-24 21:55:35,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2912 conditions, 1556 events. 1056/1556 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6169 event pairs, 475 based on Foata normal form. 30/927 useless extension candidates. Maximal degree in co-relation 2905. Up to 1311 conditions per place. [2023-11-24 21:55:35,728 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 21 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-11-24 21:55:35,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 151 flow [2023-11-24 21:55:35,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:35,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-24 21:55:35,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7049180327868853 [2023-11-24 21:55:35,734 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-24 21:55:35,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-24 21:55:35,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:35,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-24 21:55:35,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:35,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:35,739 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:35,739 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 111 flow. Second operand 3 states and 129 transitions. [2023-11-24 21:55:35,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 151 flow [2023-11-24 21:55:35,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 48 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:35,742 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 108 flow [2023-11-24 21:55:35,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2023-11-24 21:55:35,746 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -12 predicate places. [2023-11-24 21:55:35,746 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 108 flow [2023-11-24 21:55:35,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:35,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:35,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:55:35,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:55:35,748 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:55:35,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:35,749 INFO L85 PathProgramCache]: Analyzing trace with hash 340981481, now seen corresponding path program 1 times [2023-11-24 21:55:35,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:35,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441254208] [2023-11-24 21:55:35,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:35,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:35,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:35,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441254208] [2023-11-24 21:55:35,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441254208] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:35,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:35,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:55:35,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206250416] [2023-11-24 21:55:35,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:35,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:55:35,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:35,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:55:35,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:55:35,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 61 [2023-11-24 21:55:35,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:35,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:35,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 61 [2023-11-24 21:55:35,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:36,108 INFO L124 PetriNetUnfolderBase]: 1164/1670 cut-off events. [2023-11-24 21:55:36,109 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-11-24 21:55:36,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3164 conditions, 1670 events. 1164/1670 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6413 event pairs, 530 based on Foata normal form. 0/972 useless extension candidates. Maximal degree in co-relation 3156. Up to 1448 conditions per place. [2023-11-24 21:55:36,125 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 23 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-24 21:55:36,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 46 transitions, 152 flow [2023-11-24 21:55:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:36,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:36,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-24 21:55:36,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6830601092896175 [2023-11-24 21:55:36,127 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-24 21:55:36,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-24 21:55:36,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:36,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-24 21:55:36,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:36,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:36,130 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:36,131 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 108 flow. Second operand 3 states and 125 transitions. [2023-11-24 21:55:36,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 46 transitions, 152 flow [2023-11-24 21:55:36,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 46 transitions, 151 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:36,133 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 105 flow [2023-11-24 21:55:36,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2023-11-24 21:55:36,136 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -13 predicate places. [2023-11-24 21:55:36,136 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 105 flow [2023-11-24 21:55:36,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:36,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:36,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:36,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:55:36,138 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)] === [2023-11-24 21:55:36,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:36,139 INFO L85 PathProgramCache]: Analyzing trace with hash 581993697, now seen corresponding path program 1 times [2023-11-24 21:55:36,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:36,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876035551] [2023-11-24 21:55:36,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:36,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:36,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:36,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876035551] [2023-11-24 21:55:36,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876035551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:36,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:36,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:55:36,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131382642] [2023-11-24 21:55:36,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:36,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:55:36,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:36,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:55:36,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:55:36,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 61 [2023-11-24 21:55:36,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:36,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:36,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 61 [2023-11-24 21:55:36,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:36,560 INFO L124 PetriNetUnfolderBase]: 1056/1524 cut-off events. [2023-11-24 21:55:36,560 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-24 21:55:36,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2882 conditions, 1524 events. 1056/1524 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5877 event pairs, 475 based on Foata normal form. 18/915 useless extension candidates. Maximal degree in co-relation 2873. Up to 1311 conditions per place. [2023-11-24 21:55:36,575 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 21 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-11-24 21:55:36,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 44 transitions, 145 flow [2023-11-24 21:55:36,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:36,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-24 21:55:36,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7049180327868853 [2023-11-24 21:55:36,577 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-24 21:55:36,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-24 21:55:36,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:36,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-24 21:55:36,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:36,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:36,580 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:36,580 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 105 flow. Second operand 3 states and 129 transitions. [2023-11-24 21:55:36,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 44 transitions, 145 flow [2023-11-24 21:55:36,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 44 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:36,583 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 102 flow [2023-11-24 21:55:36,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-11-24 21:55:36,584 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -14 predicate places. [2023-11-24 21:55:36,584 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 102 flow [2023-11-24 21:55:36,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:36,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:36,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:36,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:55:36,585 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:55:36,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:36,586 INFO L85 PathProgramCache]: Analyzing trace with hash 581993696, now seen corresponding path program 1 times [2023-11-24 21:55:36,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:36,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276818558] [2023-11-24 21:55:36,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:36,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:36,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:36,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276818558] [2023-11-24 21:55:36,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276818558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:36,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:36,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:55:36,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080595114] [2023-11-24 21:55:36,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:36,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:55:36,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:36,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:55:36,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:55:36,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 61 [2023-11-24 21:55:36,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:36,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:36,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 61 [2023-11-24 21:55:36,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:36,863 INFO L124 PetriNetUnfolderBase]: 1088/1554 cut-off events. [2023-11-24 21:55:36,864 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-11-24 21:55:36,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2960 conditions, 1554 events. 1088/1554 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5926 event pairs, 494 based on Foata normal form. 0/922 useless extension candidates. Maximal degree in co-relation 2950. Up to 1358 conditions per place. [2023-11-24 21:55:36,878 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 23 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-11-24 21:55:36,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 146 flow [2023-11-24 21:55:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:36,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:36,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-24 21:55:36,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6830601092896175 [2023-11-24 21:55:36,880 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-24 21:55:36,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-24 21:55:36,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:36,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-24 21:55:36,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:36,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:36,882 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:36,882 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 102 flow. Second operand 3 states and 125 transitions. [2023-11-24 21:55:36,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 146 flow [2023-11-24 21:55:36,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 42 transitions, 145 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:36,884 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 99 flow [2023-11-24 21:55:36,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-11-24 21:55:36,885 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -15 predicate places. [2023-11-24 21:55:36,886 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 99 flow [2023-11-24 21:55:36,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:36,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:36,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:36,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:55:36,887 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)] === [2023-11-24 21:55:36,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:36,887 INFO L85 PathProgramCache]: Analyzing trace with hash -608422970, now seen corresponding path program 1 times [2023-11-24 21:55:36,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:36,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332618670] [2023-11-24 21:55:36,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:36,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:36,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:36,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332618670] [2023-11-24 21:55:36,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332618670] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:36,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:36,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:55:36,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273259985] [2023-11-24 21:55:36,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:36,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:55:36,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:36,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:55:36,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:55:36,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 61 [2023-11-24 21:55:36,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:36,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:36,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 61 [2023-11-24 21:55:36,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:37,189 INFO L124 PetriNetUnfolderBase]: 1108/1554 cut-off events. [2023-11-24 21:55:37,190 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-24 21:55:37,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2987 conditions, 1554 events. 1108/1554 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5821 event pairs, 510 based on Foata normal form. 0/953 useless extension candidates. Maximal degree in co-relation 2976. Up to 1384 conditions per place. [2023-11-24 21:55:37,204 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 23 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-11-24 21:55:37,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 40 transitions, 143 flow [2023-11-24 21:55:37,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:37,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-24 21:55:37,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6830601092896175 [2023-11-24 21:55:37,207 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-24 21:55:37,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-24 21:55:37,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:37,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-24 21:55:37,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:37,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:37,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:37,210 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 99 flow. Second operand 3 states and 125 transitions. [2023-11-24 21:55:37,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 40 transitions, 143 flow [2023-11-24 21:55:37,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 40 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:37,212 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 96 flow [2023-11-24 21:55:37,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2023-11-24 21:55:37,213 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -16 predicate places. [2023-11-24 21:55:37,214 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 96 flow [2023-11-24 21:55:37,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:37,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:37,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:37,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:55:37,214 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:55:37,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:37,215 INFO L85 PathProgramCache]: Analyzing trace with hash -608422969, now seen corresponding path program 1 times [2023-11-24 21:55:37,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:37,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145832537] [2023-11-24 21:55:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:37,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:37,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:37,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145832537] [2023-11-24 21:55:37,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145832537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:37,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:37,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:55:37,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053142801] [2023-11-24 21:55:37,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:37,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:55:37,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:37,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:55:37,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:55:37,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 61 [2023-11-24 21:55:37,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:37,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:37,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 61 [2023-11-24 21:55:37,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:37,539 INFO L124 PetriNetUnfolderBase]: 1056/1472 cut-off events. [2023-11-24 21:55:37,539 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-24 21:55:37,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2833 conditions, 1472 events. 1056/1472 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5336 event pairs, 475 based on Foata normal form. 30/927 useless extension candidates. Maximal degree in co-relation 2821. Up to 1311 conditions per place. [2023-11-24 21:55:37,552 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 21 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-11-24 21:55:37,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 38 transitions, 136 flow [2023-11-24 21:55:37,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:37,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:37,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-24 21:55:37,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7049180327868853 [2023-11-24 21:55:37,554 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-24 21:55:37,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-24 21:55:37,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:37,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-24 21:55:37,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:37,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:37,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:37,556 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 96 flow. Second operand 3 states and 129 transitions. [2023-11-24 21:55:37,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 38 transitions, 136 flow [2023-11-24 21:55:37,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:37,557 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 93 flow [2023-11-24 21:55:37,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2023-11-24 21:55:37,558 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -17 predicate places. [2023-11-24 21:55:37,559 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 93 flow [2023-11-24 21:55:37,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:37,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:37,559 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:37,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:55:37,560 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:55:37,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:37,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1417066188, now seen corresponding path program 1 times [2023-11-24 21:55:37,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:37,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047530448] [2023-11-24 21:55:37,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:37,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:37,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:37,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047530448] [2023-11-24 21:55:37,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047530448] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:37,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:37,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:55:37,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458492229] [2023-11-24 21:55:37,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:37,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:55:37,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:37,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:55:37,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:55:37,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-24 21:55:37,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:37,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:37,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-24 21:55:37,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:37,984 INFO L124 PetriNetUnfolderBase]: 1367/1869 cut-off events. [2023-11-24 21:55:37,984 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-24 21:55:37,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3647 conditions, 1869 events. 1367/1869 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6588 event pairs, 131 based on Foata normal form. 1/1136 useless extension candidates. Maximal degree in co-relation 3634. Up to 1541 conditions per place. [2023-11-24 21:55:38,019 INFO L140 encePairwiseOnDemand]: 55/61 looper letters, 35 selfloop transitions, 5 changer transitions 1/57 dead transitions. [2023-11-24 21:55:38,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 57 transitions, 220 flow [2023-11-24 21:55:38,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:38,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:38,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2023-11-24 21:55:38,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8360655737704918 [2023-11-24 21:55:38,021 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 153 transitions. [2023-11-24 21:55:38,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 153 transitions. [2023-11-24 21:55:38,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:38,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 153 transitions. [2023-11-24 21:55:38,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:38,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:38,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:38,024 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 93 flow. Second operand 3 states and 153 transitions. [2023-11-24 21:55:38,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 57 transitions, 220 flow [2023-11-24 21:55:38,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 57 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:38,026 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 125 flow [2023-11-24 21:55:38,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-11-24 21:55:38,027 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -15 predicate places. [2023-11-24 21:55:38,027 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 125 flow [2023-11-24 21:55:38,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:38,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:38,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:38,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:55:38,028 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)] === [2023-11-24 21:55:38,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:38,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1052824306, now seen corresponding path program 1 times [2023-11-24 21:55:38,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:38,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926063572] [2023-11-24 21:55:38,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:38,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:38,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:38,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926063572] [2023-11-24 21:55:38,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926063572] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:38,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:38,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:55:38,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137101246] [2023-11-24 21:55:38,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:38,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:55:38,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:38,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:55:38,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:55:38,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-24 21:55:38,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:38,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:38,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-24 21:55:38,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:38,587 INFO L124 PetriNetUnfolderBase]: 1593/2178 cut-off events. [2023-11-24 21:55:38,587 INFO L125 PetriNetUnfolderBase]: For 506/506 co-relation queries the response was YES. [2023-11-24 21:55:38,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5220 conditions, 2178 events. 1593/2178 cut-off events. For 506/506 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 8078 event pairs, 113 based on Foata normal form. 34/2205 useless extension candidates. Maximal degree in co-relation 5205. Up to 842 conditions per place. [2023-11-24 21:55:38,606 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 66 selfloop transitions, 10 changer transitions 0/92 dead transitions. [2023-11-24 21:55:38,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 92 transitions, 421 flow [2023-11-24 21:55:38,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:55:38,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:55:38,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 255 transitions. [2023-11-24 21:55:38,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8360655737704918 [2023-11-24 21:55:38,609 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 255 transitions. [2023-11-24 21:55:38,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 255 transitions. [2023-11-24 21:55:38,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:38,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 255 transitions. [2023-11-24 21:55:38,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:38,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:38,612 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:38,612 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 125 flow. Second operand 5 states and 255 transitions. [2023-11-24 21:55:38,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 92 transitions, 421 flow [2023-11-24 21:55:38,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 92 transitions, 413 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:38,622 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 185 flow [2023-11-24 21:55:38,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2023-11-24 21:55:38,624 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -10 predicate places. [2023-11-24 21:55:38,624 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 185 flow [2023-11-24 21:55:38,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:38,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:38,625 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:38,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:55:38,625 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)] === [2023-11-24 21:55:38,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:38,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1140423435, now seen corresponding path program 1 times [2023-11-24 21:55:38,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:38,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596740980] [2023-11-24 21:55:38,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:38,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:38,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:38,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596740980] [2023-11-24 21:55:38,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596740980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:38,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:38,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:55:38,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273905501] [2023-11-24 21:55:38,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:38,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:55:38,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:38,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:55:38,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:55:38,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-24 21:55:38,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:38,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:38,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-24 21:55:38,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:39,250 INFO L124 PetriNetUnfolderBase]: 1547/2150 cut-off events. [2023-11-24 21:55:39,250 INFO L125 PetriNetUnfolderBase]: For 1808/1817 co-relation queries the response was YES. [2023-11-24 21:55:39,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6194 conditions, 2150 events. 1547/2150 cut-off events. For 1808/1817 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8209 event pairs, 95 based on Foata normal form. 55/2198 useless extension candidates. Maximal degree in co-relation 6176. Up to 812 conditions per place. [2023-11-24 21:55:39,276 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 65 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2023-11-24 21:55:39,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 89 transitions, 442 flow [2023-11-24 21:55:39,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:55:39,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:55:39,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 253 transitions. [2023-11-24 21:55:39,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8295081967213115 [2023-11-24 21:55:39,283 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 253 transitions. [2023-11-24 21:55:39,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 253 transitions. [2023-11-24 21:55:39,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:39,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 253 transitions. [2023-11-24 21:55:39,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 50.6) internal successors, (253), 5 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:39,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:39,286 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:39,286 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 185 flow. Second operand 5 states and 253 transitions. [2023-11-24 21:55:39,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 89 transitions, 442 flow [2023-11-24 21:55:39,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 89 transitions, 442 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:55:39,293 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 199 flow [2023-11-24 21:55:39,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2023-11-24 21:55:39,294 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -5 predicate places. [2023-11-24 21:55:39,294 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 199 flow [2023-11-24 21:55:39,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:39,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:39,295 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:39,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:55:39,295 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)] === [2023-11-24 21:55:39,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:39,295 INFO L85 PathProgramCache]: Analyzing trace with hash -148571532, now seen corresponding path program 2 times [2023-11-24 21:55:39,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:39,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155349484] [2023-11-24 21:55:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:39,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:39,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:39,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155349484] [2023-11-24 21:55:39,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155349484] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:55:39,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711072012] [2023-11-24 21:55:39,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:55:39,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:55:39,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:55:39,469 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:55:39,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:55:39,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:55:39,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:55:39,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:55:39,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:55:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:39,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:55:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:40,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711072012] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:55:40,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:55:40,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-24 21:55:40,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862440722] [2023-11-24 21:55:40,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:55:40,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:55:40,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:40,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:55:40,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:55:40,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-24 21:55:40,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 199 flow. Second operand has 6 states, 6 states have (on average 42.666666666666664) internal successors, (256), 6 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:40,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:40,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-24 21:55:40,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:40,479 INFO L124 PetriNetUnfolderBase]: 1472/2134 cut-off events. [2023-11-24 21:55:40,479 INFO L125 PetriNetUnfolderBase]: For 2656/2656 co-relation queries the response was YES. [2023-11-24 21:55:40,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6389 conditions, 2134 events. 1472/2134 cut-off events. For 2656/2656 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8980 event pairs, 354 based on Foata normal form. 61/2174 useless extension candidates. Maximal degree in co-relation 6368. Up to 1023 conditions per place. [2023-11-24 21:55:40,500 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 65 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2023-11-24 21:55:40,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 89 transitions, 474 flow [2023-11-24 21:55:40,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:55:40,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:55:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 254 transitions. [2023-11-24 21:55:40,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8327868852459016 [2023-11-24 21:55:40,503 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 254 transitions. [2023-11-24 21:55:40,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 254 transitions. [2023-11-24 21:55:40,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:40,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 254 transitions. [2023-11-24 21:55:40,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 50.8) internal successors, (254), 5 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:40,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:40,505 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:40,506 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 199 flow. Second operand 5 states and 254 transitions. [2023-11-24 21:55:40,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 89 transitions, 474 flow [2023-11-24 21:55:40,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 89 transitions, 467 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:40,514 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 242 flow [2023-11-24 21:55:40,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=242, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2023-11-24 21:55:40,515 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2023-11-24 21:55:40,515 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 242 flow [2023-11-24 21:55:40,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 42.666666666666664) internal successors, (256), 6 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:40,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:40,516 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:40,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:55:40,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:55:40,725 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)] === [2023-11-24 21:55:40,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:40,726 INFO L85 PathProgramCache]: Analyzing trace with hash -406650066, now seen corresponding path program 1 times [2023-11-24 21:55:40,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:40,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059267966] [2023-11-24 21:55:40,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:40,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:40,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:40,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:40,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059267966] [2023-11-24 21:55:40,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059267966] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:40,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:40,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:55:40,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379334121] [2023-11-24 21:55:40,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:40,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:55:40,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:40,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:55:40,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:55:40,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-24 21:55:40,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 242 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:40,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:40,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-24 21:55:40,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:41,285 INFO L124 PetriNetUnfolderBase]: 1783/2574 cut-off events. [2023-11-24 21:55:41,286 INFO L125 PetriNetUnfolderBase]: For 6416/6428 co-relation queries the response was YES. [2023-11-24 21:55:41,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8922 conditions, 2574 events. 1783/2574 cut-off events. For 6416/6428 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 11591 event pairs, 285 based on Foata normal form. 71/2635 useless extension candidates. Maximal degree in co-relation 8898. Up to 1013 conditions per place. [2023-11-24 21:55:41,308 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 91 selfloop transitions, 8 changer transitions 0/115 dead transitions. [2023-11-24 21:55:41,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 115 transitions, 833 flow [2023-11-24 21:55:41,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:55:41,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:55:41,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 248 transitions. [2023-11-24 21:55:41,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8131147540983606 [2023-11-24 21:55:41,310 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 248 transitions. [2023-11-24 21:55:41,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 248 transitions. [2023-11-24 21:55:41,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:41,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 248 transitions. [2023-11-24 21:55:41,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 49.6) internal successors, (248), 5 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:41,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:41,313 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:41,314 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 242 flow. Second operand 5 states and 248 transitions. [2023-11-24 21:55:41,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 115 transitions, 833 flow [2023-11-24 21:55:41,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 115 transitions, 808 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:41,323 INFO L231 Difference]: Finished difference. Result has 71 places, 56 transitions, 288 flow [2023-11-24 21:55:41,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=71, PETRI_TRANSITIONS=56} [2023-11-24 21:55:41,324 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 6 predicate places. [2023-11-24 21:55:41,324 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 56 transitions, 288 flow [2023-11-24 21:55:41,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:41,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:41,325 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:41,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:55:41,326 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)] === [2023-11-24 21:55:41,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:41,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1061739043, now seen corresponding path program 1 times [2023-11-24 21:55:41,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:41,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499983267] [2023-11-24 21:55:41,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:41,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:41,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:41,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499983267] [2023-11-24 21:55:41,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499983267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:41,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:41,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:55:41,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836998594] [2023-11-24 21:55:41,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:41,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:55:41,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:41,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:55:41,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:55:41,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-24 21:55:41,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 56 transitions, 288 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:41,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:41,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-24 21:55:41,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:41,897 INFO L124 PetriNetUnfolderBase]: 1750/2431 cut-off events. [2023-11-24 21:55:41,897 INFO L125 PetriNetUnfolderBase]: For 6905/6923 co-relation queries the response was YES. [2023-11-24 21:55:41,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9980 conditions, 2431 events. 1750/2431 cut-off events. For 6905/6923 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 9971 event pairs, 71 based on Foata normal form. 40/2457 useless extension candidates. Maximal degree in co-relation 9952. Up to 983 conditions per place. [2023-11-24 21:55:41,921 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 93 selfloop transitions, 10 changer transitions 0/119 dead transitions. [2023-11-24 21:55:41,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 119 transitions, 890 flow [2023-11-24 21:55:41,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:55:41,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:55:41,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 246 transitions. [2023-11-24 21:55:41,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8065573770491803 [2023-11-24 21:55:41,924 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 246 transitions. [2023-11-24 21:55:41,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 246 transitions. [2023-11-24 21:55:41,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:41,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 246 transitions. [2023-11-24 21:55:41,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 49.2) internal successors, (246), 5 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:41,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:41,928 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:41,928 INFO L175 Difference]: Start difference. First operand has 71 places, 56 transitions, 288 flow. Second operand 5 states and 246 transitions. [2023-11-24 21:55:41,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 119 transitions, 890 flow [2023-11-24 21:55:41,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 119 transitions, 890 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:55:41,946 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 351 flow [2023-11-24 21:55:41,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=76, PETRI_TRANSITIONS=61} [2023-11-24 21:55:41,948 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 11 predicate places. [2023-11-24 21:55:41,948 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 351 flow [2023-11-24 21:55:41,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:41,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:41,949 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:41,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:55:41,949 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)] === [2023-11-24 21:55:41,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:41,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2000751540, now seen corresponding path program 2 times [2023-11-24 21:55:41,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:41,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912783636] [2023-11-24 21:55:41,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:41,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:42,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:42,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912783636] [2023-11-24 21:55:42,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912783636] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:42,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:42,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:55:42,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732689600] [2023-11-24 21:55:42,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:42,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:55:42,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:42,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:55:42,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:55:42,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-24 21:55:42,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 61 transitions, 351 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:42,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:42,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-24 21:55:42,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:42,532 INFO L124 PetriNetUnfolderBase]: 1577/2196 cut-off events. [2023-11-24 21:55:42,532 INFO L125 PetriNetUnfolderBase]: For 7018/7026 co-relation queries the response was YES. [2023-11-24 21:55:42,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9567 conditions, 2196 events. 1577/2196 cut-off events. For 7018/7026 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8754 event pairs, 93 based on Foata normal form. 32/2212 useless extension candidates. Maximal degree in co-relation 9536. Up to 864 conditions per place. [2023-11-24 21:55:42,558 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 88 selfloop transitions, 9 changer transitions 4/117 dead transitions. [2023-11-24 21:55:42,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 117 transitions, 899 flow [2023-11-24 21:55:42,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:55:42,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:55:42,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 246 transitions. [2023-11-24 21:55:42,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8065573770491803 [2023-11-24 21:55:42,561 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 246 transitions. [2023-11-24 21:55:42,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 246 transitions. [2023-11-24 21:55:42,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:42,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 246 transitions. [2023-11-24 21:55:42,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 49.2) internal successors, (246), 5 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:42,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:42,565 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:42,565 INFO L175 Difference]: Start difference. First operand has 76 places, 61 transitions, 351 flow. Second operand 5 states and 246 transitions. [2023-11-24 21:55:42,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 117 transitions, 899 flow [2023-11-24 21:55:42,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 117 transitions, 886 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:42,582 INFO L231 Difference]: Finished difference. Result has 80 places, 60 transitions, 351 flow [2023-11-24 21:55:42,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=80, PETRI_TRANSITIONS=60} [2023-11-24 21:55:42,584 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 15 predicate places. [2023-11-24 21:55:42,585 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 60 transitions, 351 flow [2023-11-24 21:55:42,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:42,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:42,585 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:42,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:55:42,586 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)] === [2023-11-24 21:55:42,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:42,588 INFO L85 PathProgramCache]: Analyzing trace with hash -221744387, now seen corresponding path program 2 times [2023-11-24 21:55:42,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:42,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459195749] [2023-11-24 21:55:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:42,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:42,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:42,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459195749] [2023-11-24 21:55:42,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459195749] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:55:42,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644329462] [2023-11-24 21:55:42,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:55:42,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:55:42,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:55:42,773 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:55:42,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:55:42,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:55:42,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:55:42,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:55:42,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:55:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:43,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:55:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:43,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644329462] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:55:43,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:55:43,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-24 21:55:43,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909635825] [2023-11-24 21:55:43,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:55:43,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:55:43,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:43,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:55:43,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:55:43,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-24 21:55:43,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 60 transitions, 351 flow. Second operand has 6 states, 6 states have (on average 42.833333333333336) internal successors, (257), 6 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:43,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:43,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-24 21:55:43,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:43,798 INFO L124 PetriNetUnfolderBase]: 1515/2232 cut-off events. [2023-11-24 21:55:43,799 INFO L125 PetriNetUnfolderBase]: For 7282/7292 co-relation queries the response was YES. [2023-11-24 21:55:43,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9706 conditions, 2232 events. 1515/2232 cut-off events. For 7282/7292 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10050 event pairs, 268 based on Foata normal form. 63/2285 useless extension candidates. Maximal degree in co-relation 9673. Up to 1124 conditions per place. [2023-11-24 21:55:43,820 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 91 selfloop transitions, 8 changer transitions 0/115 dead transitions. [2023-11-24 21:55:43,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 115 transitions, 911 flow [2023-11-24 21:55:43,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:55:43,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:55:43,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 243 transitions. [2023-11-24 21:55:43,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7967213114754098 [2023-11-24 21:55:43,823 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 243 transitions. [2023-11-24 21:55:43,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 243 transitions. [2023-11-24 21:55:43,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:43,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 243 transitions. [2023-11-24 21:55:43,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:43,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:43,828 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:43,829 INFO L175 Difference]: Start difference. First operand has 80 places, 60 transitions, 351 flow. Second operand 5 states and 243 transitions. [2023-11-24 21:55:43,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 115 transitions, 911 flow [2023-11-24 21:55:43,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 115 transitions, 902 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:43,846 INFO L231 Difference]: Finished difference. Result has 85 places, 63 transitions, 392 flow [2023-11-24 21:55:43,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=392, PETRI_PLACES=85, PETRI_TRANSITIONS=63} [2023-11-24 21:55:43,847 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 20 predicate places. [2023-11-24 21:55:43,847 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 63 transitions, 392 flow [2023-11-24 21:55:43,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 42.833333333333336) internal successors, (257), 6 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:43,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:43,848 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:43,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-24 21:55:44,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-24 21:55:44,054 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)] === [2023-11-24 21:55:44,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:44,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1746552691, now seen corresponding path program 2 times [2023-11-24 21:55:44,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:44,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557756174] [2023-11-24 21:55:44,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:44,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:44,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:44,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557756174] [2023-11-24 21:55:44,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557756174] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:55:44,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622813867] [2023-11-24 21:55:44,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:55:44,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:55:44,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:55:44,173 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:55:44,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:55:44,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:55:44,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:55:44,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:55:44,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:55:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:44,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:55:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:44,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622813867] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:55:44,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:55:44,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-24 21:55:44,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456176717] [2023-11-24 21:55:44,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:55:44,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:55:44,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:44,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:55:44,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:55:44,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-24 21:55:44,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 63 transitions, 392 flow. Second operand has 6 states, 6 states have (on average 41.833333333333336) internal successors, (251), 6 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:44,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:44,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-24 21:55:44,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:44,975 INFO L124 PetriNetUnfolderBase]: 1447/2154 cut-off events. [2023-11-24 21:55:44,976 INFO L125 PetriNetUnfolderBase]: For 6893/6909 co-relation queries the response was YES. [2023-11-24 21:55:44,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9942 conditions, 2154 events. 1447/2154 cut-off events. For 6893/6909 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9821 event pairs, 375 based on Foata normal form. 72/2213 useless extension candidates. Maximal degree in co-relation 9906. Up to 1150 conditions per place. [2023-11-24 21:55:45,001 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 111 selfloop transitions, 8 changer transitions 0/135 dead transitions. [2023-11-24 21:55:45,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 135 transitions, 1122 flow [2023-11-24 21:55:45,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:55:45,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:55:45,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 251 transitions. [2023-11-24 21:55:45,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8229508196721311 [2023-11-24 21:55:45,005 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 251 transitions. [2023-11-24 21:55:45,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 251 transitions. [2023-11-24 21:55:45,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:45,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 251 transitions. [2023-11-24 21:55:45,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 50.2) internal successors, (251), 5 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:45,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:45,008 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:45,008 INFO L175 Difference]: Start difference. First operand has 85 places, 63 transitions, 392 flow. Second operand 5 states and 251 transitions. [2023-11-24 21:55:45,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 135 transitions, 1122 flow [2023-11-24 21:55:45,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 135 transitions, 1064 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-11-24 21:55:45,024 INFO L231 Difference]: Finished difference. Result has 89 places, 66 transitions, 429 flow [2023-11-24 21:55:45,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=429, PETRI_PLACES=89, PETRI_TRANSITIONS=66} [2023-11-24 21:55:45,026 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 24 predicate places. [2023-11-24 21:55:45,026 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 66 transitions, 429 flow [2023-11-24 21:55:45,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.833333333333336) internal successors, (251), 6 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:45,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:45,027 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:45,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-24 21:55:45,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-24 21:55:45,233 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)] === [2023-11-24 21:55:45,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:45,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1495651785, now seen corresponding path program 1 times [2023-11-24 21:55:45,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:45,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795268039] [2023-11-24 21:55:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:45,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:48,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:48,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795268039] [2023-11-24 21:55:48,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795268039] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:55:48,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244650497] [2023-11-24 21:55:48,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:48,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:55:48,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:55:48,385 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:55:48,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d291b8e7-efb0-4a92-b11b-fe0238dc1b26/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process