./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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1f93f8af6c620ba8dc44e82cf4c30bbca874545f3e3802e43ba4e1345a3afed4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:20:48,887 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:20:48,956 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-28 20:20:48,960 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:20:48,961 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:20:48,985 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:20:48,986 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:20:48,987 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:20:48,987 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:20:48,988 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:20:48,989 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:20:48,989 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:20:48,990 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:20:48,990 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:20:48,991 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:20:48,992 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:20:48,992 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:20:48,993 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:20:48,993 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:20:48,994 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:20:48,994 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-28 20:20:48,995 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-28 20:20:48,995 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-28 20:20:48,996 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:20:48,996 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-28 20:20:48,997 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-28 20:20:48,997 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:20:48,998 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:20:48,998 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:20:48,999 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:20:48,999 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:20:48,999 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:20:49,000 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:20:49,000 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:20:49,000 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:20:49,000 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:20:49,001 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:20:49,001 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:20:49,001 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:20:49,001 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:20:49,002 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:20:49,002 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_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f93f8af6c620ba8dc44e82cf4c30bbca874545f3e3802e43ba4e1345a3afed4 [2023-11-28 20:20:49,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:20:49,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:20:49,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:20:49,245 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:20:49,245 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:20:49,246 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2023-11-28 20:20:51,988 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:20:52,189 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:20:52,190 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2023-11-28 20:20:52,197 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/data/cbbcfdd25/a4afe74b234a4dbdab1068c6122f5837/FLAGc6e44c183 [2023-11-28 20:20:52,566 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/data/cbbcfdd25/a4afe74b234a4dbdab1068c6122f5837 [2023-11-28 20:20:52,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:20:52,570 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:20:52,571 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:20:52,571 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:20:52,577 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:20:52,577 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:20:52" (1/1) ... [2023-11-28 20:20:52,578 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12849f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:52, skipping insertion in model container [2023-11-28 20:20:52,579 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:20:52" (1/1) ... [2023-11-28 20:20:52,604 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:20:52,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:20:52,786 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:20:52,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:20:52,827 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:20:52,827 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:52 WrapperNode [2023-11-28 20:20:52,828 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:20:52,829 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:20:52,829 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:20:52,829 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:20:52,837 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:52" (1/1) ... [2023-11-28 20:20:52,846 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:52" (1/1) ... [2023-11-28 20:20:52,869 INFO L138 Inliner]: procedures = 20, calls = 33, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 97 [2023-11-28 20:20:52,869 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:20:52,870 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:20:52,870 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:20:52,871 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:20:52,880 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:52" (1/1) ... [2023-11-28 20:20:52,880 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:52" (1/1) ... [2023-11-28 20:20:52,883 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:52" (1/1) ... [2023-11-28 20:20:52,899 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]. [2023-11-28 20:20:52,899 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:52" (1/1) ... [2023-11-28 20:20:52,899 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:52" (1/1) ... [2023-11-28 20:20:52,905 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:52" (1/1) ... [2023-11-28 20:20:52,908 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:52" (1/1) ... [2023-11-28 20:20:52,910 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:52" (1/1) ... [2023-11-28 20:20:52,911 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:52" (1/1) ... [2023-11-28 20:20:52,914 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:20:52,915 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:20:52,915 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:20:52,915 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:20:52,916 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:52" (1/1) ... [2023-11-28 20:20:52,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:20:52,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:20:52,950 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:20:52,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:20:52,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:20:52,978 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-28 20:20:52,978 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-28 20:20:52,978 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-28 20:20:52,978 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-28 20:20:52,978 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-28 20:20:52,979 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-28 20:20:52,979 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-28 20:20:52,979 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-28 20:20:52,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:20:52,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 20:20:52,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 20:20:52,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-28 20:20:52,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-28 20:20:52,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 20:20:52,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 20:20:52,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 20:20:52,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 20:20:52,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-28 20:20:52,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-28 20:20:52,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:20:52,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:20:52,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 20:20:52,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 20:20:52,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 20:20:52,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-28 20:20:52,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-28 20:20:52,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 20:20:52,984 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-28 20:20:53,089 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:20:53,090 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:20:53,374 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:20:53,533 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:20:53,534 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-28 20:20:53,534 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:20:53 BoogieIcfgContainer [2023-11-28 20:20:53,534 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:20:53,538 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:20:53,538 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:20:53,541 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:20:53,541 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:20:52" (1/3) ... [2023-11-28 20:20:53,542 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64810706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:20:53, skipping insertion in model container [2023-11-28 20:20:53,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:52" (2/3) ... [2023-11-28 20:20:53,542 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64810706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:20:53, skipping insertion in model container [2023-11-28 20:20:53,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:20:53" (3/3) ... [2023-11-28 20:20:53,544 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x6.wvr.c [2023-11-28 20:20:53,564 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:20:53,565 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-28 20:20:53,565 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-28 20:20:53,619 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-28 20:20:53,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 61 transitions, 150 flow [2023-11-28 20:20:53,692 INFO L124 PetriNetUnfolderBase]: 4/57 cut-off events. [2023-11-28 20:20:53,692 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-28 20:20:53,695 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. [2023-11-28 20:20:53,695 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 61 transitions, 150 flow [2023-11-28 20:20:53,700 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 56 transitions, 136 flow [2023-11-28 20:20:53,710 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:20:53,716 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;@160a149f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:20:53,716 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-28 20:20:53,720 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 20:20:53,720 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-28 20:20:53,720 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 20:20:53,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:20:53,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-28 20:20:53,732 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)] === [2023-11-28 20:20:53,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:53,739 INFO L85 PathProgramCache]: Analyzing trace with hash 11434, now seen corresponding path program 1 times [2023-11-28 20:20:53,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:53,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692380706] [2023-11-28 20:20:53,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:53,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:54,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:54,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692380706] [2023-11-28 20:20:54,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692380706] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:54,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:54,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 20:20:54,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080383142] [2023-11-28 20:20:54,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:54,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:20:54,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:54,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:20:54,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:20:54,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 61 [2023-11-28 20:20:54,242 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) [2023-11-28 20:20:54,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:20:54,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 61 [2023-11-28 20:20:54,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:20:54,548 INFO L124 PetriNetUnfolderBase]: 1488/2142 cut-off events. [2023-11-28 20:20:54,548 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2023-11-28 20:20:54,556 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. [2023-11-28 20:20:54,571 INFO L140 encePairwiseOnDemand]: 57/61 looper letters, 23 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-11-28 20:20:54,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 52 transitions, 176 flow [2023-11-28 20:20:54,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:20:54,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:20:54,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-11-28 20:20:54,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6885245901639344 [2023-11-28 20:20:54,582 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-11-28 20:20:54,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-11-28 20:20:54,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:20:54,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-11-28 20:20:54,587 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) [2023-11-28 20:20:54,591 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) [2023-11-28 20:20:54,591 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) [2023-11-28 20:20:54,593 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 136 flow. Second operand 3 states and 126 transitions. [2023-11-28 20:20:54,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 52 transitions, 176 flow [2023-11-28 20:20:54,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 160 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-28 20:20:54,602 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 114 flow [2023-11-28 20:20:54,604 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} [2023-11-28 20:20:54,608 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -10 predicate places. [2023-11-28 20:20:54,608 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 114 flow [2023-11-28 20:20:54,608 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) [2023-11-28 20:20:54,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:20:54,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-28 20:20:54,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:20:54,609 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)] === [2023-11-28 20:20:54,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:54,610 INFO L85 PathProgramCache]: Analyzing trace with hash 11435, now seen corresponding path program 1 times [2023-11-28 20:20:54,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:54,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760038075] [2023-11-28 20:20:54,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:54,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:54,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:54,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760038075] [2023-11-28 20:20:54,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760038075] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:54,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:54,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 20:20:54,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257511342] [2023-11-28 20:20:54,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:54,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:20:54,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:54,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:20:54,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:20:54,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 61 [2023-11-28 20:20:54,801 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) [2023-11-28 20:20:54,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:20:54,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 61 [2023-11-28 20:20:54,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:20:54,951 INFO L124 PetriNetUnfolderBase]: 1056/1576 cut-off events. [2023-11-28 20:20:54,951 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-28 20:20:54,954 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. [2023-11-28 20:20:54,962 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 21 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-11-28 20:20:54,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 50 transitions, 154 flow [2023-11-28 20:20:54,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:20:54,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:20:54,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-28 20:20:54,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7049180327868853 [2023-11-28 20:20:54,965 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-28 20:20:54,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-28 20:20:54,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:20:54,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-28 20:20:54,967 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) [2023-11-28 20:20:54,967 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) [2023-11-28 20:20:54,968 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) [2023-11-28 20:20:54,968 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 114 flow. Second operand 3 states and 129 transitions. [2023-11-28 20:20:54,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 50 transitions, 154 flow [2023-11-28 20:20:54,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 50 transitions, 153 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:20:54,970 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 111 flow [2023-11-28 20:20:54,971 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} [2023-11-28 20:20:54,972 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -11 predicate places. [2023-11-28 20:20:54,972 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 111 flow [2023-11-28 20:20:54,972 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) [2023-11-28 20:20:54,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:20:54,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 20:20:54,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 20:20:54,973 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)] === [2023-11-28 20:20:54,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:54,973 INFO L85 PathProgramCache]: Analyzing trace with hash 340981482, now seen corresponding path program 1 times [2023-11-28 20:20:54,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:54,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654770958] [2023-11-28 20:20:54,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:54,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:55,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:55,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654770958] [2023-11-28 20:20:55,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654770958] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:55,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:55,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 20:20:55,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284822029] [2023-11-28 20:20:55,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:55,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:20:55,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:55,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:20:55,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:20:55,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 61 [2023-11-28 20:20:55,118 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) [2023-11-28 20:20:55,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:20:55,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 61 [2023-11-28 20:20:55,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:20:55,251 INFO L124 PetriNetUnfolderBase]: 1056/1556 cut-off events. [2023-11-28 20:20:55,251 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-28 20:20:55,254 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. [2023-11-28 20:20:55,262 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 21 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-11-28 20:20:55,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 151 flow [2023-11-28 20:20:55,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:20:55,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:20:55,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-28 20:20:55,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7049180327868853 [2023-11-28 20:20:55,264 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-28 20:20:55,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-28 20:20:55,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:20:55,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-28 20:20:55,266 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) [2023-11-28 20:20:55,267 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) [2023-11-28 20:20:55,267 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) [2023-11-28 20:20:55,267 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 111 flow. Second operand 3 states and 129 transitions. [2023-11-28 20:20:55,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 151 flow [2023-11-28 20:20:55,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 48 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:20:55,269 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 108 flow [2023-11-28 20:20:55,270 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} [2023-11-28 20:20:55,270 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -12 predicate places. [2023-11-28 20:20:55,271 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 108 flow [2023-11-28 20:20:55,271 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) [2023-11-28 20:20:55,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:20:55,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 20:20:55,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 20:20:55,272 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)] === [2023-11-28 20:20:55,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:55,272 INFO L85 PathProgramCache]: Analyzing trace with hash 340981481, now seen corresponding path program 1 times [2023-11-28 20:20:55,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:55,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13325262] [2023-11-28 20:20:55,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:55,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:55,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:55,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13325262] [2023-11-28 20:20:55,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13325262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:55,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:55,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 20:20:55,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525311983] [2023-11-28 20:20:55,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:55,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:20:55,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:55,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:20:55,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:20:55,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 61 [2023-11-28 20:20:55,382 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) [2023-11-28 20:20:55,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:20:55,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 61 [2023-11-28 20:20:55,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:20:55,560 INFO L124 PetriNetUnfolderBase]: 1164/1670 cut-off events. [2023-11-28 20:20:55,560 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-11-28 20:20:55,564 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. [2023-11-28 20:20:55,576 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 23 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-28 20:20:55,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 46 transitions, 152 flow [2023-11-28 20:20:55,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:20:55,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:20:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-28 20:20:55,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6830601092896175 [2023-11-28 20:20:55,579 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-28 20:20:55,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-28 20:20:55,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:20:55,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-28 20:20:55,580 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) [2023-11-28 20:20:55,581 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) [2023-11-28 20:20:55,581 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) [2023-11-28 20:20:55,581 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 108 flow. Second operand 3 states and 125 transitions. [2023-11-28 20:20:55,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 46 transitions, 152 flow [2023-11-28 20:20:55,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 46 transitions, 151 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:20:55,583 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 105 flow [2023-11-28 20:20:55,583 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} [2023-11-28 20:20:55,584 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -13 predicate places. [2023-11-28 20:20:55,585 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 105 flow [2023-11-28 20:20:55,585 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) [2023-11-28 20:20:55,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:20:55,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:55,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-28 20:20:55,585 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)] === [2023-11-28 20:20:55,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:55,586 INFO L85 PathProgramCache]: Analyzing trace with hash 581993697, now seen corresponding path program 1 times [2023-11-28 20:20:55,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:55,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505170452] [2023-11-28 20:20:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:55,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:55,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:55,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505170452] [2023-11-28 20:20:55,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505170452] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:55,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:55,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 20:20:55,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580017896] [2023-11-28 20:20:55,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:55,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:20:55,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:55,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:20:55,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:20:55,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 61 [2023-11-28 20:20:55,729 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) [2023-11-28 20:20:55,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:20:55,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 61 [2023-11-28 20:20:55,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:20:55,912 INFO L124 PetriNetUnfolderBase]: 1056/1524 cut-off events. [2023-11-28 20:20:55,913 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-28 20:20:55,915 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. [2023-11-28 20:20:55,925 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 21 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-11-28 20:20:55,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 44 transitions, 145 flow [2023-11-28 20:20:55,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:20:55,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:20:55,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-28 20:20:55,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7049180327868853 [2023-11-28 20:20:55,927 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-28 20:20:55,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-28 20:20:55,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:20:55,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-28 20:20:55,927 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) [2023-11-28 20:20:55,928 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) [2023-11-28 20:20:55,929 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) [2023-11-28 20:20:55,929 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 105 flow. Second operand 3 states and 129 transitions. [2023-11-28 20:20:55,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 44 transitions, 145 flow [2023-11-28 20:20:55,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 44 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:20:55,930 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 102 flow [2023-11-28 20:20:55,931 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} [2023-11-28 20:20:55,931 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -14 predicate places. [2023-11-28 20:20:55,932 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 102 flow [2023-11-28 20:20:55,932 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) [2023-11-28 20:20:55,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:20:55,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:55,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 20:20:55,932 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)] === [2023-11-28 20:20:55,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:55,933 INFO L85 PathProgramCache]: Analyzing trace with hash 581993696, now seen corresponding path program 1 times [2023-11-28 20:20:55,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:55,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820150395] [2023-11-28 20:20:55,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:55,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:55,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:55,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820150395] [2023-11-28 20:20:55,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820150395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:55,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:55,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 20:20:55,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349550653] [2023-11-28 20:20:55,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:55,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:20:55,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:55,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:20:55,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:20:56,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 61 [2023-11-28 20:20:56,027 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) [2023-11-28 20:20:56,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:20:56,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 61 [2023-11-28 20:20:56,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:20:56,195 INFO L124 PetriNetUnfolderBase]: 1088/1554 cut-off events. [2023-11-28 20:20:56,195 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-11-28 20:20:56,197 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. [2023-11-28 20:20:56,207 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 23 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-11-28 20:20:56,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 146 flow [2023-11-28 20:20:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:20:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:20:56,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-28 20:20:56,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6830601092896175 [2023-11-28 20:20:56,208 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-28 20:20:56,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-28 20:20:56,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:20:56,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-28 20:20:56,209 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) [2023-11-28 20:20:56,210 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) [2023-11-28 20:20:56,210 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) [2023-11-28 20:20:56,210 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 102 flow. Second operand 3 states and 125 transitions. [2023-11-28 20:20:56,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 146 flow [2023-11-28 20:20:56,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 42 transitions, 145 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:20:56,212 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 99 flow [2023-11-28 20:20:56,212 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} [2023-11-28 20:20:56,213 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -15 predicate places. [2023-11-28 20:20:56,213 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 99 flow [2023-11-28 20:20:56,214 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) [2023-11-28 20:20:56,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:20:56,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:56,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 20:20:56,214 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)] === [2023-11-28 20:20:56,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:56,215 INFO L85 PathProgramCache]: Analyzing trace with hash -608422970, now seen corresponding path program 1 times [2023-11-28 20:20:56,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:56,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612381415] [2023-11-28 20:20:56,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:56,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:56,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:56,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612381415] [2023-11-28 20:20:56,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612381415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:56,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:56,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 20:20:56,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403734991] [2023-11-28 20:20:56,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:56,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:20:56,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:56,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:20:56,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:20:56,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 61 [2023-11-28 20:20:56,298 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) [2023-11-28 20:20:56,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:20:56,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 61 [2023-11-28 20:20:56,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:20:56,461 INFO L124 PetriNetUnfolderBase]: 1108/1554 cut-off events. [2023-11-28 20:20:56,461 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-28 20:20:56,463 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. [2023-11-28 20:20:56,473 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 23 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-11-28 20:20:56,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 40 transitions, 143 flow [2023-11-28 20:20:56,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:20:56,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:20:56,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-28 20:20:56,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6830601092896175 [2023-11-28 20:20:56,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-28 20:20:56,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-28 20:20:56,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:20:56,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-28 20:20:56,476 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) [2023-11-28 20:20:56,477 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) [2023-11-28 20:20:56,477 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) [2023-11-28 20:20:56,477 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 99 flow. Second operand 3 states and 125 transitions. [2023-11-28 20:20:56,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 40 transitions, 143 flow [2023-11-28 20:20:56,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 40 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:20:56,479 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 96 flow [2023-11-28 20:20:56,479 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} [2023-11-28 20:20:56,479 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -16 predicate places. [2023-11-28 20:20:56,480 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 96 flow [2023-11-28 20:20:56,480 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) [2023-11-28 20:20:56,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:20:56,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:56,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-28 20:20:56,480 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)] === [2023-11-28 20:20:56,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:56,481 INFO L85 PathProgramCache]: Analyzing trace with hash -608422969, now seen corresponding path program 1 times [2023-11-28 20:20:56,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:56,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439207996] [2023-11-28 20:20:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:56,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:56,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:56,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439207996] [2023-11-28 20:20:56,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439207996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:56,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:56,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 20:20:56,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383038418] [2023-11-28 20:20:56,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:56,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:20:56,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:56,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:20:56,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:20:56,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 61 [2023-11-28 20:20:56,590 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) [2023-11-28 20:20:56,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:20:56,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 61 [2023-11-28 20:20:56,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:20:56,752 INFO L124 PetriNetUnfolderBase]: 1056/1472 cut-off events. [2023-11-28 20:20:56,752 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-28 20:20:56,754 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. [2023-11-28 20:20:56,762 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 21 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-11-28 20:20:56,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 38 transitions, 136 flow [2023-11-28 20:20:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:20:56,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:20:56,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-28 20:20:56,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7049180327868853 [2023-11-28 20:20:56,764 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-28 20:20:56,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-28 20:20:56,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:20:56,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-28 20:20:56,765 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) [2023-11-28 20:20:56,766 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) [2023-11-28 20:20:56,766 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) [2023-11-28 20:20:56,766 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 96 flow. Second operand 3 states and 129 transitions. [2023-11-28 20:20:56,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 38 transitions, 136 flow [2023-11-28 20:20:56,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:20:56,768 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 93 flow [2023-11-28 20:20:56,768 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} [2023-11-28 20:20:56,769 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -17 predicate places. [2023-11-28 20:20:56,769 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 93 flow [2023-11-28 20:20:56,769 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) [2023-11-28 20:20:56,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:20:56,769 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] [2023-11-28 20:20:56,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-28 20:20:56,769 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)] === [2023-11-28 20:20:56,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:56,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1417066188, now seen corresponding path program 1 times [2023-11-28 20:20:56,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:56,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689887602] [2023-11-28 20:20:56,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:56,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:56,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:56,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:56,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689887602] [2023-11-28 20:20:56,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689887602] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:56,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:56,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:20:56,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336857693] [2023-11-28 20:20:56,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:56,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:20:56,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:56,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:20:56,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:20:56,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-28 20:20:56,924 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) [2023-11-28 20:20:56,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:20:56,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-28 20:20:56,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:20:57,144 INFO L124 PetriNetUnfolderBase]: 1367/1869 cut-off events. [2023-11-28 20:20:57,144 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-28 20:20:57,147 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. [2023-11-28 20:20:57,156 INFO L140 encePairwiseOnDemand]: 55/61 looper letters, 35 selfloop transitions, 5 changer transitions 1/57 dead transitions. [2023-11-28 20:20:57,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 57 transitions, 220 flow [2023-11-28 20:20:57,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:20:57,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:20:57,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2023-11-28 20:20:57,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8360655737704918 [2023-11-28 20:20:57,158 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 153 transitions. [2023-11-28 20:20:57,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 153 transitions. [2023-11-28 20:20:57,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:20:57,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 153 transitions. [2023-11-28 20:20:57,159 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) [2023-11-28 20:20:57,160 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) [2023-11-28 20:20:57,160 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) [2023-11-28 20:20:57,160 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 93 flow. Second operand 3 states and 153 transitions. [2023-11-28 20:20:57,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 57 transitions, 220 flow [2023-11-28 20:20:57,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 57 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:20:57,162 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 125 flow [2023-11-28 20:20:57,162 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} [2023-11-28 20:20:57,163 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -15 predicate places. [2023-11-28 20:20:57,163 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 125 flow [2023-11-28 20:20:57,163 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) [2023-11-28 20:20:57,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:20:57,163 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] [2023-11-28 20:20:57,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-28 20:20:57,163 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)] === [2023-11-28 20:20:57,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:57,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1052824306, now seen corresponding path program 1 times [2023-11-28 20:20:57,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:57,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952141963] [2023-11-28 20:20:57,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:57,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:57,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:57,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952141963] [2023-11-28 20:20:57,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952141963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:57,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:57,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:20:57,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272936713] [2023-11-28 20:20:57,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:57,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:20:57,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:57,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:20:57,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:20:57,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-28 20:20:57,286 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) [2023-11-28 20:20:57,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:20:57,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-28 20:20:57,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:20:57,664 INFO L124 PetriNetUnfolderBase]: 1593/2178 cut-off events. [2023-11-28 20:20:57,664 INFO L125 PetriNetUnfolderBase]: For 506/506 co-relation queries the response was YES. [2023-11-28 20:20:57,668 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. [2023-11-28 20:20:57,680 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 66 selfloop transitions, 10 changer transitions 0/92 dead transitions. [2023-11-28 20:20:57,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 92 transitions, 421 flow [2023-11-28 20:20:57,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:20:57,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 20:20:57,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 255 transitions. [2023-11-28 20:20:57,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8360655737704918 [2023-11-28 20:20:57,682 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 255 transitions. [2023-11-28 20:20:57,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 255 transitions. [2023-11-28 20:20:57,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:20:57,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 255 transitions. [2023-11-28 20:20:57,683 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) [2023-11-28 20:20:57,684 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) [2023-11-28 20:20:57,684 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) [2023-11-28 20:20:57,684 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 125 flow. Second operand 5 states and 255 transitions. [2023-11-28 20:20:57,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 92 transitions, 421 flow [2023-11-28 20:20:57,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 92 transitions, 413 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:20:57,688 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 185 flow [2023-11-28 20:20:57,688 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} [2023-11-28 20:20:57,689 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -10 predicate places. [2023-11-28 20:20:57,689 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 185 flow [2023-11-28 20:20:57,690 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) [2023-11-28 20:20:57,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:20:57,690 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] [2023-11-28 20:20:57,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-28 20:20:57,690 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)] === [2023-11-28 20:20:57,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:57,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1140423435, now seen corresponding path program 1 times [2023-11-28 20:20:57,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:57,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088300553] [2023-11-28 20:20:57,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:57,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:57,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:57,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088300553] [2023-11-28 20:20:57,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088300553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:57,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:57,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:20:57,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859024400] [2023-11-28 20:20:57,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:57,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:20:57,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:57,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:20:57,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:20:57,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-28 20:20:57,815 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) [2023-11-28 20:20:57,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:20:57,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-28 20:20:57,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:20:58,166 INFO L124 PetriNetUnfolderBase]: 1547/2150 cut-off events. [2023-11-28 20:20:58,166 INFO L125 PetriNetUnfolderBase]: For 1808/1817 co-relation queries the response was YES. [2023-11-28 20:20:58,170 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. [2023-11-28 20:20:58,182 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 65 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2023-11-28 20:20:58,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 89 transitions, 442 flow [2023-11-28 20:20:58,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:20:58,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 20:20:58,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 253 transitions. [2023-11-28 20:20:58,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8295081967213115 [2023-11-28 20:20:58,186 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 253 transitions. [2023-11-28 20:20:58,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 253 transitions. [2023-11-28 20:20:58,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:20:58,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 253 transitions. [2023-11-28 20:20:58,188 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) [2023-11-28 20:20:58,189 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) [2023-11-28 20:20:58,189 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) [2023-11-28 20:20:58,189 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 185 flow. Second operand 5 states and 253 transitions. [2023-11-28 20:20:58,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 89 transitions, 442 flow [2023-11-28 20:20:58,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 89 transitions, 442 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-28 20:20:58,194 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 199 flow [2023-11-28 20:20:58,194 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} [2023-11-28 20:20:58,195 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -5 predicate places. [2023-11-28 20:20:58,195 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 199 flow [2023-11-28 20:20:58,195 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) [2023-11-28 20:20:58,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:20:58,195 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] [2023-11-28 20:20:58,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-28 20:20:58,196 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)] === [2023-11-28 20:20:58,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:58,196 INFO L85 PathProgramCache]: Analyzing trace with hash -148571532, now seen corresponding path program 2 times [2023-11-28 20:20:58,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:58,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157071496] [2023-11-28 20:20:58,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:58,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:58,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:58,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157071496] [2023-11-28 20:20:58,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157071496] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:20:58,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112980855] [2023-11-28 20:20:58,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:20:58,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:58,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:20:58,316 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:20:58,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:20:58,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:20:58,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:20:58,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:20:58,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:20:58,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:58,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:20:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:58,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112980855] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:20:58,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:20:58,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-28 20:20:58,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795559888] [2023-11-28 20:20:58,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:20:58,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:20:58,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:58,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:20:58,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:20:58,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-28 20:20:58,782 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) [2023-11-28 20:20:58,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:20:58,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-28 20:20:58,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:20:59,139 INFO L124 PetriNetUnfolderBase]: 1472/2134 cut-off events. [2023-11-28 20:20:59,139 INFO L125 PetriNetUnfolderBase]: For 2656/2656 co-relation queries the response was YES. [2023-11-28 20:20:59,144 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. [2023-11-28 20:20:59,157 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 65 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2023-11-28 20:20:59,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 89 transitions, 474 flow [2023-11-28 20:20:59,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:20:59,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 20:20:59,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 254 transitions. [2023-11-28 20:20:59,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8327868852459016 [2023-11-28 20:20:59,159 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 254 transitions. [2023-11-28 20:20:59,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 254 transitions. [2023-11-28 20:20:59,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:20:59,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 254 transitions. [2023-11-28 20:20:59,161 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) [2023-11-28 20:20:59,161 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) [2023-11-28 20:20:59,162 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) [2023-11-28 20:20:59,162 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 199 flow. Second operand 5 states and 254 transitions. [2023-11-28 20:20:59,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 89 transitions, 474 flow [2023-11-28 20:20:59,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 89 transitions, 467 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:20:59,168 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 242 flow [2023-11-28 20:20:59,191 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} [2023-11-28 20:20:59,192 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2023-11-28 20:20:59,192 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 242 flow [2023-11-28 20:20:59,192 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) [2023-11-28 20:20:59,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:20:59,192 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] [2023-11-28 20:20:59,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-28 20:20:59,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:59,397 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)] === [2023-11-28 20:20:59,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:59,397 INFO L85 PathProgramCache]: Analyzing trace with hash -406650066, now seen corresponding path program 1 times [2023-11-28 20:20:59,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:59,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490118692] [2023-11-28 20:20:59,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:59,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:59,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:59,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490118692] [2023-11-28 20:20:59,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490118692] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:59,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:59,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:20:59,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306897999] [2023-11-28 20:20:59,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:59,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:20:59,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:59,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:20:59,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:20:59,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-28 20:20:59,529 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) [2023-11-28 20:20:59,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:20:59,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-28 20:20:59,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:20:59,907 INFO L124 PetriNetUnfolderBase]: 1783/2574 cut-off events. [2023-11-28 20:20:59,907 INFO L125 PetriNetUnfolderBase]: For 6416/6428 co-relation queries the response was YES. [2023-11-28 20:20:59,913 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. [2023-11-28 20:20:59,930 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 91 selfloop transitions, 8 changer transitions 0/115 dead transitions. [2023-11-28 20:20:59,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 115 transitions, 833 flow [2023-11-28 20:20:59,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:20:59,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 20:20:59,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 248 transitions. [2023-11-28 20:20:59,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8131147540983606 [2023-11-28 20:20:59,932 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 248 transitions. [2023-11-28 20:20:59,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 248 transitions. [2023-11-28 20:20:59,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:20:59,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 248 transitions. [2023-11-28 20:20:59,933 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) [2023-11-28 20:20:59,934 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) [2023-11-28 20:20:59,934 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) [2023-11-28 20:20:59,934 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 242 flow. Second operand 5 states and 248 transitions. [2023-11-28 20:20:59,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 115 transitions, 833 flow [2023-11-28 20:20:59,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 115 transitions, 808 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-28 20:20:59,942 INFO L231 Difference]: Finished difference. Result has 71 places, 56 transitions, 288 flow [2023-11-28 20:20:59,942 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} [2023-11-28 20:20:59,943 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 6 predicate places. [2023-11-28 20:20:59,943 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 56 transitions, 288 flow [2023-11-28 20:20:59,943 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) [2023-11-28 20:20:59,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:20:59,944 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] [2023-11-28 20:20:59,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-28 20:20:59,944 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)] === [2023-11-28 20:20:59,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:59,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1061739043, now seen corresponding path program 1 times [2023-11-28 20:20:59,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:59,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022938960] [2023-11-28 20:20:59,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:59,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:00,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:00,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022938960] [2023-11-28 20:21:00,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022938960] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:00,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:00,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:21:00,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619987303] [2023-11-28 20:21:00,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:00,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:21:00,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:00,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:21:00,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:21:00,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-28 20:21:00,060 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) [2023-11-28 20:21:00,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:21:00,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-28 20:21:00,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:21:00,456 INFO L124 PetriNetUnfolderBase]: 1750/2431 cut-off events. [2023-11-28 20:21:00,457 INFO L125 PetriNetUnfolderBase]: For 6905/6923 co-relation queries the response was YES. [2023-11-28 20:21:00,463 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. [2023-11-28 20:21:00,480 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 93 selfloop transitions, 10 changer transitions 0/119 dead transitions. [2023-11-28 20:21:00,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 119 transitions, 890 flow [2023-11-28 20:21:00,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:21:00,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 20:21:00,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 246 transitions. [2023-11-28 20:21:00,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8065573770491803 [2023-11-28 20:21:00,482 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 246 transitions. [2023-11-28 20:21:00,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 246 transitions. [2023-11-28 20:21:00,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:21:00,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 246 transitions. [2023-11-28 20:21:00,483 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) [2023-11-28 20:21:00,484 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) [2023-11-28 20:21:00,484 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) [2023-11-28 20:21:00,485 INFO L175 Difference]: Start difference. First operand has 71 places, 56 transitions, 288 flow. Second operand 5 states and 246 transitions. [2023-11-28 20:21:00,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 119 transitions, 890 flow [2023-11-28 20:21:00,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 119 transitions, 890 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-28 20:21:00,498 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 351 flow [2023-11-28 20:21:00,498 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} [2023-11-28 20:21:00,499 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 11 predicate places. [2023-11-28 20:21:00,499 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 351 flow [2023-11-28 20:21:00,499 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) [2023-11-28 20:21:00,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:21:00,499 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] [2023-11-28 20:21:00,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-28 20:21:00,499 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)] === [2023-11-28 20:21:00,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:00,500 INFO L85 PathProgramCache]: Analyzing trace with hash -2000751540, now seen corresponding path program 2 times [2023-11-28 20:21:00,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:00,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914149537] [2023-11-28 20:21:00,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:00,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:00,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:00,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914149537] [2023-11-28 20:21:00,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914149537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:00,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:00,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:21:00,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112414494] [2023-11-28 20:21:00,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:00,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:21:00,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:00,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:21:00,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:21:00,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-28 20:21:00,612 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) [2023-11-28 20:21:00,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:21:00,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-28 20:21:00,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:21:00,930 INFO L124 PetriNetUnfolderBase]: 1577/2196 cut-off events. [2023-11-28 20:21:00,930 INFO L125 PetriNetUnfolderBase]: For 7018/7026 co-relation queries the response was YES. [2023-11-28 20:21:00,935 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. [2023-11-28 20:21:00,946 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 88 selfloop transitions, 9 changer transitions 4/117 dead transitions. [2023-11-28 20:21:00,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 117 transitions, 899 flow [2023-11-28 20:21:00,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:21:00,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 20:21:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 246 transitions. [2023-11-28 20:21:00,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8065573770491803 [2023-11-28 20:21:00,948 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 246 transitions. [2023-11-28 20:21:00,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 246 transitions. [2023-11-28 20:21:00,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:21:00,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 246 transitions. [2023-11-28 20:21:00,949 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) [2023-11-28 20:21:00,950 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) [2023-11-28 20:21:00,950 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) [2023-11-28 20:21:00,950 INFO L175 Difference]: Start difference. First operand has 76 places, 61 transitions, 351 flow. Second operand 5 states and 246 transitions. [2023-11-28 20:21:00,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 117 transitions, 899 flow [2023-11-28 20:21:00,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 117 transitions, 886 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-28 20:21:00,963 INFO L231 Difference]: Finished difference. Result has 80 places, 60 transitions, 351 flow [2023-11-28 20:21:00,963 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} [2023-11-28 20:21:00,963 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 15 predicate places. [2023-11-28 20:21:00,963 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 60 transitions, 351 flow [2023-11-28 20:21:00,964 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) [2023-11-28 20:21:00,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:21:00,964 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] [2023-11-28 20:21:00,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-28 20:21:00,964 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)] === [2023-11-28 20:21:00,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:00,965 INFO L85 PathProgramCache]: Analyzing trace with hash -221744387, now seen corresponding path program 2 times [2023-11-28 20:21:00,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:00,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514411475] [2023-11-28 20:21:00,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:00,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:01,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:01,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514411475] [2023-11-28 20:21:01,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514411475] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:21:01,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962015203] [2023-11-28 20:21:01,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:21:01,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:01,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:01,054 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:01,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:21:01,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:21:01,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:21:01,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:21:01,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:01,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:01,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962015203] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:01,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:21:01,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-28 20:21:01,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468170312] [2023-11-28 20:21:01,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:01,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:21:01,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:01,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:21:01,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:21:01,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-28 20:21:01,469 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) [2023-11-28 20:21:01,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:21:01,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-28 20:21:01,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:21:01,892 INFO L124 PetriNetUnfolderBase]: 1515/2232 cut-off events. [2023-11-28 20:21:01,892 INFO L125 PetriNetUnfolderBase]: For 7282/7292 co-relation queries the response was YES. [2023-11-28 20:21:01,900 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. [2023-11-28 20:21:01,919 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 91 selfloop transitions, 8 changer transitions 0/115 dead transitions. [2023-11-28 20:21:01,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 115 transitions, 911 flow [2023-11-28 20:21:01,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:21:01,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 20:21:01,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 243 transitions. [2023-11-28 20:21:01,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7967213114754098 [2023-11-28 20:21:01,921 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 243 transitions. [2023-11-28 20:21:01,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 243 transitions. [2023-11-28 20:21:01,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:21:01,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 243 transitions. [2023-11-28 20:21:01,923 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) [2023-11-28 20:21:01,924 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) [2023-11-28 20:21:01,924 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) [2023-11-28 20:21:01,924 INFO L175 Difference]: Start difference. First operand has 80 places, 60 transitions, 351 flow. Second operand 5 states and 243 transitions. [2023-11-28 20:21:01,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 115 transitions, 911 flow [2023-11-28 20:21:01,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 115 transitions, 902 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-28 20:21:01,939 INFO L231 Difference]: Finished difference. Result has 85 places, 63 transitions, 392 flow [2023-11-28 20:21:01,939 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} [2023-11-28 20:21:01,939 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 20 predicate places. [2023-11-28 20:21:01,940 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 63 transitions, 392 flow [2023-11-28 20:21:01,940 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) [2023-11-28 20:21:01,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:21:01,940 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] [2023-11-28 20:21:01,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-28 20:21:02,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-28 20:21:02,141 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)] === [2023-11-28 20:21:02,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:02,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1746552691, now seen corresponding path program 2 times [2023-11-28 20:21:02,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:02,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252595246] [2023-11-28 20:21:02,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:02,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:02,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:02,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252595246] [2023-11-28 20:21:02,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252595246] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:21:02,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213671094] [2023-11-28 20:21:02,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:21:02,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:02,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:02,232 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:02,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:21:02,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:21:02,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:21:02,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:21:02,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:02,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:02,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213671094] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:02,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:21:02,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-28 20:21:02,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146249926] [2023-11-28 20:21:02,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:02,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:21:02,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:02,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:21:02,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:21:02,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-28 20:21:02,522 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) [2023-11-28 20:21:02,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:21:02,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-28 20:21:02,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:21:02,851 INFO L124 PetriNetUnfolderBase]: 1447/2154 cut-off events. [2023-11-28 20:21:02,851 INFO L125 PetriNetUnfolderBase]: For 6893/6909 co-relation queries the response was YES. [2023-11-28 20:21:02,855 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. [2023-11-28 20:21:02,866 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 111 selfloop transitions, 8 changer transitions 0/135 dead transitions. [2023-11-28 20:21:02,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 135 transitions, 1122 flow [2023-11-28 20:21:02,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:21:02,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 20:21:02,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 251 transitions. [2023-11-28 20:21:02,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8229508196721311 [2023-11-28 20:21:02,867 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 251 transitions. [2023-11-28 20:21:02,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 251 transitions. [2023-11-28 20:21:02,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:21:02,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 251 transitions. [2023-11-28 20:21:02,869 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) [2023-11-28 20:21:02,869 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) [2023-11-28 20:21:02,870 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) [2023-11-28 20:21:02,870 INFO L175 Difference]: Start difference. First operand has 85 places, 63 transitions, 392 flow. Second operand 5 states and 251 transitions. [2023-11-28 20:21:02,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 135 transitions, 1122 flow [2023-11-28 20:21:02,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 135 transitions, 1064 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-11-28 20:21:02,882 INFO L231 Difference]: Finished difference. Result has 89 places, 66 transitions, 429 flow [2023-11-28 20:21:02,882 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} [2023-11-28 20:21:02,882 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 24 predicate places. [2023-11-28 20:21:02,883 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 66 transitions, 429 flow [2023-11-28 20:21:02,883 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) [2023-11-28 20:21:02,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:21:02,883 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] [2023-11-28 20:21:02,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:21:03,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:03,084 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)] === [2023-11-28 20:21:03,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:03,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1495651785, now seen corresponding path program 1 times [2023-11-28 20:21:03,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:03,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034553292] [2023-11-28 20:21:03,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:03,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:05,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:05,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034553292] [2023-11-28 20:21:05,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034553292] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:21:05,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745450386] [2023-11-28 20:21:05,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:05,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:05,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:05,763 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:05,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea2db7eb-ef25-49ab-8ecf-e4bba57a36f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process