./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/singleton.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff 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_d19efab4-ddcb-43ad-a622-e989281091e1/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d19efab4-ddcb-43ad-a622-e989281091e1/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d19efab4-ddcb-43ad-a622-e989281091e1/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d19efab4-ddcb-43ad-a622-e989281091e1/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/singleton.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d19efab4-ddcb-43ad-a622-e989281091e1/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d19efab4-ddcb-43ad-a622-e989281091e1/bin/uautomizer-verify-uCwYo4JHxu --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 ea0ecaab9c4a4889914d1343f60808acf6ec66df89812b70cea6837a39471f7f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:40:32,872 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:40:33,002 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d19efab4-ddcb-43ad-a622-e989281091e1/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:40:33,010 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:40:33,011 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:40:33,056 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:40:33,057 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:40:33,059 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:40:33,060 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:40:33,065 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:40:33,067 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:40:33,068 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:40:33,068 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:40:33,070 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:40:33,070 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:40:33,071 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:40:33,071 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:40:33,072 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:40:33,072 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:40:33,073 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:40:33,073 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:40:33,074 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:40:33,074 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:40:33,075 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:40:33,075 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:40:33,076 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:40:33,076 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:40:33,077 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:40:33,077 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:40:33,078 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:33,078 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:40:33,079 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:40:33,079 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:40:33,079 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:40:33,080 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:40:33,080 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:40:33,080 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:40:33,080 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:40:33,081 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_d19efab4-ddcb-43ad-a622-e989281091e1/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d19efab4-ddcb-43ad-a622-e989281091e1/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ea0ecaab9c4a4889914d1343f60808acf6ec66df89812b70cea6837a39471f7f [2023-11-19 07:40:33,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:40:33,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:40:33,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:40:33,411 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:40:33,413 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:40:33,414 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d19efab4-ddcb-43ad-a622-e989281091e1/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread/singleton.i [2023-11-19 07:40:36,636 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:40:36,981 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:40:36,995 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d19efab4-ddcb-43ad-a622-e989281091e1/sv-benchmarks/c/pthread/singleton.i [2023-11-19 07:40:37,025 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d19efab4-ddcb-43ad-a622-e989281091e1/bin/uautomizer-verify-uCwYo4JHxu/data/416ac62fd/6296ba7494b048068c35ef2f2291af8f/FLAG7e95e809f [2023-11-19 07:40:37,040 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d19efab4-ddcb-43ad-a622-e989281091e1/bin/uautomizer-verify-uCwYo4JHxu/data/416ac62fd/6296ba7494b048068c35ef2f2291af8f [2023-11-19 07:40:37,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:40:37,045 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:40:37,046 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:37,047 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:40:37,053 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:40:37,054 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:37" (1/1) ... [2023-11-19 07:40:37,056 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25420d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:37, skipping insertion in model container [2023-11-19 07:40:37,056 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:37" (1/1) ... [2023-11-19 07:40:37,119 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:40:37,368 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 07:40:37,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:37,811 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:40:37,841 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 07:40:37,896 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:37,976 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:40:37,977 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:40:37,977 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:40:37,986 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:40:37,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:37 WrapperNode [2023-11-19 07:40:37,987 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:37,993 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:37,994 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:40:37,994 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:40:38,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:37" (1/1) ... [2023-11-19 07:40:38,031 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:37" (1/1) ... [2023-11-19 07:40:38,065 INFO L138 Inliner]: procedures = 325, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 37 [2023-11-19 07:40:38,066 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:38,067 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:40:38,067 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:40:38,067 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:40:38,077 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:37" (1/1) ... [2023-11-19 07:40:38,077 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:37" (1/1) ... [2023-11-19 07:40:38,082 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:37" (1/1) ... [2023-11-19 07:40:38,083 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:37" (1/1) ... [2023-11-19 07:40:38,099 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:37" (1/1) ... [2023-11-19 07:40:38,108 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:37" (1/1) ... [2023-11-19 07:40:38,111 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:37" (1/1) ... [2023-11-19 07:40:38,113 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:37" (1/1) ... [2023-11-19 07:40:38,117 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:40:38,118 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:40:38,118 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:40:38,118 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:40:38,119 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:37" (1/1) ... [2023-11-19 07:40:38,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:38,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d19efab4-ddcb-43ad-a622-e989281091e1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:38,176 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d19efab4-ddcb-43ad-a622-e989281091e1/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:40:38,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d19efab4-ddcb-43ad-a622-e989281091e1/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:40:38,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:40:38,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:40:38,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:40:38,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:40:38,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:40:38,221 INFO L130 BoogieDeclarations]: Found specification of procedure thread0 [2023-11-19 07:40:38,221 INFO L138 BoogieDeclarations]: Found implementation of procedure thread0 [2023-11-19 07:40:38,221 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:40:38,222 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:40:38,222 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:40:38,222 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:40:38,224 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:40:38,225 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:40:38,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:40:38,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:40:38,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:40:38,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:40:38,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:40:38,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:40:38,227 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:40:38,450 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:40:38,452 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:40:38,851 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:40:38,887 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:40:38,887 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 07:40:38,892 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:38 BoogieIcfgContainer [2023-11-19 07:40:38,892 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:40:38,903 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:40:38,903 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:40:38,906 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:40:38,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:40:37" (1/3) ... [2023-11-19 07:40:38,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3179ee35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:38, skipping insertion in model container [2023-11-19 07:40:38,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:37" (2/3) ... [2023-11-19 07:40:38,908 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3179ee35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:38, skipping insertion in model container [2023-11-19 07:40:38,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:38" (3/3) ... [2023-11-19 07:40:38,909 INFO L112 eAbstractionObserver]: Analyzing ICFG singleton.i [2023-11-19 07:40:38,933 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:40:38,933 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-11-19 07:40:38,933 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:40:39,194 INFO L144 ThreadInstanceAdder]: Constructed 21 joinOtherThreadTransitions. [2023-11-19 07:40:39,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 249 transitions, 595 flow [2023-11-19 07:40:39,317 INFO L124 PetriNetUnfolderBase]: 7/170 cut-off events. [2023-11-19 07:40:39,317 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:40:39,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 170 events. 7/170 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 177 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 145. Up to 3 conditions per place. [2023-11-19 07:40:39,324 INFO L82 GeneralOperation]: Start removeDead. Operand has 258 places, 249 transitions, 595 flow [2023-11-19 07:40:39,332 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 165 transitions, 381 flow [2023-11-19 07:40:39,335 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:40:39,349 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 165 transitions, 381 flow [2023-11-19 07:40:39,352 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 165 transitions, 381 flow [2023-11-19 07:40:39,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 165 transitions, 381 flow [2023-11-19 07:40:39,397 INFO L124 PetriNetUnfolderBase]: 7/165 cut-off events. [2023-11-19 07:40:39,397 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:40:39,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 165 events. 7/165 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 178 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 143. Up to 3 conditions per place. [2023-11-19 07:40:39,402 INFO L119 LiptonReduction]: Number of co-enabled transitions 2920 [2023-11-19 07:40:43,507 INFO L134 LiptonReduction]: Checked pairs total: 7073 [2023-11-19 07:40:43,508 INFO L136 LiptonReduction]: Total number of compositions: 134 [2023-11-19 07:40:43,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:40:43,543 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;@310ab499, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:40:43,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-11-19 07:40:43,546 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:40:43,546 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:40:43,546 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:40:43,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:43,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 07:40:43,548 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-19 07:40:43,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:43,551 INFO L85 PathProgramCache]: Analyzing trace with hash 649, now seen corresponding path program 1 times [2023-11-19 07:40:43,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:43,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633944380] [2023-11-19 07:40:43,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:43,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:43,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:43,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633944380] [2023-11-19 07:40:43,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633944380] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:43,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:43,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 07:40:43,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67214581] [2023-11-19 07:40:43,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:43,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:40:43,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:43,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:40:43,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:40:43,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 385 [2023-11-19 07:40:43,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 85 transitions, 221 flow. Second operand has 2 states, 2 states have (on average 205.5) internal successors, (411), 2 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:43,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:43,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 385 [2023-11-19 07:40:43,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:47,251 INFO L124 PetriNetUnfolderBase]: 19442/26684 cut-off events. [2023-11-19 07:40:47,252 INFO L125 PetriNetUnfolderBase]: For 721/721 co-relation queries the response was YES. [2023-11-19 07:40:47,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53387 conditions, 26684 events. 19442/26684 cut-off events. For 721/721 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 145264 event pairs, 19098 based on Foata normal form. 0/9507 useless extension candidates. Maximal degree in co-relation 53362. Up to 25317 conditions per place. [2023-11-19 07:40:47,504 INFO L140 encePairwiseOnDemand]: 383/385 looper letters, 65 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2023-11-19 07:40:47,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 83 transitions, 347 flow [2023-11-19 07:40:47,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:40:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:40:47,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 477 transitions. [2023-11-19 07:40:47,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6194805194805195 [2023-11-19 07:40:47,528 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 477 transitions. [2023-11-19 07:40:47,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 477 transitions. [2023-11-19 07:40:47,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:47,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 477 transitions. [2023-11-19 07:40:47,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 238.5) internal successors, (477), 2 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:47,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 385.0) internal successors, (1155), 3 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:47,551 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 385.0) internal successors, (1155), 3 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:47,553 INFO L175 Difference]: Start difference. First operand has 99 places, 85 transitions, 221 flow. Second operand 2 states and 477 transitions. [2023-11-19 07:40:47,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 83 transitions, 347 flow [2023-11-19 07:40:47,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 313 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-19 07:40:47,661 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 183 flow [2023-11-19 07:40:47,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=183, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2023-11-19 07:40:47,668 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -13 predicate places. [2023-11-19 07:40:47,668 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 183 flow [2023-11-19 07:40:47,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 205.5) internal successors, (411), 2 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:47,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:47,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:40:47,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:40:47,670 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-19 07:40:47,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:47,671 INFO L85 PathProgramCache]: Analyzing trace with hash 636350, now seen corresponding path program 1 times [2023-11-19 07:40:47,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:47,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006603228] [2023-11-19 07:40:47,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:47,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:47,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:47,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006603228] [2023-11-19 07:40:47,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006603228] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:47,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:47,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:40:47,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547893235] [2023-11-19 07:40:47,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:47,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:47,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:47,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:47,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:48,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 385 [2023-11-19 07:40:48,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:48,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:48,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 385 [2023-11-19 07:40:48,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:50,386 INFO L124 PetriNetUnfolderBase]: 14219/19666 cut-off events. [2023-11-19 07:40:50,386 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-11-19 07:40:50,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38568 conditions, 19666 events. 14219/19666 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 104153 event pairs, 13951 based on Foata normal form. 0/7508 useless extension candidates. Maximal degree in co-relation 38565. Up to 18601 conditions per place. [2023-11-19 07:40:50,508 INFO L140 encePairwiseOnDemand]: 376/385 looper letters, 68 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2023-11-19 07:40:50,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 94 transitions, 358 flow [2023-11-19 07:40:50,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:50,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:40:50,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 635 transitions. [2023-11-19 07:40:50,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5497835497835498 [2023-11-19 07:40:50,513 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 635 transitions. [2023-11-19 07:40:50,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 635 transitions. [2023-11-19 07:40:50,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:50,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 635 transitions. [2023-11-19 07:40:50,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:50,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:50,526 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:50,527 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 183 flow. Second operand 3 states and 635 transitions. [2023-11-19 07:40:50,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 94 transitions, 358 flow [2023-11-19 07:40:50,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 94 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:40:50,538 INFO L231 Difference]: Finished difference. Result has 90 places, 89 transitions, 241 flow [2023-11-19 07:40:50,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=90, PETRI_TRANSITIONS=89} [2023-11-19 07:40:50,540 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -9 predicate places. [2023-11-19 07:40:50,540 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 89 transitions, 241 flow [2023-11-19 07:40:50,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:50,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:50,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:40:50,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:40:50,542 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-19 07:40:50,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:50,542 INFO L85 PathProgramCache]: Analyzing trace with hash 636351, now seen corresponding path program 1 times [2023-11-19 07:40:50,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:50,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755467888] [2023-11-19 07:40:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:50,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:50,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:50,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:50,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755467888] [2023-11-19 07:40:50,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755467888] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:50,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:50,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:40:50,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091027151] [2023-11-19 07:40:50,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:50,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:50,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:50,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:50,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:50,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 385 [2023-11-19 07:40:50,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 241 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:50,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:50,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 385 [2023-11-19 07:40:50,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:53,800 INFO L124 PetriNetUnfolderBase]: 17985/25241 cut-off events. [2023-11-19 07:40:53,801 INFO L125 PetriNetUnfolderBase]: For 1566/1566 co-relation queries the response was YES. [2023-11-19 07:40:53,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51000 conditions, 25241 events. 17985/25241 cut-off events. For 1566/1566 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 143897 event pairs, 16169 based on Foata normal form. 1/10996 useless extension candidates. Maximal degree in co-relation 50995. Up to 17185 conditions per place. [2023-11-19 07:40:53,962 INFO L140 encePairwiseOnDemand]: 373/385 looper letters, 124 selfloop transitions, 13 changer transitions 0/152 dead transitions. [2023-11-19 07:40:53,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 152 transitions, 673 flow [2023-11-19 07:40:53,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:53,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:40:53,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 705 transitions. [2023-11-19 07:40:53,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6103896103896104 [2023-11-19 07:40:53,966 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 705 transitions. [2023-11-19 07:40:53,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 705 transitions. [2023-11-19 07:40:53,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:53,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 705 transitions. [2023-11-19 07:40:53,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:53,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:53,976 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:53,976 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 241 flow. Second operand 3 states and 705 transitions. [2023-11-19 07:40:53,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 152 transitions, 673 flow [2023-11-19 07:40:53,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 152 transitions, 655 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:40:53,986 INFO L231 Difference]: Finished difference. Result has 92 places, 98 transitions, 319 flow [2023-11-19 07:40:53,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=92, PETRI_TRANSITIONS=98} [2023-11-19 07:40:53,988 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -7 predicate places. [2023-11-19 07:40:53,989 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 319 flow [2023-11-19 07:40:53,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:53,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:53,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:40:53,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:40:53,995 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-19 07:40:53,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:53,996 INFO L85 PathProgramCache]: Analyzing trace with hash 19725438, now seen corresponding path program 1 times [2023-11-19 07:40:53,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:53,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858833020] [2023-11-19 07:40:53,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:53,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:54,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:54,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858833020] [2023-11-19 07:40:54,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858833020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:54,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:54,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:40:54,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108286657] [2023-11-19 07:40:54,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:54,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:40:54,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:54,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:40:54,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:40:54,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 385 [2023-11-19 07:40:54,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 98 transitions, 319 flow. Second operand has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:54,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:54,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 385 [2023-11-19 07:40:54,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:56,368 INFO L124 PetriNetUnfolderBase]: 12756/18205 cut-off events. [2023-11-19 07:40:56,369 INFO L125 PetriNetUnfolderBase]: For 10314/10314 co-relation queries the response was YES. [2023-11-19 07:40:56,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40151 conditions, 18205 events. 12756/18205 cut-off events. For 10314/10314 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 102648 event pairs, 12482 based on Foata normal form. 1469/8987 useless extension candidates. Maximal degree in co-relation 40145. Up to 17150 conditions per place. [2023-11-19 07:40:56,494 INFO L140 encePairwiseOnDemand]: 376/385 looper letters, 76 selfloop transitions, 10 changer transitions 0/101 dead transitions. [2023-11-19 07:40:56,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 101 transitions, 496 flow [2023-11-19 07:40:56,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:40:56,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:40:56,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 791 transitions. [2023-11-19 07:40:56,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136363636363637 [2023-11-19 07:40:56,499 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 791 transitions. [2023-11-19 07:40:56,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 791 transitions. [2023-11-19 07:40:56,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:56,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 791 transitions. [2023-11-19 07:40:56,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:56,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 385.0) internal successors, (1925), 5 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:56,510 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 385.0) internal successors, (1925), 5 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:56,510 INFO L175 Difference]: Start difference. First operand has 92 places, 98 transitions, 319 flow. Second operand 4 states and 791 transitions. [2023-11-19 07:40:56,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 101 transitions, 496 flow [2023-11-19 07:40:56,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 101 transitions, 470 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:40:56,523 INFO L231 Difference]: Finished difference. Result has 92 places, 97 transitions, 309 flow [2023-11-19 07:40:56,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=309, PETRI_PLACES=92, PETRI_TRANSITIONS=97} [2023-11-19 07:40:56,524 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -7 predicate places. [2023-11-19 07:40:56,524 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 97 transitions, 309 flow [2023-11-19 07:40:56,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:56,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:56,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:56,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:40:56,526 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-19 07:40:56,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:56,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1688539475, now seen corresponding path program 1 times [2023-11-19 07:40:56,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:56,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507573860] [2023-11-19 07:40:56,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:56,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:56,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:56,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507573860] [2023-11-19 07:40:56,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507573860] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:56,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:56,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:40:56,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87881722] [2023-11-19 07:40:56,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:56,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:40:56,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:56,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:40:56,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:40:57,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 385 [2023-11-19 07:40:57,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 97 transitions, 309 flow. Second operand has 4 states, 4 states have (on average 186.5) internal successors, (746), 4 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:57,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:57,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 385 [2023-11-19 07:40:57,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:59,136 INFO L124 PetriNetUnfolderBase]: 12745/18177 cut-off events. [2023-11-19 07:40:59,136 INFO L125 PetriNetUnfolderBase]: For 4468/4468 co-relation queries the response was YES. [2023-11-19 07:40:59,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38598 conditions, 18177 events. 12745/18177 cut-off events. For 4468/4468 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 102539 event pairs, 12471 based on Foata normal form. 0/7509 useless extension candidates. Maximal degree in co-relation 38592. Up to 17103 conditions per place. [2023-11-19 07:40:59,233 INFO L140 encePairwiseOnDemand]: 378/385 looper letters, 69 selfloop transitions, 4 changer transitions 0/93 dead transitions. [2023-11-19 07:40:59,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 93 transitions, 447 flow [2023-11-19 07:40:59,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:40:59,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:40:59,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 808 transitions. [2023-11-19 07:40:59,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5246753246753246 [2023-11-19 07:40:59,238 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 808 transitions. [2023-11-19 07:40:59,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 808 transitions. [2023-11-19 07:40:59,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:59,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 808 transitions. [2023-11-19 07:40:59,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:59,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 385.0) internal successors, (1925), 5 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:59,247 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 385.0) internal successors, (1925), 5 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:59,248 INFO L175 Difference]: Start difference. First operand has 92 places, 97 transitions, 309 flow. Second operand 4 states and 808 transitions. [2023-11-19 07:40:59,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 93 transitions, 447 flow [2023-11-19 07:40:59,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 434 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:40:59,256 INFO L231 Difference]: Finished difference. Result has 89 places, 91 transitions, 285 flow [2023-11-19 07:40:59,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=89, PETRI_TRANSITIONS=91} [2023-11-19 07:40:59,258 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -10 predicate places. [2023-11-19 07:40:59,258 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 91 transitions, 285 flow [2023-11-19 07:40:59,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 186.5) internal successors, (746), 4 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:59,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:59,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:59,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:40:59,259 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-19 07:40:59,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:59,260 INFO L85 PathProgramCache]: Analyzing trace with hash -2120662843, now seen corresponding path program 1 times [2023-11-19 07:40:59,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:59,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741785671] [2023-11-19 07:40:59,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:59,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:59,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:59,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741785671] [2023-11-19 07:40:59,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741785671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:59,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:59,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:59,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628483490] [2023-11-19 07:40:59,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:59,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:40:59,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:59,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:40:59,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:41:00,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 385 [2023-11-19 07:41:00,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 91 transitions, 285 flow. Second operand has 6 states, 6 states have (on average 186.83333333333334) internal successors, (1121), 6 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:00,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:00,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 385 [2023-11-19 07:41:00,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:01,602 INFO L124 PetriNetUnfolderBase]: 7622/11511 cut-off events. [2023-11-19 07:41:01,602 INFO L125 PetriNetUnfolderBase]: For 2923/2923 co-relation queries the response was YES. [2023-11-19 07:41:01,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24238 conditions, 11511 events. 7622/11511 cut-off events. For 2923/2923 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 66138 event pairs, 7349 based on Foata normal form. 0/5456 useless extension candidates. Maximal degree in co-relation 24232. Up to 10435 conditions per place. [2023-11-19 07:41:01,642 INFO L140 encePairwiseOnDemand]: 378/385 looper letters, 66 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2023-11-19 07:41:01,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 90 transitions, 436 flow [2023-11-19 07:41:01,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:41:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:41:01,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 804 transitions. [2023-11-19 07:41:01,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522077922077922 [2023-11-19 07:41:01,647 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 804 transitions. [2023-11-19 07:41:01,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 804 transitions. [2023-11-19 07:41:01,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:01,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 804 transitions. [2023-11-19 07:41:01,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:01,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 385.0) internal successors, (1925), 5 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:01,659 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 385.0) internal successors, (1925), 5 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:01,659 INFO L175 Difference]: Start difference. First operand has 89 places, 91 transitions, 285 flow. Second operand 4 states and 804 transitions. [2023-11-19 07:41:01,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 90 transitions, 436 flow [2023-11-19 07:41:01,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 90 transitions, 428 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:41:01,664 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 279 flow [2023-11-19 07:41:01,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=279, PETRI_PLACES=85, PETRI_TRANSITIONS=87} [2023-11-19 07:41:01,665 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -14 predicate places. [2023-11-19 07:41:01,665 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 279 flow [2023-11-19 07:41:01,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 186.83333333333334) internal successors, (1121), 6 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:01,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:01,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:01,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:41:01,667 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-19 07:41:01,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:01,668 INFO L85 PathProgramCache]: Analyzing trace with hash -2142480950, now seen corresponding path program 1 times [2023-11-19 07:41:01,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:01,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129006858] [2023-11-19 07:41:01,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:01,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:01,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:01,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:01,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129006858] [2023-11-19 07:41:01,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129006858] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:01,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:01,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:01,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237111735] [2023-11-19 07:41:01,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:01,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:01,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:01,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:01,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:01,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 385 [2023-11-19 07:41:01,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 279 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:01,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:01,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 385 [2023-11-19 07:41:01,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:02,989 INFO L124 PetriNetUnfolderBase]: 8105/11790 cut-off events. [2023-11-19 07:41:02,989 INFO L125 PetriNetUnfolderBase]: For 3053/3053 co-relation queries the response was YES. [2023-11-19 07:41:03,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25301 conditions, 11790 events. 8105/11790 cut-off events. For 3053/3053 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 63073 event pairs, 7835 based on Foata normal form. 0/5849 useless extension candidates. Maximal degree in co-relation 25295. Up to 11097 conditions per place. [2023-11-19 07:41:03,049 INFO L140 encePairwiseOnDemand]: 381/385 looper letters, 66 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-11-19 07:41:03,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 86 transitions, 419 flow [2023-11-19 07:41:03,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:03,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:41:03,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 624 transitions. [2023-11-19 07:41:03,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5402597402597402 [2023-11-19 07:41:03,055 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 624 transitions. [2023-11-19 07:41:03,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 624 transitions. [2023-11-19 07:41:03,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:03,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 624 transitions. [2023-11-19 07:41:03,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:03,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:03,061 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:03,061 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 279 flow. Second operand 3 states and 624 transitions. [2023-11-19 07:41:03,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 86 transitions, 419 flow [2023-11-19 07:41:03,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 86 transitions, 409 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:41:03,066 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 271 flow [2023-11-19 07:41:03,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=271, PETRI_PLACES=82, PETRI_TRANSITIONS=85} [2023-11-19 07:41:03,067 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -17 predicate places. [2023-11-19 07:41:03,067 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 271 flow [2023-11-19 07:41:03,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:03,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:03,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:03,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:41:03,069 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-19 07:41:03,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:03,069 INFO L85 PathProgramCache]: Analyzing trace with hash -2142480949, now seen corresponding path program 1 times [2023-11-19 07:41:03,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:03,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379317027] [2023-11-19 07:41:03,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:03,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:03,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:03,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379317027] [2023-11-19 07:41:03,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379317027] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:03,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:03,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:41:03,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388538305] [2023-11-19 07:41:03,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:03,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:41:03,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:03,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:41:03,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:41:03,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 385 [2023-11-19 07:41:03,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 85 transitions, 271 flow. Second operand has 5 states, 5 states have (on average 187.6) internal successors, (938), 5 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:03,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:03,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 385 [2023-11-19 07:41:03,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:05,158 INFO L124 PetriNetUnfolderBase]: 8092/11573 cut-off events. [2023-11-19 07:41:05,158 INFO L125 PetriNetUnfolderBase]: For 3042/3042 co-relation queries the response was YES. [2023-11-19 07:41:05,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25046 conditions, 11573 events. 8092/11573 cut-off events. For 3042/3042 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 59693 event pairs, 7820 based on Foata normal form. 0/5650 useless extension candidates. Maximal degree in co-relation 25040. Up to 11072 conditions per place. [2023-11-19 07:41:05,244 INFO L140 encePairwiseOnDemand]: 380/385 looper letters, 65 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2023-11-19 07:41:05,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 424 flow [2023-11-19 07:41:05,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:41:05,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:41:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 801 transitions. [2023-11-19 07:41:05,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5201298701298701 [2023-11-19 07:41:05,249 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 801 transitions. [2023-11-19 07:41:05,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 801 transitions. [2023-11-19 07:41:05,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:05,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 801 transitions. [2023-11-19 07:41:05,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:05,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 385.0) internal successors, (1925), 5 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:05,259 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 385.0) internal successors, (1925), 5 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:05,259 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 271 flow. Second operand 4 states and 801 transitions. [2023-11-19 07:41:05,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 424 flow [2023-11-19 07:41:05,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 86 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:41:05,266 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 271 flow [2023-11-19 07:41:05,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=271, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2023-11-19 07:41:05,267 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -18 predicate places. [2023-11-19 07:41:05,267 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 271 flow [2023-11-19 07:41:05,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 187.6) internal successors, (938), 5 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:05,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:05,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:05,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:41:05,269 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-19 07:41:05,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:05,269 INFO L85 PathProgramCache]: Analyzing trace with hash -2142480997, now seen corresponding path program 1 times [2023-11-19 07:41:05,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:05,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60869541] [2023-11-19 07:41:05,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:05,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:05,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:05,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60869541] [2023-11-19 07:41:05,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60869541] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:05,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:05,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:05,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212246033] [2023-11-19 07:41:05,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:05,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:05,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:05,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:05,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:05,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 385 [2023-11-19 07:41:05,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 271 flow. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:05,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:05,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 385 [2023-11-19 07:41:05,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:05,984 INFO L124 PetriNetUnfolderBase]: 2562/4006 cut-off events. [2023-11-19 07:41:05,984 INFO L125 PetriNetUnfolderBase]: For 1156/1156 co-relation queries the response was YES. [2023-11-19 07:41:05,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8631 conditions, 4006 events. 2562/4006 cut-off events. For 1156/1156 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19234 event pairs, 2424 based on Foata normal form. 0/2436 useless extension candidates. Maximal degree in co-relation 8625. Up to 3617 conditions per place. [2023-11-19 07:41:06,003 INFO L140 encePairwiseOnDemand]: 378/385 looper letters, 58 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2023-11-19 07:41:06,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 81 transitions, 395 flow [2023-11-19 07:41:06,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:06,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:41:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 626 transitions. [2023-11-19 07:41:06,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541991341991342 [2023-11-19 07:41:06,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 626 transitions. [2023-11-19 07:41:06,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 626 transitions. [2023-11-19 07:41:06,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:06,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 626 transitions. [2023-11-19 07:41:06,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:06,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:06,015 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:06,015 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 271 flow. Second operand 3 states and 626 transitions. [2023-11-19 07:41:06,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 81 transitions, 395 flow [2023-11-19 07:41:06,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 81 transitions, 385 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:41:06,020 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 261 flow [2023-11-19 07:41:06,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=261, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2023-11-19 07:41:06,021 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -23 predicate places. [2023-11-19 07:41:06,022 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 261 flow [2023-11-19 07:41:06,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:06,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:06,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:06,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:41:06,023 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-19 07:41:06,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:06,024 INFO L85 PathProgramCache]: Analyzing trace with hash -2142480996, now seen corresponding path program 1 times [2023-11-19 07:41:06,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:06,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204389981] [2023-11-19 07:41:06,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:06,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:06,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:06,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204389981] [2023-11-19 07:41:06,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204389981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:06,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:06,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:06,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373293217] [2023-11-19 07:41:06,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:06,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:06,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:06,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:06,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:06,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 385 [2023-11-19 07:41:06,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 261 flow. Second operand has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:06,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:06,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 385 [2023-11-19 07:41:06,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:06,478 INFO L124 PetriNetUnfolderBase]: 566/1062 cut-off events. [2023-11-19 07:41:06,479 INFO L125 PetriNetUnfolderBase]: For 380/380 co-relation queries the response was YES. [2023-11-19 07:41:06,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2358 conditions, 1062 events. 566/1062 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4170 event pairs, 503 based on Foata normal form. 0/905 useless extension candidates. Maximal degree in co-relation 2352. Up to 904 conditions per place. [2023-11-19 07:41:06,485 INFO L140 encePairwiseOnDemand]: 379/385 looper letters, 61 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-11-19 07:41:06,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 385 flow [2023-11-19 07:41:06,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:06,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:41:06,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 643 transitions. [2023-11-19 07:41:06,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567099567099567 [2023-11-19 07:41:06,490 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 643 transitions. [2023-11-19 07:41:06,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 643 transitions. [2023-11-19 07:41:06,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:06,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 643 transitions. [2023-11-19 07:41:06,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.33333333333334) internal successors, (643), 3 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:06,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:06,499 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:06,499 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 261 flow. Second operand 3 states and 643 transitions. [2023-11-19 07:41:06,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 385 flow [2023-11-19 07:41:06,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 76 transitions, 377 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:41:06,503 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 247 flow [2023-11-19 07:41:06,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=247, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2023-11-19 07:41:06,505 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -28 predicate places. [2023-11-19 07:41:06,505 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 247 flow [2023-11-19 07:41:06,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:06,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:06,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:06,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:41:06,507 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-19 07:41:06,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:06,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1634841385, now seen corresponding path program 1 times [2023-11-19 07:41:06,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:06,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188811078] [2023-11-19 07:41:06,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:06,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:06,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:06,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:06,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188811078] [2023-11-19 07:41:06,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188811078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:06,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:06,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:41:06,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769635796] [2023-11-19 07:41:06,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:06,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:41:06,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:06,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:41:06,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:41:07,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 385 [2023-11-19 07:41:07,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 247 flow. Second operand has 5 states, 5 states have (on average 187.8) internal successors, (939), 5 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:07,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:07,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 385 [2023-11-19 07:41:07,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:07,399 INFO L124 PetriNetUnfolderBase]: 550/998 cut-off events. [2023-11-19 07:41:07,400 INFO L125 PetriNetUnfolderBase]: For 360/360 co-relation queries the response was YES. [2023-11-19 07:41:07,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2246 conditions, 998 events. 550/998 cut-off events. For 360/360 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3698 event pairs, 489 based on Foata normal form. 0/886 useless extension candidates. Maximal degree in co-relation 2240. Up to 847 conditions per place. [2023-11-19 07:41:07,407 INFO L140 encePairwiseOnDemand]: 378/385 looper letters, 54 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2023-11-19 07:41:07,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 73 transitions, 374 flow [2023-11-19 07:41:07,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:41:07,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:41:07,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 792 transitions. [2023-11-19 07:41:07,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2023-11-19 07:41:07,413 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 792 transitions. [2023-11-19 07:41:07,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 792 transitions. [2023-11-19 07:41:07,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:07,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 792 transitions. [2023-11-19 07:41:07,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:07,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 385.0) internal successors, (1925), 5 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:07,426 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 385.0) internal successors, (1925), 5 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:07,426 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 247 flow. Second operand 4 states and 792 transitions. [2023-11-19 07:41:07,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 73 transitions, 374 flow [2023-11-19 07:41:07,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 73 transitions, 372 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:41:07,431 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 247 flow [2023-11-19 07:41:07,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=247, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2023-11-19 07:41:07,432 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -30 predicate places. [2023-11-19 07:41:07,432 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 247 flow [2023-11-19 07:41:07,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 187.8) internal successors, (939), 5 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:07,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:07,434 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] [2023-11-19 07:41:07,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:41:07,434 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-19 07:41:07,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:07,435 INFO L85 PathProgramCache]: Analyzing trace with hash 875476185, now seen corresponding path program 1 times [2023-11-19 07:41:07,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:07,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874047036] [2023-11-19 07:41:07,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:07,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:07,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:07,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874047036] [2023-11-19 07:41:07,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874047036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:07,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:07,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:41:07,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494689096] [2023-11-19 07:41:07,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:07,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:41:07,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:07,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:41:07,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:41:07,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 385 [2023-11-19 07:41:07,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 247 flow. Second operand has 4 states, 4 states have (on average 188.75) internal successors, (755), 4 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:07,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:07,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 385 [2023-11-19 07:41:07,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:08,184 INFO L124 PetriNetUnfolderBase]: 451/839 cut-off events. [2023-11-19 07:41:08,185 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2023-11-19 07:41:08,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1906 conditions, 839 events. 451/839 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2938 event pairs, 390 based on Foata normal form. 0/787 useless extension candidates. Maximal degree in co-relation 1900. Up to 690 conditions per place. [2023-11-19 07:41:08,188 INFO L140 encePairwiseOnDemand]: 378/385 looper letters, 50 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-11-19 07:41:08,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 69 transitions, 366 flow [2023-11-19 07:41:08,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:41:08,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:41:08,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 789 transitions. [2023-11-19 07:41:08,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123376623376623 [2023-11-19 07:41:08,193 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 789 transitions. [2023-11-19 07:41:08,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 789 transitions. [2023-11-19 07:41:08,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:08,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 789 transitions. [2023-11-19 07:41:08,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 197.25) internal successors, (789), 4 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:08,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 385.0) internal successors, (1925), 5 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:08,200 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 385.0) internal successors, (1925), 5 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:08,201 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 247 flow. Second operand 4 states and 789 transitions. [2023-11-19 07:41:08,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 69 transitions, 366 flow [2023-11-19 07:41:08,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 356 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:41:08,203 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 239 flow [2023-11-19 07:41:08,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2023-11-19 07:41:08,204 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -34 predicate places. [2023-11-19 07:41:08,205 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 239 flow [2023-11-19 07:41:08,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 188.75) internal successors, (755), 4 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:08,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:08,206 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, 1, 1, 1] [2023-11-19 07:41:08,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:41:08,206 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-19 07:41:08,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:08,207 INFO L85 PathProgramCache]: Analyzing trace with hash -449772070, now seen corresponding path program 1 times [2023-11-19 07:41:08,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:08,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299816734] [2023-11-19 07:41:08,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:08,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:09,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:09,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299816734] [2023-11-19 07:41:09,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299816734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:09,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:09,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-19 07:41:09,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676487025] [2023-11-19 07:41:09,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:09,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:41:09,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:09,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:41:09,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:41:11,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 385 [2023-11-19 07:41:11,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 239 flow. Second operand has 13 states, 13 states have (on average 165.30769230769232) internal successors, (2149), 13 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:11,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:11,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 385 [2023-11-19 07:41:11,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:11,719 INFO L124 PetriNetUnfolderBase]: 445/832 cut-off events. [2023-11-19 07:41:11,720 INFO L125 PetriNetUnfolderBase]: For 301/301 co-relation queries the response was YES. [2023-11-19 07:41:11,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1889 conditions, 832 events. 445/832 cut-off events. For 301/301 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2927 event pairs, 382 based on Foata normal form. 1/781 useless extension candidates. Maximal degree in co-relation 1883. Up to 671 conditions per place. [2023-11-19 07:41:11,725 INFO L140 encePairwiseOnDemand]: 372/385 looper letters, 49 selfloop transitions, 17 changer transitions 0/75 dead transitions. [2023-11-19 07:41:11,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 75 transitions, 411 flow [2023-11-19 07:41:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:41:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:41:11,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1526 transitions. [2023-11-19 07:41:11,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4404040404040404 [2023-11-19 07:41:11,734 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1526 transitions. [2023-11-19 07:41:11,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1526 transitions. [2023-11-19 07:41:11,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:11,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1526 transitions. [2023-11-19 07:41:11,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 169.55555555555554) internal successors, (1526), 9 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:11,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 385.0) internal successors, (3850), 10 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:11,755 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 385.0) internal successors, (3850), 10 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:11,756 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 239 flow. Second operand 9 states and 1526 transitions. [2023-11-19 07:41:11,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 75 transitions, 411 flow [2023-11-19 07:41:11,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 75 transitions, 401 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:41:11,760 INFO L231 Difference]: Finished difference. Result has 72 places, 67 transitions, 286 flow [2023-11-19 07:41:11,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=286, PETRI_PLACES=72, PETRI_TRANSITIONS=67} [2023-11-19 07:41:11,762 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -27 predicate places. [2023-11-19 07:41:11,763 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 67 transitions, 286 flow [2023-11-19 07:41:11,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 165.30769230769232) internal successors, (2149), 13 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:11,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:11,786 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, 1, 1, 1, 1] [2023-11-19 07:41:11,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:41:11,787 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-19 07:41:11,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:11,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1058034284, now seen corresponding path program 1 times [2023-11-19 07:41:11,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:11,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759696642] [2023-11-19 07:41:11,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:11,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:12,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:12,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759696642] [2023-11-19 07:41:12,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759696642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:12,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:12,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-19 07:41:12,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260233984] [2023-11-19 07:41:12,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:12,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:41:12,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:12,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:41:12,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:41:14,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 385 [2023-11-19 07:41:14,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 67 transitions, 286 flow. Second operand has 15 states, 15 states have (on average 165.26666666666668) internal successors, (2479), 15 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:14,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:14,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 385 [2023-11-19 07:41:14,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:14,788 INFO L124 PetriNetUnfolderBase]: 449/835 cut-off events. [2023-11-19 07:41:14,788 INFO L125 PetriNetUnfolderBase]: For 348/348 co-relation queries the response was YES. [2023-11-19 07:41:14,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1936 conditions, 835 events. 449/835 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2926 event pairs, 386 based on Foata normal form. 1/784 useless extension candidates. Maximal degree in co-relation 1929. Up to 682 conditions per place. [2023-11-19 07:41:14,792 INFO L140 encePairwiseOnDemand]: 372/385 looper letters, 50 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2023-11-19 07:41:14,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 76 transitions, 465 flow [2023-11-19 07:41:14,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:41:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:41:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1690 transitions. [2023-11-19 07:41:14,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43896103896103894 [2023-11-19 07:41:14,801 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1690 transitions. [2023-11-19 07:41:14,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1690 transitions. [2023-11-19 07:41:14,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:14,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1690 transitions. [2023-11-19 07:41:14,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:14,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 385.0) internal successors, (4235), 11 states have internal predecessors, (4235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:14,818 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 385.0) internal successors, (4235), 11 states have internal predecessors, (4235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:14,818 INFO L175 Difference]: Start difference. First operand has 72 places, 67 transitions, 286 flow. Second operand 10 states and 1690 transitions. [2023-11-19 07:41:14,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 76 transitions, 465 flow [2023-11-19 07:41:14,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 76 transitions, 444 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 07:41:14,822 INFO L231 Difference]: Finished difference. Result has 77 places, 68 transitions, 326 flow [2023-11-19 07:41:14,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=326, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2023-11-19 07:41:14,825 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -22 predicate places. [2023-11-19 07:41:14,825 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 326 flow [2023-11-19 07:41:14,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 165.26666666666668) internal successors, (2479), 15 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:14,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:14,826 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, 1, 1, 1, 1, 1] [2023-11-19 07:41:14,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 07:41:14,827 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-19 07:41:14,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:14,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1560673841, now seen corresponding path program 1 times [2023-11-19 07:41:14,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:14,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814162202] [2023-11-19 07:41:14,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:14,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:15,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:15,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814162202] [2023-11-19 07:41:15,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814162202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:15,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:15,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-19 07:41:15,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416803459] [2023-11-19 07:41:15,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:15,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:41:15,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:15,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:41:15,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:41:17,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 385 [2023-11-19 07:41:17,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 326 flow. Second operand has 15 states, 15 states have (on average 165.26666666666668) internal successors, (2479), 15 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:17,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:17,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 385 [2023-11-19 07:41:17,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:18,326 INFO L124 PetriNetUnfolderBase]: 464/849 cut-off events. [2023-11-19 07:41:18,326 INFO L125 PetriNetUnfolderBase]: For 387/387 co-relation queries the response was YES. [2023-11-19 07:41:18,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2008 conditions, 849 events. 464/849 cut-off events. For 387/387 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2935 event pairs, 401 based on Foata normal form. 1/798 useless extension candidates. Maximal degree in co-relation 1999. Up to 710 conditions per place. [2023-11-19 07:41:18,331 INFO L140 encePairwiseOnDemand]: 373/385 looper letters, 52 selfloop transitions, 17 changer transitions 0/76 dead transitions. [2023-11-19 07:41:18,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 76 transitions, 504 flow [2023-11-19 07:41:18,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:41:18,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:41:18,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1690 transitions. [2023-11-19 07:41:18,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43896103896103894 [2023-11-19 07:41:18,340 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1690 transitions. [2023-11-19 07:41:18,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1690 transitions. [2023-11-19 07:41:18,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:18,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1690 transitions. [2023-11-19 07:41:18,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:18,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 385.0) internal successors, (4235), 11 states have internal predecessors, (4235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:18,357 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 385.0) internal successors, (4235), 11 states have internal predecessors, (4235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:18,358 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 326 flow. Second operand 10 states and 1690 transitions. [2023-11-19 07:41:18,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 76 transitions, 504 flow [2023-11-19 07:41:18,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 76 transitions, 479 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-19 07:41:18,363 INFO L231 Difference]: Finished difference. Result has 81 places, 69 transitions, 362 flow [2023-11-19 07:41:18,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=362, PETRI_PLACES=81, PETRI_TRANSITIONS=69} [2023-11-19 07:41:18,365 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -18 predicate places. [2023-11-19 07:41:18,365 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 69 transitions, 362 flow [2023-11-19 07:41:18,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 165.26666666666668) internal successors, (2479), 15 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:18,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:18,367 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, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:18,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 07:41:18,368 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-19 07:41:18,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:18,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1136247774, now seen corresponding path program 1 times [2023-11-19 07:41:18,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:18,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809373586] [2023-11-19 07:41:18,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:18,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat