./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe028_power.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 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_e961b409-4c8d-49e5-b763-de97a73a3403/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e961b409-4c8d-49e5-b763-de97a73a3403/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e961b409-4c8d-49e5-b763-de97a73a3403/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e961b409-4c8d-49e5-b763-de97a73a3403/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe028_power.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e961b409-4c8d-49e5-b763-de97a73a3403/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e961b409-4c8d-49e5-b763-de97a73a3403/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d78821bc3a287b999f98be361d707254bd2fa61b63b525cf42d392168336d80 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:23:33,002 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:23:33,079 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e961b409-4c8d-49e5-b763-de97a73a3403/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:23:33,086 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:23:33,086 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:23:33,114 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:23:33,115 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:23:33,116 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:23:33,117 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:23:33,118 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:23:33,119 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:23:33,119 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:23:33,120 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:23:33,121 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:23:33,121 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:23:33,122 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:23:33,123 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:23:33,123 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:23:33,124 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:23:33,125 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:23:33,125 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:23:33,132 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:23:33,133 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:23:33,133 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:23:33,134 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:23:33,134 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:23:33,135 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:23:33,135 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:23:33,135 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:23:33,136 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:23:33,137 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:23:33,137 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:23:33,138 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:23:33,138 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:23:33,138 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:23:33,139 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:23:33,139 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:23:33,164 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:23:33,165 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_e961b409-4c8d-49e5-b763-de97a73a3403/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e961b409-4c8d-49e5-b763-de97a73a3403/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d78821bc3a287b999f98be361d707254bd2fa61b63b525cf42d392168336d80 [2023-11-12 02:23:33,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:23:33,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:23:33,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:23:33,519 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:23:33,520 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:23:33,521 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e961b409-4c8d-49e5-b763-de97a73a3403/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/pthread-wmm/safe028_power.i [2023-11-12 02:23:36,702 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:23:37,033 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:23:37,034 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e961b409-4c8d-49e5-b763-de97a73a3403/sv-benchmarks/c/pthread-wmm/safe028_power.i [2023-11-12 02:23:37,055 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e961b409-4c8d-49e5-b763-de97a73a3403/bin/uautomizer-verify-uTZkv6EMXl/data/711f43fe1/7435a4adca6d4f8aac07aeff420b4c41/FLAG719aaf201 [2023-11-12 02:23:37,074 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e961b409-4c8d-49e5-b763-de97a73a3403/bin/uautomizer-verify-uTZkv6EMXl/data/711f43fe1/7435a4adca6d4f8aac07aeff420b4c41 [2023-11-12 02:23:37,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:23:37,085 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:23:37,090 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:23:37,090 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:23:37,097 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:23:37,100 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:23:37" (1/1) ... [2023-11-12 02:23:37,102 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ad99138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:37, skipping insertion in model container [2023-11-12 02:23:37,102 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:23:37" (1/1) ... [2023-11-12 02:23:37,190 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:23:37,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:23:37,710 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:23:37,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:23:37,843 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:23:37,843 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:23:37,850 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:23:37,850 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:37 WrapperNode [2023-11-12 02:23:37,850 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:23:37,851 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:23:37,852 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:23:37,852 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:23:37,860 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:37" (1/1) ... [2023-11-12 02:23:37,905 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:37" (1/1) ... [2023-11-12 02:23:37,938 INFO L138 Inliner]: procedures = 176, calls = 78, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 183 [2023-11-12 02:23:37,938 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:23:37,939 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:23:37,939 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:23:37,940 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:23:37,948 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:37" (1/1) ... [2023-11-12 02:23:37,948 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:37" (1/1) ... [2023-11-12 02:23:37,954 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:37" (1/1) ... [2023-11-12 02:23:37,954 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:37" (1/1) ... [2023-11-12 02:23:37,971 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:37" (1/1) ... [2023-11-12 02:23:37,975 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:37" (1/1) ... [2023-11-12 02:23:37,979 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:37" (1/1) ... [2023-11-12 02:23:37,982 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:37" (1/1) ... [2023-11-12 02:23:37,987 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:23:37,988 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:23:37,988 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:23:37,989 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:23:37,989 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:37" (1/1) ... [2023-11-12 02:23:37,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:23:38,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e961b409-4c8d-49e5-b763-de97a73a3403/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:38,024 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e961b409-4c8d-49e5-b763-de97a73a3403/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:23:38,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e961b409-4c8d-49e5-b763-de97a73a3403/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:23:38,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:23:38,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:23:38,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:23:38,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:23:38,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:23:38,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:23:38,087 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-12 02:23:38,087 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-12 02:23:38,087 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-12 02:23:38,087 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-12 02:23:38,087 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-12 02:23:38,087 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-12 02:23:38,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:23:38,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:23:38,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:23:38,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:23:38,090 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:23:38,265 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:23:38,266 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:23:39,035 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:23:39,777 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:23:39,778 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 02:23:39,781 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:23:39 BoogieIcfgContainer [2023-11-12 02:23:39,781 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:23:39,785 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:23:39,786 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:23:39,789 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:23:39,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:23:37" (1/3) ... [2023-11-12 02:23:39,790 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f485e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:23:39, skipping insertion in model container [2023-11-12 02:23:39,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:37" (2/3) ... [2023-11-12 02:23:39,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f485e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:23:39, skipping insertion in model container [2023-11-12 02:23:39,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:23:39" (3/3) ... [2023-11-12 02:23:39,794 INFO L112 eAbstractionObserver]: Analyzing ICFG safe028_power.i [2023-11-12 02:23:39,815 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:23:39,815 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 51 error locations. [2023-11-12 02:23:39,816 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:23:40,052 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:23:40,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 185 transitions, 382 flow [2023-11-12 02:23:40,235 INFO L124 PetriNetUnfolderBase]: 3/182 cut-off events. [2023-11-12 02:23:40,236 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:23:40,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 182 events. 3/182 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 295 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 125. Up to 2 conditions per place. [2023-11-12 02:23:40,246 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 185 transitions, 382 flow [2023-11-12 02:23:40,259 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 182 transitions, 373 flow [2023-11-12 02:23:40,263 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:23:40,287 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 182 transitions, 373 flow [2023-11-12 02:23:40,291 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 182 transitions, 373 flow [2023-11-12 02:23:40,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 182 transitions, 373 flow [2023-11-12 02:23:40,388 INFO L124 PetriNetUnfolderBase]: 3/182 cut-off events. [2023-11-12 02:23:40,388 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:23:40,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 182 events. 3/182 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 296 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 125. Up to 2 conditions per place. [2023-11-12 02:23:40,398 INFO L119 LiptonReduction]: Number of co-enabled transitions 8072 [2023-11-12 02:23:57,522 INFO L134 LiptonReduction]: Checked pairs total: 41124 [2023-11-12 02:23:57,522 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-11-12 02:23:57,538 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:23:57,543 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;@299376e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:23:57,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 91 error locations. [2023-11-12 02:23:57,546 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:23:57,546 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-12 02:23:57,546 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:23:57,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:57,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-12 02:23:57,547 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-12 02:23:57,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:57,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1236, now seen corresponding path program 1 times [2023-11-12 02:23:57,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:57,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198006155] [2023-11-12 02:23:57,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:57,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:57,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:57,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198006155] [2023-11-12 02:23:57,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198006155] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:57,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:57,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-12 02:23:57,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529527750] [2023-11-12 02:23:57,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:57,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:23:57,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:57,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:23:57,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:23:57,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 346 [2023-11-12 02:23:57,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 77 transitions, 163 flow. Second operand has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:57,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:57,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 346 [2023-11-12 02:23:57,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:24:04,266 INFO L124 PetriNetUnfolderBase]: 20995/29330 cut-off events. [2023-11-12 02:24:04,266 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-12 02:24:04,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58733 conditions, 29330 events. 20995/29330 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 2261. Compared 191896 event pairs, 20995 based on Foata normal form. 0/12746 useless extension candidates. Maximal degree in co-relation 58722. Up to 29277 conditions per place. [2023-11-12 02:24:04,549 INFO L140 encePairwiseOnDemand]: 315/346 looper letters, 44 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-11-12 02:24:04,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 45 transitions, 187 flow [2023-11-12 02:24:04,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:24:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:24:04,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 331 transitions. [2023-11-12 02:24:04,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47832369942196534 [2023-11-12 02:24:04,574 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 331 transitions. [2023-11-12 02:24:04,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 331 transitions. [2023-11-12 02:24:04,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:24:04,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 331 transitions. [2023-11-12 02:24:04,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 165.5) internal successors, (331), 2 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:04,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 346.0) internal successors, (1038), 3 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:04,595 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 346.0) internal successors, (1038), 3 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:04,597 INFO L175 Difference]: Start difference. First operand has 86 places, 77 transitions, 163 flow. Second operand 2 states and 331 transitions. [2023-11-12 02:24:04,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 45 transitions, 187 flow [2023-11-12 02:24:04,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 45 transitions, 184 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:24:04,610 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 96 flow [2023-11-12 02:24:04,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=96, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2023-11-12 02:24:04,617 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -33 predicate places. [2023-11-12 02:24:04,618 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 96 flow [2023-11-12 02:24:04,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:04,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:24:04,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:24:04,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:24:04,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-12 02:24:04,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:04,632 INFO L85 PathProgramCache]: Analyzing trace with hash 37918358, now seen corresponding path program 1 times [2023-11-12 02:24:04,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:04,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728986783] [2023-11-12 02:24:04,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:04,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:24:05,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:05,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728986783] [2023-11-12 02:24:05,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728986783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:24:05,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:24:05,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:24:05,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581385908] [2023-11-12 02:24:05,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:24:05,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:24:05,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:05,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:24:05,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:24:05,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 346 [2023-11-12 02:24:05,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:05,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:24:05,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 346 [2023-11-12 02:24:05,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:24:08,669 INFO L124 PetriNetUnfolderBase]: 13587/19924 cut-off events. [2023-11-12 02:24:08,669 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:24:08,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39682 conditions, 19924 events. 13587/19924 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1308. Compared 131559 event pairs, 8543 based on Foata normal form. 0/10872 useless extension candidates. Maximal degree in co-relation 39679. Up to 11976 conditions per place. [2023-11-12 02:24:08,832 INFO L140 encePairwiseOnDemand]: 329/346 looper letters, 52 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2023-11-12 02:24:08,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 62 transitions, 252 flow [2023-11-12 02:24:08,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:24:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:24:08,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2023-11-12 02:24:08,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42485549132947975 [2023-11-12 02:24:08,996 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2023-11-12 02:24:08,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2023-11-12 02:24:08,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:24:08,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2023-11-12 02:24:08,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:09,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:09,007 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:09,010 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 96 flow. Second operand 3 states and 441 transitions. [2023-11-12 02:24:09,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 62 transitions, 252 flow [2023-11-12 02:24:09,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 62 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:24:09,015 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 168 flow [2023-11-12 02:24:09,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-11-12 02:24:09,017 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -31 predicate places. [2023-11-12 02:24:09,018 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 168 flow [2023-11-12 02:24:09,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:09,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:24:09,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:24:09,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:24:09,026 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-12 02:24:09,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:09,029 INFO L85 PathProgramCache]: Analyzing trace with hash 37918359, now seen corresponding path program 1 times [2023-11-12 02:24:09,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:09,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721061078] [2023-11-12 02:24:09,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:09,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:24:09,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:09,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721061078] [2023-11-12 02:24:09,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721061078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:24:09,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:24:09,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:24:09,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260604274] [2023-11-12 02:24:09,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:24:09,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:24:09,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:09,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:24:09,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:24:09,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 346 [2023-11-12 02:24:09,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:09,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:24:09,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 346 [2023-11-12 02:24:09,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:24:11,377 INFO L124 PetriNetUnfolderBase]: 4629/7162 cut-off events. [2023-11-12 02:24:11,377 INFO L125 PetriNetUnfolderBase]: For 1924/1924 co-relation queries the response was YES. [2023-11-12 02:24:11,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19324 conditions, 7162 events. 4629/7162 cut-off events. For 1924/1924 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 43438 event pairs, 3646 based on Foata normal form. 1586/7422 useless extension candidates. Maximal degree in co-relation 19319. Up to 6982 conditions per place. [2023-11-12 02:24:11,439 INFO L140 encePairwiseOnDemand]: 337/346 looper letters, 40 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-11-12 02:24:11,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 42 transitions, 234 flow [2023-11-12 02:24:11,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:24:11,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:24:11,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2023-11-12 02:24:11,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.407514450867052 [2023-11-12 02:24:11,445 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 423 transitions. [2023-11-12 02:24:11,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 423 transitions. [2023-11-12 02:24:11,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:24:11,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 423 transitions. [2023-11-12 02:24:11,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:11,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:11,455 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:11,455 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 168 flow. Second operand 3 states and 423 transitions. [2023-11-12 02:24:11,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 42 transitions, 234 flow [2023-11-12 02:24:11,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 216 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:24:11,484 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 136 flow [2023-11-12 02:24:11,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-11-12 02:24:11,486 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -39 predicate places. [2023-11-12 02:24:11,486 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 136 flow [2023-11-12 02:24:11,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:11,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:24:11,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 02:24:11,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:24:11,494 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting P1Err0ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-12 02:24:11,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:11,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2080471480, now seen corresponding path program 1 times [2023-11-12 02:24:11,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:11,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318169939] [2023-11-12 02:24:11,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:11,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:24:11,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:11,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318169939] [2023-11-12 02:24:11,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318169939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:24:11,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:24:11,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:24:11,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227074751] [2023-11-12 02:24:11,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:24:11,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:24:11,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:11,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:24:11,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:24:11,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 346 [2023-11-12 02:24:11,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:11,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:24:11,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 346 [2023-11-12 02:24:11,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:24:13,081 INFO L124 PetriNetUnfolderBase]: 3822/5887 cut-off events. [2023-11-12 02:24:13,081 INFO L125 PetriNetUnfolderBase]: For 804/804 co-relation queries the response was YES. [2023-11-12 02:24:13,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15154 conditions, 5887 events. 3822/5887 cut-off events. For 804/804 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 35564 event pairs, 924 based on Foata normal form. 0/4511 useless extension candidates. Maximal degree in co-relation 15149. Up to 4990 conditions per place. [2023-11-12 02:24:13,123 INFO L140 encePairwiseOnDemand]: 343/346 looper letters, 67 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-11-12 02:24:13,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 70 transitions, 366 flow [2023-11-12 02:24:13,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:24:13,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:24:13,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 438 transitions. [2023-11-12 02:24:13,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42196531791907516 [2023-11-12 02:24:13,127 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 438 transitions. [2023-11-12 02:24:13,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 438 transitions. [2023-11-12 02:24:13,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:24:13,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 438 transitions. [2023-11-12 02:24:13,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:13,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:13,135 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:13,135 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 136 flow. Second operand 3 states and 438 transitions. [2023-11-12 02:24:13,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 70 transitions, 366 flow [2023-11-12 02:24:13,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 70 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:24:13,139 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 137 flow [2023-11-12 02:24:13,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2023-11-12 02:24:13,140 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -39 predicate places. [2023-11-12 02:24:13,140 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 137 flow [2023-11-12 02:24:13,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:13,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:24:13,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:13,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:24:13,142 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-12 02:24:13,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:13,143 INFO L85 PathProgramCache]: Analyzing trace with hash 405690251, now seen corresponding path program 1 times [2023-11-12 02:24:13,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:13,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028838552] [2023-11-12 02:24:13,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:13,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:24:13,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:13,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028838552] [2023-11-12 02:24:13,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028838552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:24:13,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:24:13,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:24:13,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141061332] [2023-11-12 02:24:13,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:24:13,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:24:13,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:13,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:24:13,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:24:13,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 346 [2023-11-12 02:24:13,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:13,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:24:13,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 346 [2023-11-12 02:24:13,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:24:14,586 INFO L124 PetriNetUnfolderBase]: 3742/5907 cut-off events. [2023-11-12 02:24:14,587 INFO L125 PetriNetUnfolderBase]: For 1047/1047 co-relation queries the response was YES. [2023-11-12 02:24:14,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15363 conditions, 5907 events. 3742/5907 cut-off events. For 1047/1047 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 36033 event pairs, 1272 based on Foata normal form. 0/4567 useless extension candidates. Maximal degree in co-relation 15358. Up to 4413 conditions per place. [2023-11-12 02:24:14,626 INFO L140 encePairwiseOnDemand]: 342/346 looper letters, 59 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2023-11-12 02:24:14,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 63 transitions, 335 flow [2023-11-12 02:24:14,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:24:14,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:24:14,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-11-12 02:24:14,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41714836223506746 [2023-11-12 02:24:14,629 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-11-12 02:24:14,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-11-12 02:24:14,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:24:14,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-11-12 02:24:14,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:14,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:14,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:14,636 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 137 flow. Second operand 3 states and 433 transitions. [2023-11-12 02:24:14,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 63 transitions, 335 flow [2023-11-12 02:24:14,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 63 transitions, 329 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:24:14,639 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 146 flow [2023-11-12 02:24:14,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2023-11-12 02:24:14,641 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -38 predicate places. [2023-11-12 02:24:14,641 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 146 flow [2023-11-12 02:24:14,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:14,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:24:14,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:14,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:24:14,642 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-12 02:24:14,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:14,643 INFO L85 PathProgramCache]: Analyzing trace with hash 405690624, now seen corresponding path program 1 times [2023-11-12 02:24:14,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:14,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241528861] [2023-11-12 02:24:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:14,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:24:15,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:15,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241528861] [2023-11-12 02:24:15,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241528861] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:24:15,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:24:15,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:24:15,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286425411] [2023-11-12 02:24:15,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:24:15,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:24:15,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:15,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:24:15,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:24:15,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 346 [2023-11-12 02:24:15,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:15,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:24:15,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 346 [2023-11-12 02:24:15,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:24:15,957 INFO L124 PetriNetUnfolderBase]: 3702/5835 cut-off events. [2023-11-12 02:24:15,957 INFO L125 PetriNetUnfolderBase]: For 1071/1071 co-relation queries the response was YES. [2023-11-12 02:24:15,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15472 conditions, 5835 events. 3702/5835 cut-off events. For 1071/1071 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 35492 event pairs, 1280 based on Foata normal form. 0/4679 useless extension candidates. Maximal degree in co-relation 15466. Up to 4397 conditions per place. [2023-11-12 02:24:15,998 INFO L140 encePairwiseOnDemand]: 343/346 looper letters, 58 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2023-11-12 02:24:15,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 338 flow [2023-11-12 02:24:15,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:24:15,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:24:16,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2023-11-12 02:24:16,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41811175337186895 [2023-11-12 02:24:16,002 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2023-11-12 02:24:16,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2023-11-12 02:24:16,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:24:16,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2023-11-12 02:24:16,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:16,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:16,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:16,010 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 146 flow. Second operand 3 states and 434 transitions. [2023-11-12 02:24:16,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 338 flow [2023-11-12 02:24:16,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 62 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:24:16,015 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 151 flow [2023-11-12 02:24:16,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2023-11-12 02:24:16,016 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -37 predicate places. [2023-11-12 02:24:16,016 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 151 flow [2023-11-12 02:24:16,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:16,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:24:16,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:16,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:24:16,018 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-12 02:24:16,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:16,019 INFO L85 PathProgramCache]: Analyzing trace with hash -308494235, now seen corresponding path program 1 times [2023-11-12 02:24:16,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:16,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127082999] [2023-11-12 02:24:16,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:16,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:24:16,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:16,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127082999] [2023-11-12 02:24:16,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127082999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:24:16,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:24:16,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:24:16,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250000147] [2023-11-12 02:24:16,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:24:16,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:24:16,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:16,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:24:16,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:24:16,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 346 [2023-11-12 02:24:16,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 151 flow. Second operand has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:16,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:24:16,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 346 [2023-11-12 02:24:16,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:24:17,566 INFO L124 PetriNetUnfolderBase]: 4052/6449 cut-off events. [2023-11-12 02:24:17,566 INFO L125 PetriNetUnfolderBase]: For 1229/1229 co-relation queries the response was YES. [2023-11-12 02:24:17,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17327 conditions, 6449 events. 4052/6449 cut-off events. For 1229/1229 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 40315 event pairs, 1312 based on Foata normal form. 0/5311 useless extension candidates. Maximal degree in co-relation 17320. Up to 2959 conditions per place. [2023-11-12 02:24:17,605 INFO L140 encePairwiseOnDemand]: 336/346 looper letters, 45 selfloop transitions, 14 changer transitions 0/60 dead transitions. [2023-11-12 02:24:17,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 60 transitions, 319 flow [2023-11-12 02:24:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:24:17,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:24:17,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 552 transitions. [2023-11-12 02:24:17,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3988439306358382 [2023-11-12 02:24:17,609 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 552 transitions. [2023-11-12 02:24:17,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 552 transitions. [2023-11-12 02:24:17,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:24:17,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 552 transitions. [2023-11-12 02:24:17,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:17,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 346.0) internal successors, (1730), 5 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:17,618 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 346.0) internal successors, (1730), 5 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:17,619 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 151 flow. Second operand 4 states and 552 transitions. [2023-11-12 02:24:17,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 60 transitions, 319 flow [2023-11-12 02:24:17,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 60 transitions, 313 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:24:17,624 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 185 flow [2023-11-12 02:24:17,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=185, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2023-11-12 02:24:17,625 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -37 predicate places. [2023-11-12 02:24:17,625 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 185 flow [2023-11-12 02:24:17,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:17,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:24:17,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:17,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:24:17,626 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-12 02:24:17,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:17,627 INFO L85 PathProgramCache]: Analyzing trace with hash -308494234, now seen corresponding path program 1 times [2023-11-12 02:24:17,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:17,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867817768] [2023-11-12 02:24:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:17,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:24:17,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:17,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867817768] [2023-11-12 02:24:17,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867817768] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:24:17,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:24:17,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:24:17,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958009301] [2023-11-12 02:24:17,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:24:17,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:24:17,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:17,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:24:17,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:24:18,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 346 [2023-11-12 02:24:18,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 185 flow. Second operand has 5 states, 5 states have (on average 128.4) internal successors, (642), 5 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:18,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:24:18,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 346 [2023-11-12 02:24:18,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:24:19,240 INFO L124 PetriNetUnfolderBase]: 3948/6297 cut-off events. [2023-11-12 02:24:19,240 INFO L125 PetriNetUnfolderBase]: For 2061/2061 co-relation queries the response was YES. [2023-11-12 02:24:19,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18147 conditions, 6297 events. 3948/6297 cut-off events. For 2061/2061 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 39436 event pairs, 1216 based on Foata normal form. 48/5635 useless extension candidates. Maximal degree in co-relation 18140. Up to 4858 conditions per place. [2023-11-12 02:24:19,282 INFO L140 encePairwiseOnDemand]: 343/346 looper letters, 59 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2023-11-12 02:24:19,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 63 transitions, 381 flow [2023-11-12 02:24:19,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:24:19,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:24:19,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 552 transitions. [2023-11-12 02:24:19,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3988439306358382 [2023-11-12 02:24:19,287 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 552 transitions. [2023-11-12 02:24:19,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 552 transitions. [2023-11-12 02:24:19,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:24:19,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 552 transitions. [2023-11-12 02:24:19,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:19,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 346.0) internal successors, (1730), 5 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:19,295 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 346.0) internal successors, (1730), 5 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:19,295 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 185 flow. Second operand 4 states and 552 transitions. [2023-11-12 02:24:19,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 63 transitions, 381 flow [2023-11-12 02:24:19,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 63 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:24:19,311 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 171 flow [2023-11-12 02:24:19,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=171, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-11-12 02:24:19,314 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -37 predicate places. [2023-11-12 02:24:19,314 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 171 flow [2023-11-12 02:24:19,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.4) internal successors, (642), 5 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:19,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:24:19,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:19,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:24:19,316 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2023-11-12 02:24:19,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:19,316 INFO L85 PathProgramCache]: Analyzing trace with hash -308493862, now seen corresponding path program 1 times [2023-11-12 02:24:19,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:19,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546603813] [2023-11-12 02:24:19,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:19,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat