./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe015_power.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a536b350-95d1-4a56-b038-6c9381379a49/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a536b350-95d1-4a56-b038-6c9381379a49/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a536b350-95d1-4a56-b038-6c9381379a49/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a536b350-95d1-4a56-b038-6c9381379a49/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe015_power.opt.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a536b350-95d1-4a56-b038-6c9381379a49/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a536b350-95d1-4a56-b038-6c9381379a49/bin/uautomizer-verify-VRDe98Ueme --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 7ed03bf56a68b0ba240fc33c794b8871860875fa75320178f23c03b98fa54cab --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:42:37,754 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:42:37,893 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a536b350-95d1-4a56-b038-6c9381379a49/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 10:42:37,902 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:42:37,903 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:42:37,951 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:42:37,952 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:42:37,952 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:42:37,953 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:42:37,959 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:42:37,960 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:42:37,961 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:42:37,962 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:42:37,964 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:42:37,965 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:42:37,965 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:42:37,966 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:42:37,967 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:42:37,967 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:42:37,968 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:42:37,968 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 10:42:37,969 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 10:42:37,969 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 10:42:37,970 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:42:37,970 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:42:37,971 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:42:37,971 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:42:37,971 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:42:37,972 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:42:37,973 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:42:37,974 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:42:37,975 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:42:37,975 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:42:37,975 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:42:37,976 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:42:37,976 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:42:37,976 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:42:37,976 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:42:37,977 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:42:37,977 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:42:37,977 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:42:37,978 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_a536b350-95d1-4a56-b038-6c9381379a49/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a536b350-95d1-4a56-b038-6c9381379a49/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ed03bf56a68b0ba240fc33c794b8871860875fa75320178f23c03b98fa54cab [2023-11-26 10:42:38,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:42:38,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:42:38,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:42:38,413 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:42:38,413 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:42:38,415 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a536b350-95d1-4a56-b038-6c9381379a49/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/pthread-wmm/safe015_power.opt.i [2023-11-26 10:42:41,690 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:42:42,048 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:42:42,075 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a536b350-95d1-4a56-b038-6c9381379a49/sv-benchmarks/c/pthread-wmm/safe015_power.opt.i [2023-11-26 10:42:42,102 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a536b350-95d1-4a56-b038-6c9381379a49/bin/uautomizer-verify-VRDe98Ueme/data/5336750cf/ba3cb2556513449dbdcc993a7757dc3b/FLAG6970c1841 [2023-11-26 10:42:42,120 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a536b350-95d1-4a56-b038-6c9381379a49/bin/uautomizer-verify-VRDe98Ueme/data/5336750cf/ba3cb2556513449dbdcc993a7757dc3b [2023-11-26 10:42:42,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:42:42,128 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:42:42,131 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:42:42,131 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:42:42,136 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:42:42,137 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,138 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fe24cc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42, skipping insertion in model container [2023-11-26 10:42:42,138 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,213 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:42:42,809 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:42:42,829 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:42:42,895 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:42:42,937 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:42:42,938 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:42:42,946 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:42:42,946 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42 WrapperNode [2023-11-26 10:42:42,946 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:42:42,948 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:42:42,948 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:42:42,948 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:42:42,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,994 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:43,052 INFO L138 Inliner]: procedures = 176, calls = 87, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 171 [2023-11-26 10:42:43,054 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:42:43,055 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:42:43,055 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:42:43,055 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:42:43,093 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:43,094 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:43,110 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:43,157 INFO L175 MemorySlicer]: Split 35 memory accesses to 5 slices as follows [2, 30, 1, 1, 1]. 86 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0, 0, 0]. The 14 writes are split as follows [0, 11, 1, 1, 1]. [2023-11-26 10:42:43,179 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:43,179 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:43,204 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:43,220 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:43,224 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:43,236 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:43,242 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:42:43,245 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:42:43,246 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:42:43,247 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:42:43,248 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:43,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:42:43,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a536b350-95d1-4a56-b038-6c9381379a49/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:43,284 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a536b350-95d1-4a56-b038-6c9381379a49/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:42:43,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a536b350-95d1-4a56-b038-6c9381379a49/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:42:43,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:42:43,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:42:43,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:42:43,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:42:43,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 10:42:43,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:42:43,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:42:43,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:42:43,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:42:43,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 10:42:43,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 10:42:43,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:42:43,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:42:43,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:42:43,343 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-26 10:42:43,344 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-26 10:42:43,344 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-26 10:42:43,344 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-26 10:42:43,344 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-26 10:42:43,345 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-26 10:42:43,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:42:43,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:42:43,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:42:43,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:42:43,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 10:42:43,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 10:42:43,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:42:43,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:42:43,352 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 10:42:43,536 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:42:43,538 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:42:44,315 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:42:45,439 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:42:45,439 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-26 10:42:45,440 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:42:45 BoogieIcfgContainer [2023-11-26 10:42:45,440 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:42:45,443 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:42:45,443 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:42:45,447 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:42:45,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:42:42" (1/3) ... [2023-11-26 10:42:45,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bb958d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:42:45, skipping insertion in model container [2023-11-26 10:42:45,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (2/3) ... [2023-11-26 10:42:45,451 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bb958d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:42:45, skipping insertion in model container [2023-11-26 10:42:45,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:42:45" (3/3) ... [2023-11-26 10:42:45,452 INFO L112 eAbstractionObserver]: Analyzing ICFG safe015_power.opt.i [2023-11-26 10:42:45,475 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:42:45,476 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 66 error locations. [2023-11-26 10:42:45,476 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:42:45,666 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-26 10:42:45,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 111 transitions, 234 flow [2023-11-26 10:42:45,860 INFO L124 PetriNetUnfolderBase]: 2/108 cut-off events. [2023-11-26 10:42:45,860 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:42:45,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 108 events. 2/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 472 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-11-26 10:42:45,868 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 111 transitions, 234 flow [2023-11-26 10:42:45,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 108 transitions, 225 flow [2023-11-26 10:42:45,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:42:45,906 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;@5bec81c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:42:45,906 INFO L358 AbstractCegarLoop]: Starting to check reachability of 109 error locations. [2023-11-26 10:42:45,912 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:42:45,912 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-26 10:42:45,912 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:42:45,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:45,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 10:42:45,914 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-26 10:42:45,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:45,920 INFO L85 PathProgramCache]: Analyzing trace with hash 33570, now seen corresponding path program 1 times [2023-11-26 10:42:45,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:45,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14051926] [2023-11-26 10:42:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:45,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:46,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:46,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14051926] [2023-11-26 10:42:46,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14051926] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:46,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:46,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:42:46,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502133809] [2023-11-26 10:42:46,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:46,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:46,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:46,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:46,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:46,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 111 [2023-11-26 10:42:46,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 108 transitions, 225 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:46,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:46,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 111 [2023-11-26 10:42:46,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:56,848 INFO L124 PetriNetUnfolderBase]: 28568/43016 cut-off events. [2023-11-26 10:42:56,849 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-11-26 10:42:56,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82923 conditions, 43016 events. 28568/43016 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 4308. Compared 395004 event pairs, 25158 based on Foata normal form. 1300/20718 useless extension candidates. Maximal degree in co-relation 82909. Up to 35050 conditions per place. [2023-11-26 10:42:57,286 INFO L140 encePairwiseOnDemand]: 72/111 looper letters, 71 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-11-26 10:42:57,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 95 transitions, 345 flow [2023-11-26 10:42:57,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:57,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:42:57,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 209 transitions. [2023-11-26 10:42:57,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276276276276276 [2023-11-26 10:42:57,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 209 transitions. [2023-11-26 10:42:57,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 209 transitions. [2023-11-26 10:42:57,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:57,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 209 transitions. [2023-11-26 10:42:57,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:57,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:57,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:57,332 INFO L175 Difference]: Start difference. First operand has 116 places, 108 transitions, 225 flow. Second operand 3 states and 209 transitions. [2023-11-26 10:42:57,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 95 transitions, 345 flow [2023-11-26 10:42:57,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 95 transitions, 342 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 10:42:57,347 INFO L231 Difference]: Finished difference. Result has 79 places, 70 transitions, 150 flow [2023-11-26 10:42:57,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=79, PETRI_TRANSITIONS=70} [2023-11-26 10:42:57,355 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -37 predicate places. [2023-11-26 10:42:57,355 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 70 transitions, 150 flow [2023-11-26 10:42:57,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:57,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:57,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 10:42:57,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:42:57,357 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-26 10:42:57,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:57,358 INFO L85 PathProgramCache]: Analyzing trace with hash 33571, now seen corresponding path program 1 times [2023-11-26 10:42:57,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:57,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388619789] [2023-11-26 10:42:57,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:57,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:57,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:57,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388619789] [2023-11-26 10:42:57,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388619789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:57,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:57,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:42:57,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709118195] [2023-11-26 10:42:57,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:57,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:57,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:57,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:57,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:57,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 111 [2023-11-26 10:42:57,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 70 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:57,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:57,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 111 [2023-11-26 10:42:57,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:05,514 INFO L124 PetriNetUnfolderBase]: 28568/43015 cut-off events. [2023-11-26 10:43:05,514 INFO L125 PetriNetUnfolderBase]: For 650/650 co-relation queries the response was YES. [2023-11-26 10:43:05,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83570 conditions, 43015 events. 28568/43015 cut-off events. For 650/650 co-relation queries the response was YES. Maximal size of possible extension queue 4308. Compared 395051 event pairs, 25158 based on Foata normal form. 1/19418 useless extension candidates. Maximal degree in co-relation 83559. Up to 35049 conditions per place. [2023-11-26 10:43:05,842 INFO L140 encePairwiseOnDemand]: 108/111 looper letters, 70 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-11-26 10:43:05,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 94 transitions, 342 flow [2023-11-26 10:43:05,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:43:05,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:43:05,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2023-11-26 10:43:05,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45345345345345345 [2023-11-26 10:43:05,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 151 transitions. [2023-11-26 10:43:05,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 151 transitions. [2023-11-26 10:43:05,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:05,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 151 transitions. [2023-11-26 10:43:05,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:05,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:05,859 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:05,860 INFO L175 Difference]: Start difference. First operand has 79 places, 70 transitions, 150 flow. Second operand 3 states and 151 transitions. [2023-11-26 10:43:05,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 94 transitions, 342 flow [2023-11-26 10:43:06,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 94 transitions, 338 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:43:06,134 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 148 flow [2023-11-26 10:43:06,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2023-11-26 10:43:06,136 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -38 predicate places. [2023-11-26 10:43:06,136 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 148 flow [2023-11-26 10:43:06,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:06,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:06,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 10:43:06,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:43:06,137 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-26 10:43:06,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:06,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1001195366, now seen corresponding path program 1 times [2023-11-26 10:43:06,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:06,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148049815] [2023-11-26 10:43:06,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:06,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:06,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:06,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148049815] [2023-11-26 10:43:06,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148049815] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:06,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:06,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:43:06,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279471574] [2023-11-26 10:43:06,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:06,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:43:06,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:06,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:43:06,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:43:06,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 111 [2023-11-26 10:43:06,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:06,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:06,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 111 [2023-11-26 10:43:06,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:13,688 INFO L124 PetriNetUnfolderBase]: 28568/43010 cut-off events. [2023-11-26 10:43:13,689 INFO L125 PetriNetUnfolderBase]: For 650/650 co-relation queries the response was YES. [2023-11-26 10:43:13,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83565 conditions, 43010 events. 28568/43010 cut-off events. For 650/650 co-relation queries the response was YES. Maximal size of possible extension queue 4308. Compared 392565 event pairs, 18290 based on Foata normal form. 5/19424 useless extension candidates. Maximal degree in co-relation 83554. Up to 35043 conditions per place. [2023-11-26 10:43:14,002 INFO L140 encePairwiseOnDemand]: 108/111 looper letters, 70 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-11-26 10:43:14,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 340 flow [2023-11-26 10:43:14,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:43:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:43:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2023-11-26 10:43:14,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45345345345345345 [2023-11-26 10:43:14,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 151 transitions. [2023-11-26 10:43:14,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 151 transitions. [2023-11-26 10:43:14,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:14,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 151 transitions. [2023-11-26 10:43:14,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:14,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:14,013 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:14,013 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 148 flow. Second operand 3 states and 151 transitions. [2023-11-26 10:43:14,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 340 flow [2023-11-26 10:43:14,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 93 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:43:14,437 INFO L231 Difference]: Finished difference. Result has 77 places, 68 transitions, 146 flow [2023-11-26 10:43:14,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2023-11-26 10:43:14,440 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -39 predicate places. [2023-11-26 10:43:14,440 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 146 flow [2023-11-26 10:43:14,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:14,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:14,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 10:43:14,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:43:14,441 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-26 10:43:14,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:14,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1001195365, now seen corresponding path program 1 times [2023-11-26 10:43:14,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:14,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359445529] [2023-11-26 10:43:14,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:14,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:14,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:14,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359445529] [2023-11-26 10:43:14,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359445529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:14,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:14,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:43:14,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433747406] [2023-11-26 10:43:14,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:14,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:43:14,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:14,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:43:14,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:43:14,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 111 [2023-11-26 10:43:14,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:14,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:14,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 111 [2023-11-26 10:43:14,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:21,725 INFO L124 PetriNetUnfolderBase]: 28572/42881 cut-off events. [2023-11-26 10:43:21,725 INFO L125 PetriNetUnfolderBase]: For 654/654 co-relation queries the response was YES. [2023-11-26 10:43:21,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83449 conditions, 42881 events. 28572/42881 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 4308. Compared 391891 event pairs, 25288 based on Foata normal form. 0/19290 useless extension candidates. Maximal degree in co-relation 83439. Up to 35052 conditions per place. [2023-11-26 10:43:22,065 INFO L140 encePairwiseOnDemand]: 108/111 looper letters, 71 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-11-26 10:43:22,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 340 flow [2023-11-26 10:43:22,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:43:22,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:43:22,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2023-11-26 10:43:22,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44744744744744747 [2023-11-26 10:43:22,068 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 149 transitions. [2023-11-26 10:43:22,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 149 transitions. [2023-11-26 10:43:22,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:22,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 149 transitions. [2023-11-26 10:43:22,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:22,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:22,079 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:22,080 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 146 flow. Second operand 3 states and 149 transitions. [2023-11-26 10:43:22,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 340 flow [2023-11-26 10:43:22,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:43:22,177 INFO L231 Difference]: Finished difference. Result has 76 places, 67 transitions, 144 flow [2023-11-26 10:43:22,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=76, PETRI_TRANSITIONS=67} [2023-11-26 10:43:22,178 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -40 predicate places. [2023-11-26 10:43:22,179 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 67 transitions, 144 flow [2023-11-26 10:43:22,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:22,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:22,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:22,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:43:22,180 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-26 10:43:22,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:22,181 INFO L85 PathProgramCache]: Analyzing trace with hash 76747393, now seen corresponding path program 1 times [2023-11-26 10:43:22,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:22,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145692660] [2023-11-26 10:43:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:22,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:22,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:22,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145692660] [2023-11-26 10:43:22,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145692660] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:22,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:22,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:43:22,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891825154] [2023-11-26 10:43:22,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:22,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:43:22,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:22,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:43:22,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:43:22,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 111 [2023-11-26 10:43:22,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 67 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:22,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:22,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 111 [2023-11-26 10:43:22,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:26,556 INFO L124 PetriNetUnfolderBase]: 11981/19262 cut-off events. [2023-11-26 10:43:26,556 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2023-11-26 10:43:26,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37110 conditions, 19262 events. 11981/19262 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 1665. Compared 170861 event pairs, 8073 based on Foata normal form. 0/11356 useless extension candidates. Maximal degree in co-relation 37099. Up to 10527 conditions per place. [2023-11-26 10:43:26,692 INFO L140 encePairwiseOnDemand]: 92/111 looper letters, 72 selfloop transitions, 8 changer transitions 0/99 dead transitions. [2023-11-26 10:43:26,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 99 transitions, 368 flow [2023-11-26 10:43:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:43:26,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:43:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 203 transitions. [2023-11-26 10:43:26,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4572072072072072 [2023-11-26 10:43:26,695 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 203 transitions. [2023-11-26 10:43:26,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 203 transitions. [2023-11-26 10:43:26,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:26,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 203 transitions. [2023-11-26 10:43:26,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:26,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:26,700 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:26,700 INFO L175 Difference]: Start difference. First operand has 76 places, 67 transitions, 144 flow. Second operand 4 states and 203 transitions. [2023-11-26 10:43:26,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 99 transitions, 368 flow [2023-11-26 10:43:26,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 99 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:43:26,710 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 222 flow [2023-11-26 10:43:26,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2023-11-26 10:43:26,711 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -39 predicate places. [2023-11-26 10:43:26,712 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 222 flow [2023-11-26 10:43:26,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:26,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:26,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:26,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:43:26,713 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-26 10:43:26,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:26,714 INFO L85 PathProgramCache]: Analyzing trace with hash 76747394, now seen corresponding path program 1 times [2023-11-26 10:43:26,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:26,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202357846] [2023-11-26 10:43:26,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:26,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:26,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:26,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202357846] [2023-11-26 10:43:26,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202357846] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:26,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:26,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:43:26,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513484786] [2023-11-26 10:43:26,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:26,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:43:26,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:26,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:43:26,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:43:26,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 111 [2023-11-26 10:43:26,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:26,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:26,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 111 [2023-11-26 10:43:26,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand