./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/rfi006_rmo.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff 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_9809a473-7b84-4833-9190-c88bcbde063a/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9809a473-7b84-4833-9190-c88bcbde063a/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9809a473-7b84-4833-9190-c88bcbde063a/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9809a473-7b84-4833-9190-c88bcbde063a/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/rfi006_rmo.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9809a473-7b84-4833-9190-c88bcbde063a/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9809a473-7b84-4833-9190-c88bcbde063a/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 304137b4cdfcb1cb721c511de7faa38271d71a9e3815c7f79977f44461721381 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:54:07,900 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:54:08,012 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9809a473-7b84-4833-9190-c88bcbde063a/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:54:08,016 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:54:08,017 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:54:08,057 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:54:08,059 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:54:08,060 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:54:08,061 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:54:08,065 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:54:08,066 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:54:08,067 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:54:08,067 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:54:08,069 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:54:08,069 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:54:08,070 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:54:08,070 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:54:08,071 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:54:08,071 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:54:08,072 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:54:08,072 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:54:08,073 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:54:08,073 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:54:08,074 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:54:08,074 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:54:08,075 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:54:08,075 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:54:08,076 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:54:08,076 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:54:08,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:54:08,078 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:54:08,078 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:54:08,079 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:54:08,079 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:54:08,079 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:54:08,079 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:54:08,080 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:54:08,080 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:54:08,080 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_9809a473-7b84-4833-9190-c88bcbde063a/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9809a473-7b84-4833-9190-c88bcbde063a/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 304137b4cdfcb1cb721c511de7faa38271d71a9e3815c7f79977f44461721381 [2023-11-19 07:54:08,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:54:08,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:54:08,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:54:08,439 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:54:08,440 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:54:08,442 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9809a473-7b84-4833-9190-c88bcbde063a/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-wmm/rfi006_rmo.i [2023-11-19 07:54:11,727 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:54:12,099 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:54:12,100 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9809a473-7b84-4833-9190-c88bcbde063a/sv-benchmarks/c/pthread-wmm/rfi006_rmo.i [2023-11-19 07:54:12,127 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9809a473-7b84-4833-9190-c88bcbde063a/bin/uautomizer-verify-uCwYo4JHxu/data/ba7f773d2/f8131ef147b04b3b8aec1b14cbce526f/FLAG948360c9f [2023-11-19 07:54:12,145 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9809a473-7b84-4833-9190-c88bcbde063a/bin/uautomizer-verify-uCwYo4JHxu/data/ba7f773d2/f8131ef147b04b3b8aec1b14cbce526f [2023-11-19 07:54:12,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:54:12,149 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:54:12,151 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:54:12,151 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:54:12,157 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:54:12,158 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:12" (1/1) ... [2023-11-19 07:54:12,159 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d1fbbad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:12, skipping insertion in model container [2023-11-19 07:54:12,159 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:12" (1/1) ... [2023-11-19 07:54:12,209 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:54:12,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:54:12,934 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:54:13,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:54:13,067 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:54:13,067 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:54:13,077 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:54:13,078 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:13 WrapperNode [2023-11-19 07:54:13,078 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:54:13,080 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:54:13,080 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:54:13,080 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:54:13,090 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:13" (1/1) ... [2023-11-19 07:54:13,135 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:13" (1/1) ... [2023-11-19 07:54:13,184 INFO L138 Inliner]: procedures = 176, calls = 74, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 139 [2023-11-19 07:54:13,185 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:54:13,186 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:54:13,186 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:54:13,186 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:54:13,199 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:13" (1/1) ... [2023-11-19 07:54:13,199 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:13" (1/1) ... [2023-11-19 07:54:13,221 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:13" (1/1) ... [2023-11-19 07:54:13,221 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:13" (1/1) ... [2023-11-19 07:54:13,235 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:13" (1/1) ... [2023-11-19 07:54:13,251 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:13" (1/1) ... [2023-11-19 07:54:13,267 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:13" (1/1) ... [2023-11-19 07:54:13,271 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:13" (1/1) ... [2023-11-19 07:54:13,277 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:54:13,278 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:54:13,279 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:54:13,279 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:54:13,280 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:13" (1/1) ... [2023-11-19 07:54:13,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:54:13,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9809a473-7b84-4833-9190-c88bcbde063a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:13,321 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9809a473-7b84-4833-9190-c88bcbde063a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:54:13,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9809a473-7b84-4833-9190-c88bcbde063a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:54:13,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:54:13,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:54:13,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:54:13,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:54:13,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:54:13,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:54:13,389 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-19 07:54:13,390 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-19 07:54:13,390 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-19 07:54:13,390 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-19 07:54:13,391 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-19 07:54:13,391 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-19 07:54:13,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:54:13,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:54:13,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:54:13,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:54:13,396 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:54:13,666 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:54:13,698 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:54:14,413 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:54:14,945 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:54:14,946 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 07:54:14,954 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:14 BoogieIcfgContainer [2023-11-19 07:54:14,954 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:54:14,958 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:54:14,958 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:54:14,962 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:54:14,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:54:12" (1/3) ... [2023-11-19 07:54:14,964 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50517f00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:14, skipping insertion in model container [2023-11-19 07:54:14,964 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:13" (2/3) ... [2023-11-19 07:54:14,966 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50517f00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:14, skipping insertion in model container [2023-11-19 07:54:14,967 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:14" (3/3) ... [2023-11-19 07:54:14,969 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi006_rmo.i [2023-11-19 07:54:14,992 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:54:14,993 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-19 07:54:14,994 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:54:15,182 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:54:15,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 196 transitions, 404 flow [2023-11-19 07:54:15,459 INFO L124 PetriNetUnfolderBase]: 19/193 cut-off events. [2023-11-19 07:54:15,460 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:54:15,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 193 events. 19/193 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 301 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 136. Up to 3 conditions per place. [2023-11-19 07:54:15,472 INFO L82 GeneralOperation]: Start removeDead. Operand has 187 places, 196 transitions, 404 flow [2023-11-19 07:54:15,491 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 193 transitions, 395 flow [2023-11-19 07:54:15,495 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:54:15,516 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 184 places, 193 transitions, 395 flow [2023-11-19 07:54:15,521 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 184 places, 193 transitions, 395 flow [2023-11-19 07:54:15,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 193 transitions, 395 flow [2023-11-19 07:54:15,639 INFO L124 PetriNetUnfolderBase]: 19/193 cut-off events. [2023-11-19 07:54:15,640 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:54:15,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 193 events. 19/193 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 297 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 136. Up to 3 conditions per place. [2023-11-19 07:54:15,658 INFO L119 LiptonReduction]: Number of co-enabled transitions 9940 [2023-11-19 07:54:29,664 INFO L134 LiptonReduction]: Checked pairs total: 39629 [2023-11-19 07:54:29,664 INFO L136 LiptonReduction]: Total number of compositions: 180 [2023-11-19 07:54:29,680 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:54:29,687 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;@441a1111, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:54:29,687 INFO L358 AbstractCegarLoop]: Starting to check reachability of 77 error locations. [2023-11-19 07:54:29,689 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:54:29,689 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-19 07:54:29,689 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:54:29,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:29,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 07:54:29,691 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-19 07:54:29,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:29,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1036, now seen corresponding path program 1 times [2023-11-19 07:54:29,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:29,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329893351] [2023-11-19 07:54:29,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:29,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:29,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:29,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329893351] [2023-11-19 07:54:29,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329893351] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:29,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:29,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 07:54:29,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888053407] [2023-11-19 07:54:29,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:29,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:54:29,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:29,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:54:29,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:54:29,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 376 [2023-11-19 07:54:29,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 70 transitions, 149 flow. Second operand has 2 states, 2 states have (on average 131.5) internal successors, (263), 2 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:29,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:29,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 376 [2023-11-19 07:54:29,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:34,109 INFO L124 PetriNetUnfolderBase]: 13691/19219 cut-off events. [2023-11-19 07:54:34,110 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-19 07:54:34,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38522 conditions, 19219 events. 13691/19219 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 1477. Compared 120580 event pairs, 13691 based on Foata normal form. 0/9414 useless extension candidates. Maximal degree in co-relation 38511. Up to 19213 conditions per place. [2023-11-19 07:54:34,385 INFO L140 encePairwiseOnDemand]: 349/376 looper letters, 40 selfloop transitions, 0 changer transitions 0/42 dead transitions. [2023-11-19 07:54:34,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 173 flow [2023-11-19 07:54:34,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:54:34,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:54:34,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 329 transitions. [2023-11-19 07:54:34,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-11-19 07:54:34,412 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 329 transitions. [2023-11-19 07:54:34,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 329 transitions. [2023-11-19 07:54:34,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:34,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 329 transitions. [2023-11-19 07:54:34,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 164.5) internal successors, (329), 2 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:34,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 376.0) internal successors, (1128), 3 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:34,432 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 376.0) internal successors, (1128), 3 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:34,434 INFO L175 Difference]: Start difference. First operand has 79 places, 70 transitions, 149 flow. Second operand 2 states and 329 transitions. [2023-11-19 07:54:34,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 173 flow [2023-11-19 07:54:34,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 42 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:54:34,455 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 90 flow [2023-11-19 07:54:34,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=90, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-11-19 07:54:34,464 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -29 predicate places. [2023-11-19 07:54:34,464 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 90 flow [2023-11-19 07:54:34,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 131.5) internal successors, (263), 2 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:34,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:34,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:54:34,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:54:34,466 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-19 07:54:34,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:34,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1023928, now seen corresponding path program 1 times [2023-11-19 07:54:34,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:34,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784623135] [2023-11-19 07:54:34,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:34,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:34,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:34,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784623135] [2023-11-19 07:54:34,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784623135] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:34,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:34,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:54:34,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86047214] [2023-11-19 07:54:34,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:34,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:54:34,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:34,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:54:34,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:54:35,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 376 [2023-11-19 07:54:35,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:35,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:35,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 376 [2023-11-19 07:54:35,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:36,903 INFO L124 PetriNetUnfolderBase]: 5544/7911 cut-off events. [2023-11-19 07:54:36,903 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:54:36,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15881 conditions, 7911 events. 5544/7911 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 43813 event pairs, 5544 based on Foata normal form. 0/4937 useless extension candidates. Maximal degree in co-relation 15878. Up to 7905 conditions per place. [2023-11-19 07:54:36,962 INFO L140 encePairwiseOnDemand]: 368/376 looper letters, 32 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-11-19 07:54:36,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 35 transitions, 142 flow [2023-11-19 07:54:36,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:36,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:36,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 430 transitions. [2023-11-19 07:54:36,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38120567375886527 [2023-11-19 07:54:36,970 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 430 transitions. [2023-11-19 07:54:36,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 430 transitions. [2023-11-19 07:54:36,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:36,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 430 transitions. [2023-11-19 07:54:36,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:36,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:36,982 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:36,984 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 90 flow. Second operand 3 states and 430 transitions. [2023-11-19 07:54:36,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 35 transitions, 142 flow [2023-11-19 07:54:36,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 35 transitions, 142 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:54:36,987 INFO L231 Difference]: Finished difference. Result has 45 places, 35 transitions, 78 flow [2023-11-19 07:54:36,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=45, PETRI_TRANSITIONS=35} [2023-11-19 07:54:36,989 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -34 predicate places. [2023-11-19 07:54:36,989 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 35 transitions, 78 flow [2023-11-19 07:54:36,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:36,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:36,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:54:36,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:54:36,991 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-19 07:54:36,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:36,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1023927, now seen corresponding path program 1 times [2023-11-19 07:54:36,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:36,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525555015] [2023-11-19 07:54:36,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:36,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:37,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:37,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525555015] [2023-11-19 07:54:37,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525555015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:37,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:37,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:54:37,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023566831] [2023-11-19 07:54:37,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:37,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:54:37,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:37,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:54:37,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:54:37,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 376 [2023-11-19 07:54:37,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:37,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:37,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 376 [2023-11-19 07:54:37,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:38,088 INFO L124 PetriNetUnfolderBase]: 3485/5299 cut-off events. [2023-11-19 07:54:38,088 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:54:38,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10640 conditions, 5299 events. 3485/5299 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 29857 event pairs, 1996 based on Foata normal form. 0/4196 useless extension candidates. Maximal degree in co-relation 10636. Up to 3012 conditions per place. [2023-11-19 07:54:38,133 INFO L140 encePairwiseOnDemand]: 360/376 looper letters, 34 selfloop transitions, 9 changer transitions 0/45 dead transitions. [2023-11-19 07:54:38,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 184 flow [2023-11-19 07:54:38,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:38,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:38,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-11-19 07:54:38,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3820921985815603 [2023-11-19 07:54:38,137 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-11-19 07:54:38,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-11-19 07:54:38,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:38,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-11-19 07:54:38,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:38,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:38,145 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:38,146 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 78 flow. Second operand 3 states and 431 transitions. [2023-11-19 07:54:38,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 184 flow [2023-11-19 07:54:38,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:38,148 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 147 flow [2023-11-19 07:54:38,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-11-19 07:54:38,149 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -33 predicate places. [2023-11-19 07:54:38,150 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 147 flow [2023-11-19 07:54:38,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:38,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:38,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:38,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:54:38,151 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-19 07:54:38,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:38,152 INFO L85 PathProgramCache]: Analyzing trace with hash 729342946, now seen corresponding path program 1 times [2023-11-19 07:54:38,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:38,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364091376] [2023-11-19 07:54:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:38,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:38,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:38,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364091376] [2023-11-19 07:54:38,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364091376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:38,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:38,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:54:38,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983740606] [2023-11-19 07:54:38,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:38,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:54:38,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:38,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:54:38,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:54:38,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 376 [2023-11-19 07:54:38,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:38,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:38,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 376 [2023-11-19 07:54:38,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:39,485 INFO L124 PetriNetUnfolderBase]: 3405/5184 cut-off events. [2023-11-19 07:54:39,485 INFO L125 PetriNetUnfolderBase]: For 1638/1641 co-relation queries the response was YES. [2023-11-19 07:54:39,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14309 conditions, 5184 events. 3405/5184 cut-off events. For 1638/1641 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 30667 event pairs, 1151 based on Foata normal form. 0/4597 useless extension candidates. Maximal degree in co-relation 14304. Up to 3806 conditions per place. [2023-11-19 07:54:39,541 INFO L140 encePairwiseOnDemand]: 372/376 looper letters, 64 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-11-19 07:54:39,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 69 transitions, 391 flow [2023-11-19 07:54:39,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:39,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2023-11-19 07:54:39,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953900709219858 [2023-11-19 07:54:39,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2023-11-19 07:54:39,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2023-11-19 07:54:39,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:39,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2023-11-19 07:54:39,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:39,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:39,554 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:39,555 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 147 flow. Second operand 3 states and 446 transitions. [2023-11-19 07:54:39,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 69 transitions, 391 flow [2023-11-19 07:54:39,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 69 transitions, 359 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:54:39,572 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 142 flow [2023-11-19 07:54:39,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2023-11-19 07:54:39,573 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -32 predicate places. [2023-11-19 07:54:39,574 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 142 flow [2023-11-19 07:54:39,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:39,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:39,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:39,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:54:39,575 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-19 07:54:39,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:39,576 INFO L85 PathProgramCache]: Analyzing trace with hash 729343350, now seen corresponding path program 1 times [2023-11-19 07:54:39,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:39,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528966391] [2023-11-19 07:54:39,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:39,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:39,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:39,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528966391] [2023-11-19 07:54:39,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528966391] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:39,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:39,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:54:39,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108540027] [2023-11-19 07:54:39,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:39,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:54:39,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:39,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:54:39,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:54:39,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 376 [2023-11-19 07:54:39,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:39,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:39,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 376 [2023-11-19 07:54:39,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:41,421 INFO L124 PetriNetUnfolderBase]: 4142/6252 cut-off events. [2023-11-19 07:54:41,421 INFO L125 PetriNetUnfolderBase]: For 1417/1417 co-relation queries the response was YES. [2023-11-19 07:54:41,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16793 conditions, 6252 events. 4142/6252 cut-off events. For 1417/1417 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 35262 event pairs, 1273 based on Foata normal form. 0/5255 useless extension candidates. Maximal degree in co-relation 16787. Up to 4334 conditions per place. [2023-11-19 07:54:41,487 INFO L140 encePairwiseOnDemand]: 373/376 looper letters, 65 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-11-19 07:54:41,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 68 transitions, 378 flow [2023-11-19 07:54:41,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:41,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2023-11-19 07:54:41,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39184397163120566 [2023-11-19 07:54:41,492 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2023-11-19 07:54:41,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2023-11-19 07:54:41,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:41,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2023-11-19 07:54:41,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:41,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:41,500 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:41,501 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 142 flow. Second operand 3 states and 442 transitions. [2023-11-19 07:54:41,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 68 transitions, 378 flow [2023-11-19 07:54:41,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 68 transitions, 368 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:54:41,505 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 144 flow [2023-11-19 07:54:41,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-11-19 07:54:41,507 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -31 predicate places. [2023-11-19 07:54:41,507 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 144 flow [2023-11-19 07:54:41,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:41,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:41,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:41,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:54:41,509 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-19 07:54:41,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:41,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1226572834, now seen corresponding path program 1 times [2023-11-19 07:54:41,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:41,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014271796] [2023-11-19 07:54:41,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:41,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:41,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:41,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014271796] [2023-11-19 07:54:41,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014271796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:41,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:41,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:54:41,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946885388] [2023-11-19 07:54:41,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:41,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:54:41,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:41,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:54:41,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:54:41,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 376 [2023-11-19 07:54:41,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 125.2) internal successors, (626), 5 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:41,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:41,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 376 [2023-11-19 07:54:41,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:42,830 INFO L124 PetriNetUnfolderBase]: 3261/4976 cut-off events. [2023-11-19 07:54:42,831 INFO L125 PetriNetUnfolderBase]: For 753/756 co-relation queries the response was YES. [2023-11-19 07:54:42,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13270 conditions, 4976 events. 3261/4976 cut-off events. For 753/756 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 29389 event pairs, 832 based on Foata normal form. 0/4069 useless extension candidates. Maximal degree in co-relation 13263. Up to 2158 conditions per place. [2023-11-19 07:54:42,882 INFO L140 encePairwiseOnDemand]: 367/376 looper letters, 62 selfloop transitions, 9 changer transitions 0/73 dead transitions. [2023-11-19 07:54:42,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 73 transitions, 390 flow [2023-11-19 07:54:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:54:42,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:54:42,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 557 transitions. [2023-11-19 07:54:42,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3703457446808511 [2023-11-19 07:54:42,887 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 557 transitions. [2023-11-19 07:54:42,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 557 transitions. [2023-11-19 07:54:42,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:42,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 557 transitions. [2023-11-19 07:54:42,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.25) internal successors, (557), 4 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:42,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:42,948 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:42,949 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 144 flow. Second operand 4 states and 557 transitions. [2023-11-19 07:54:42,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 73 transitions, 390 flow [2023-11-19 07:54:42,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 73 transitions, 386 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:54:42,952 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 212 flow [2023-11-19 07:54:42,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-11-19 07:54:42,953 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -29 predicate places. [2023-11-19 07:54:42,954 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 212 flow [2023-11-19 07:54:42,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.2) internal successors, (626), 5 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:42,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:42,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:42,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:54:42,955 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-19 07:54:42,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:42,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1134805205, now seen corresponding path program 1 times [2023-11-19 07:54:42,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:42,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916287890] [2023-11-19 07:54:42,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:42,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:43,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:43,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916287890] [2023-11-19 07:54:43,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916287890] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:43,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:43,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:54:43,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391176441] [2023-11-19 07:54:43,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:43,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:54:43,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:43,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:54:43,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:54:43,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 376 [2023-11-19 07:54:43,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 131.75) internal successors, (527), 4 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:43,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:43,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 376 [2023-11-19 07:54:43,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:44,118 INFO L124 PetriNetUnfolderBase]: 3157/4827 cut-off events. [2023-11-19 07:54:44,118 INFO L125 PetriNetUnfolderBase]: For 3194/3194 co-relation queries the response was YES. [2023-11-19 07:54:44,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14634 conditions, 4827 events. 3157/4827 cut-off events. For 3194/3194 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 26987 event pairs, 2097 based on Foata normal form. 48/4445 useless extension candidates. Maximal degree in co-relation 14625. Up to 3456 conditions per place. [2023-11-19 07:54:44,161 INFO L140 encePairwiseOnDemand]: 373/376 looper letters, 62 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-11-19 07:54:44,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 408 flow [2023-11-19 07:54:44,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:54:44,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:54:44,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 569 transitions. [2023-11-19 07:54:44,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783244680851064 [2023-11-19 07:54:44,165 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 569 transitions. [2023-11-19 07:54:44,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 569 transitions. [2023-11-19 07:54:44,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:44,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 569 transitions. [2023-11-19 07:54:44,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:44,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:44,175 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:44,175 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 212 flow. Second operand 4 states and 569 transitions. [2023-11-19 07:54:44,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 408 flow [2023-11-19 07:54:44,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 67 transitions, 403 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:54:44,199 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 209 flow [2023-11-19 07:54:44,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=209, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-11-19 07:54:44,201 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -29 predicate places. [2023-11-19 07:54:44,201 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 209 flow [2023-11-19 07:54:44,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.75) internal successors, (527), 4 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:44,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:44,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:44,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:54:44,202 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-19 07:54:44,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:44,203 INFO L85 PathProgramCache]: Analyzing trace with hash -987738555, now seen corresponding path program 1 times [2023-11-19 07:54:44,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:44,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542218938] [2023-11-19 07:54:44,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:44,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:44,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:44,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542218938] [2023-11-19 07:54:44,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542218938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:44,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:44,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:54:44,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108778305] [2023-11-19 07:54:44,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:44,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:54:44,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:44,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:54:44,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:54:44,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 376 [2023-11-19 07:54:44,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 209 flow. Second operand has 5 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:44,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:44,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 376 [2023-11-19 07:54:44,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:45,919 INFO L124 PetriNetUnfolderBase]: 3131/4789 cut-off events. [2023-11-19 07:54:45,919 INFO L125 PetriNetUnfolderBase]: For 3509/3512 co-relation queries the response was YES. [2023-11-19 07:54:45,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14504 conditions, 4789 events. 3131/4789 cut-off events. For 3509/3512 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 27404 event pairs, 1089 based on Foata normal form. 12/4374 useless extension candidates. Maximal degree in co-relation 14496. Up to 3451 conditions per place. [2023-11-19 07:54:45,958 INFO L140 encePairwiseOnDemand]: 370/376 looper letters, 72 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2023-11-19 07:54:45,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 83 transitions, 513 flow [2023-11-19 07:54:45,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:54:45,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:54:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 558 transitions. [2023-11-19 07:54:45,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37101063829787234 [2023-11-19 07:54:45,968 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 558 transitions. [2023-11-19 07:54:45,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 558 transitions. [2023-11-19 07:54:45,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:45,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 558 transitions. [2023-11-19 07:54:45,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:45,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:45,976 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:45,977 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 209 flow. Second operand 4 states and 558 transitions. [2023-11-19 07:54:45,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 83 transitions, 513 flow [2023-11-19 07:54:46,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 83 transitions, 507 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:54:46,003 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 272 flow [2023-11-19 07:54:46,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-11-19 07:54:46,007 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -26 predicate places. [2023-11-19 07:54:46,008 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 272 flow [2023-11-19 07:54:46,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:46,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:46,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:46,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:54:46,009 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-19 07:54:46,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:46,011 INFO L85 PathProgramCache]: Analyzing trace with hash 819297880, now seen corresponding path program 1 times [2023-11-19 07:54:46,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:46,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006059174] [2023-11-19 07:54:46,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:46,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:46,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:46,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006059174] [2023-11-19 07:54:46,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006059174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:46,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:46,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:54:46,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542090381] [2023-11-19 07:54:46,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:46,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:54:46,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:46,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:54:46,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:54:46,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 376 [2023-11-19 07:54:46,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 124.4) internal successors, (622), 5 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:46,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:46,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 376 [2023-11-19 07:54:46,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:47,055 INFO L124 PetriNetUnfolderBase]: 2729/4188 cut-off events. [2023-11-19 07:54:47,055 INFO L125 PetriNetUnfolderBase]: For 3130/3130 co-relation queries the response was YES. [2023-11-19 07:54:47,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13888 conditions, 4188 events. 2729/4188 cut-off events. For 3130/3130 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 22546 event pairs, 1060 based on Foata normal form. 64/3846 useless extension candidates. Maximal degree in co-relation 13878. Up to 1709 conditions per place. [2023-11-19 07:54:47,085 INFO L140 encePairwiseOnDemand]: 363/376 looper letters, 54 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2023-11-19 07:54:47,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 72 transitions, 516 flow [2023-11-19 07:54:47,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:54:47,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:54:47,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 542 transitions. [2023-11-19 07:54:47,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3603723404255319 [2023-11-19 07:54:47,089 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 542 transitions. [2023-11-19 07:54:47,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 542 transitions. [2023-11-19 07:54:47,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:47,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 542 transitions. [2023-11-19 07:54:47,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.5) internal successors, (542), 4 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:47,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:47,096 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:47,096 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 272 flow. Second operand 4 states and 542 transitions. [2023-11-19 07:54:47,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 72 transitions, 516 flow [2023-11-19 07:54:47,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 72 transitions, 508 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:47,115 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 394 flow [2023-11-19 07:54:47,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=394, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2023-11-19 07:54:47,116 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -22 predicate places. [2023-11-19 07:54:47,116 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 394 flow [2023-11-19 07:54:47,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.4) internal successors, (622), 5 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:47,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:47,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:47,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:54:47,118 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-19 07:54:47,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:47,118 INFO L85 PathProgramCache]: Analyzing trace with hash -732347605, now seen corresponding path program 1 times [2023-11-19 07:54:47,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:47,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696206223] [2023-11-19 07:54:47,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:47,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:48,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:48,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696206223] [2023-11-19 07:54:48,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696206223] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:48,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:48,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:54:48,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005809197] [2023-11-19 07:54:48,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:48,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:54:48,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:48,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:54:48,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:54:49,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 376 [2023-11-19 07:54:49,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 394 flow. Second operand has 8 states, 8 states have (on average 115.625) internal successors, (925), 8 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:49,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:49,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 376 [2023-11-19 07:54:49,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:50,650 INFO L124 PetriNetUnfolderBase]: 3201/4938 cut-off events. [2023-11-19 07:54:50,651 INFO L125 PetriNetUnfolderBase]: For 6195/6195 co-relation queries the response was YES. [2023-11-19 07:54:50,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17890 conditions, 4938 events. 3201/4938 cut-off events. For 6195/6195 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 27722 event pairs, 1253 based on Foata normal form. 21/4512 useless extension candidates. Maximal degree in co-relation 17879. Up to 4319 conditions per place. [2023-11-19 07:54:50,694 INFO L140 encePairwiseOnDemand]: 363/376 looper letters, 89 selfloop transitions, 23 changer transitions 0/113 dead transitions. [2023-11-19 07:54:50,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 113 transitions, 883 flow [2023-11-19 07:54:50,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:54:50,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:54:50,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1111 transitions. [2023-11-19 07:54:50,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3283096926713948 [2023-11-19 07:54:50,702 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1111 transitions. [2023-11-19 07:54:50,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1111 transitions. [2023-11-19 07:54:50,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:50,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1111 transitions. [2023-11-19 07:54:50,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 123.44444444444444) internal successors, (1111), 9 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:50,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 376.0) internal successors, (3760), 10 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:50,719 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 376.0) internal successors, (3760), 10 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:50,719 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 394 flow. Second operand 9 states and 1111 transitions. [2023-11-19 07:54:50,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 113 transitions, 883 flow [2023-11-19 07:54:50,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 113 transitions, 877 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:50,762 INFO L231 Difference]: Finished difference. Result has 70 places, 78 transitions, 666 flow [2023-11-19 07:54:50,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=666, PETRI_PLACES=70, PETRI_TRANSITIONS=78} [2023-11-19 07:54:50,763 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -9 predicate places. [2023-11-19 07:54:50,763 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 78 transitions, 666 flow [2023-11-19 07:54:50,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 115.625) internal successors, (925), 8 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:50,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:50,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:50,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:54:50,765 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-19 07:54:50,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:50,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1878806229, now seen corresponding path program 2 times [2023-11-19 07:54:50,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:50,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707731763] [2023-11-19 07:54:50,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:50,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:52,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:52,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707731763] [2023-11-19 07:54:52,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707731763] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:52,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:52,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:54:52,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72606266] [2023-11-19 07:54:52,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:52,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:54:52,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:52,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:54:52,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:54:52,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 376 [2023-11-19 07:54:52,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 78 transitions, 666 flow. Second operand has 9 states, 9 states have (on average 115.44444444444444) internal successors, (1039), 9 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:52,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:52,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 376 [2023-11-19 07:54:52,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:53,749 INFO L124 PetriNetUnfolderBase]: 3685/5644 cut-off events. [2023-11-19 07:54:53,749 INFO L125 PetriNetUnfolderBase]: For 10227/10230 co-relation queries the response was YES. [2023-11-19 07:54:53,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22476 conditions, 5644 events. 3685/5644 cut-off events. For 10227/10230 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 32037 event pairs, 588 based on Foata normal form. 45/5191 useless extension candidates. Maximal degree in co-relation 22458. Up to 4449 conditions per place. [2023-11-19 07:54:53,795 INFO L140 encePairwiseOnDemand]: 364/376 looper letters, 92 selfloop transitions, 42 changer transitions 2/137 dead transitions. [2023-11-19 07:54:53,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 137 transitions, 1294 flow [2023-11-19 07:54:53,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:54:53,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:54:53,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1112 transitions. [2023-11-19 07:54:53,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32860520094562645 [2023-11-19 07:54:53,802 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1112 transitions. [2023-11-19 07:54:53,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1112 transitions. [2023-11-19 07:54:53,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:53,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1112 transitions. [2023-11-19 07:54:53,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 123.55555555555556) internal successors, (1112), 9 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:53,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 376.0) internal successors, (3760), 10 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:53,817 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 376.0) internal successors, (3760), 10 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:53,818 INFO L175 Difference]: Start difference. First operand has 70 places, 78 transitions, 666 flow. Second operand 9 states and 1112 transitions. [2023-11-19 07:54:53,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 137 transitions, 1294 flow [2023-11-19 07:54:53,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 137 transitions, 1269 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:53,877 INFO L231 Difference]: Finished difference. Result has 82 places, 100 transitions, 1038 flow [2023-11-19 07:54:53,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1038, PETRI_PLACES=82, PETRI_TRANSITIONS=100} [2023-11-19 07:54:53,878 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 3 predicate places. [2023-11-19 07:54:53,879 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 100 transitions, 1038 flow [2023-11-19 07:54:53,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 115.44444444444444) internal successors, (1039), 9 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:53,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:53,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:53,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:54:53,880 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-19 07:54:53,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:53,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1754402387, now seen corresponding path program 3 times [2023-11-19 07:54:53,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:53,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570745162] [2023-11-19 07:54:53,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:53,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:55,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:55,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570745162] [2023-11-19 07:54:55,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570745162] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:55,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:55,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:54:55,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406646399] [2023-11-19 07:54:55,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:55,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:54:55,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:55,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:54:55,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56