./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/04_incdec_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_42a87a63-4049-4104-83c3-293f5d3dabbd/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a87a63-4049-4104-83c3-293f5d3dabbd/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a87a63-4049-4104-83c3-293f5d3dabbd/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a87a63-4049-4104-83c3-293f5d3dabbd/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/04_incdec_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a87a63-4049-4104-83c3-293f5d3dabbd/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a87a63-4049-4104-83c3-293f5d3dabbd/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --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 a025fe4ca65874bde9a09e6a2d9fa9eceda581ed1bc5b23e0ff5285795ed115b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:07:25,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:07:25,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:07:25,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:07:25,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:07:25,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:07:25,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:07:25,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:07:25,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:07:25,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:07:25,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:07:25,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:07:25,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:07:25,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:07:25,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:07:25,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:07:25,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:07:25,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:07:26,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:07:26,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:07:26,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:07:26,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:07:26,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:07:26,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:07:26,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:07:26,014 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:07:26,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:07:26,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:07:26,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:07:26,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:07:26,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:07:26,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:07:26,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:07:26,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:07:26,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:07:26,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:07:26,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:07:26,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:07:26,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:07:26,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:07:26,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:07:26,032 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a87a63-4049-4104-83c3-293f5d3dabbd/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:07:26,071 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:07:26,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:07:26,072 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:07:26,072 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:07:26,073 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:07:26,073 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:07:26,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:07:26,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:07:26,074 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:07:26,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:07:26,076 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:07:26,076 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:07:26,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:07:26,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:07:26,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:07:26,077 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:07:26,077 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:07:26,077 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:07:26,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:07:26,078 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:07:26,078 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:07:26,078 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:07:26,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:07:26,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:07:26,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:07:26,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:07:26,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:07:26,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:07:26,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:07:26,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:07:26,080 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:07:26,080 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:07:26,081 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:07:26,081 INFO L138 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_42a87a63-4049-4104-83c3-293f5d3dabbd/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a87a63-4049-4104-83c3-293f5d3dabbd/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a025fe4ca65874bde9a09e6a2d9fa9eceda581ed1bc5b23e0ff5285795ed115b [2022-11-25 17:07:26,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:07:26,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:07:26,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:07:26,367 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:07:26,370 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:07:26,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a87a63-4049-4104-83c3-293f5d3dabbd/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2022-11-25 17:07:29,545 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:07:29,867 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:07:29,867 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a87a63-4049-4104-83c3-293f5d3dabbd/sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2022-11-25 17:07:29,879 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a87a63-4049-4104-83c3-293f5d3dabbd/bin/uautomizer-ZsLfNo2U6R/data/8e9ff67d4/e8a255c4399144c5a56d5a349f7f4462/FLAGfac4ff0fe [2022-11-25 17:07:29,901 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a87a63-4049-4104-83c3-293f5d3dabbd/bin/uautomizer-ZsLfNo2U6R/data/8e9ff67d4/e8a255c4399144c5a56d5a349f7f4462 [2022-11-25 17:07:29,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:07:29,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:07:29,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:07:29,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:07:29,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:07:29,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:07:29" (1/1) ... [2022-11-25 17:07:29,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52bcbf93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:29, skipping insertion in model container [2022-11-25 17:07:29,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:07:29" (1/1) ... [2022-11-25 17:07:29,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:07:29,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:07:30,323 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a87a63-4049-4104-83c3-293f5d3dabbd/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30285,30298] [2022-11-25 17:07:30,333 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a87a63-4049-4104-83c3-293f5d3dabbd/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30729,30742] [2022-11-25 17:07:30,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:07:30,351 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:07:30,385 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a87a63-4049-4104-83c3-293f5d3dabbd/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30285,30298] [2022-11-25 17:07:30,388 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a87a63-4049-4104-83c3-293f5d3dabbd/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30729,30742] [2022-11-25 17:07:30,392 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:07:30,423 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:07:30,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:30 WrapperNode [2022-11-25 17:07:30,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:07:30,425 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:07:30,425 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:07:30,426 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:07:30,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:30" (1/1) ... [2022-11-25 17:07:30,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:30" (1/1) ... [2022-11-25 17:07:30,494 INFO L138 Inliner]: procedures = 172, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 158 [2022-11-25 17:07:30,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:07:30,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:07:30,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:07:30,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:07:30,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:30" (1/1) ... [2022-11-25 17:07:30,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:30" (1/1) ... [2022-11-25 17:07:30,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:30" (1/1) ... [2022-11-25 17:07:30,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:30" (1/1) ... [2022-11-25 17:07:30,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:30" (1/1) ... [2022-11-25 17:07:30,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:30" (1/1) ... [2022-11-25 17:07:30,531 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:30" (1/1) ... [2022-11-25 17:07:30,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:30" (1/1) ... [2022-11-25 17:07:30,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:07:30,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:07:30,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:07:30,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:07:30,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:30" (1/1) ... [2022-11-25 17:07:30,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:07:30,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a87a63-4049-4104-83c3-293f5d3dabbd/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:07:30,578 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a87a63-4049-4104-83c3-293f5d3dabbd/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:07:30,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a87a63-4049-4104-83c3-293f5d3dabbd/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:07:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:07:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-25 17:07:30,611 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-25 17:07:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:07:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:07:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:07:30,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:07:30,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:07:30,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:07:30,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:07:30,614 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:07:30,743 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:07:30,746 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:07:31,302 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:07:31,762 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:07:31,762 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 17:07:31,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:07:31 BoogieIcfgContainer [2022-11-25 17:07:31,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:07:31,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:07:31,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:07:31,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:07:31,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:07:29" (1/3) ... [2022-11-25 17:07:31,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@552ab689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:07:31, skipping insertion in model container [2022-11-25 17:07:31,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:30" (2/3) ... [2022-11-25 17:07:31,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@552ab689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:07:31, skipping insertion in model container [2022-11-25 17:07:31,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:07:31" (3/3) ... [2022-11-25 17:07:31,781 INFO L112 eAbstractionObserver]: Analyzing ICFG 04_incdec_cas.i [2022-11-25 17:07:31,803 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:07:31,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2022-11-25 17:07:31,803 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:07:31,979 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:07:32,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 147 transitions, 299 flow [2022-11-25 17:07:32,146 INFO L130 PetriNetUnfolder]: 9/163 cut-off events. [2022-11-25 17:07:32,146 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:07:32,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 163 events. 9/163 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 566 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 122. Up to 4 conditions per place. [2022-11-25 17:07:32,154 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 147 transitions, 299 flow [2022-11-25 17:07:32,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 147 transitions, 299 flow [2022-11-25 17:07:32,170 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:07:32,187 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 147 transitions, 299 flow [2022-11-25 17:07:32,190 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 147 transitions, 299 flow [2022-11-25 17:07:32,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 147 transitions, 299 flow [2022-11-25 17:07:32,229 INFO L130 PetriNetUnfolder]: 9/163 cut-off events. [2022-11-25 17:07:32,229 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:07:32,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 163 events. 9/163 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 566 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 122. Up to 4 conditions per place. [2022-11-25 17:07:32,233 INFO L119 LiptonReduction]: Number of co-enabled transitions 3952 [2022-11-25 17:07:44,998 INFO L134 LiptonReduction]: Checked pairs total: 6690 [2022-11-25 17:07:44,998 INFO L136 LiptonReduction]: Total number of compositions: 138 [2022-11-25 17:07:45,015 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:07:45,021 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;@189b75dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:07:45,022 INFO L358 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2022-11-25 17:07:45,024 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 17:07:45,025 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:07:45,025 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:07:45,026 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:07:45,026 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-11-25 17:07:45,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:45,032 INFO L85 PathProgramCache]: Analyzing trace with hash 26966, now seen corresponding path program 1 times [2022-11-25 17:07:45,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:45,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317740459] [2022-11-25 17:07:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:45,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:45,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:45,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317740459] [2022-11-25 17:07:45,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317740459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:07:45,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:07:45,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:07:45,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728033876] [2022-11-25 17:07:45,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:07:45,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:07:45,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:45,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:07:45,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:07:45,243 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 285 [2022-11-25 17:07:45,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 67 transitions, 139 flow. Second operand has 2 states, 2 states have (on average 109.0) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:45,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:07:45,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 285 [2022-11-25 17:07:45,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:07:45,485 INFO L130 PetriNetUnfolder]: 165/356 cut-off events. [2022-11-25 17:07:45,485 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:07:45,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 356 events. 165/356 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 1803 event pairs, 140 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 692. Up to 350 conditions per place. [2022-11-25 17:07:45,492 INFO L137 encePairwiseOnDemand]: 269/285 looper letters, 46 selfloop transitions, 0 changer transitions 0/51 dead transitions. [2022-11-25 17:07:45,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 51 transitions, 199 flow [2022-11-25 17:07:45,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:07:45,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 17:07:45,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 278 transitions. [2022-11-25 17:07:45,516 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48771929824561405 [2022-11-25 17:07:45,517 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 278 transitions. [2022-11-25 17:07:45,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 278 transitions. [2022-11-25 17:07:45,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:07:45,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 278 transitions. [2022-11-25 17:07:45,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 139.0) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:45,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 285.0) internal successors, (855), 3 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:45,539 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 285.0) internal successors, (855), 3 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:45,541 INFO L175 Difference]: Start difference. First operand has 63 places, 67 transitions, 139 flow. Second operand 2 states and 278 transitions. [2022-11-25 17:07:45,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 51 transitions, 199 flow [2022-11-25 17:07:45,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 51 transitions, 199 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:07:45,547 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 107 flow [2022-11-25 17:07:45,550 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=107, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2022-11-25 17:07:45,554 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -13 predicate places. [2022-11-25 17:07:45,555 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 107 flow [2022-11-25 17:07:45,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 109.0) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:45,555 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:07:45,555 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:07:45,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:07:45,556 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-11-25 17:07:45,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:45,557 INFO L85 PathProgramCache]: Analyzing trace with hash 26995, now seen corresponding path program 1 times [2022-11-25 17:07:45,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:45,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350391945] [2022-11-25 17:07:45,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:45,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:45,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:45,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350391945] [2022-11-25 17:07:45,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350391945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:07:45,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:07:45,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:07:45,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605747406] [2022-11-25 17:07:45,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:07:45,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:07:45,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:45,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:07:45,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:07:45,786 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 285 [2022-11-25 17:07:45,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:45,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:07:45,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 285 [2022-11-25 17:07:45,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:07:45,958 INFO L130 PetriNetUnfolder]: 124/281 cut-off events. [2022-11-25 17:07:45,959 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:07:45,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 564 conditions, 281 events. 124/281 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1386 event pairs, 102 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 560. Up to 254 conditions per place. [2022-11-25 17:07:45,961 INFO L137 encePairwiseOnDemand]: 278/285 looper letters, 43 selfloop transitions, 6 changer transitions 0/54 dead transitions. [2022-11-25 17:07:45,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 54 transitions, 211 flow [2022-11-25 17:07:45,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:07:45,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:07:45,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2022-11-25 17:07:45,964 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4023391812865497 [2022-11-25 17:07:45,964 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2022-11-25 17:07:45,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2022-11-25 17:07:45,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:07:45,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2022-11-25 17:07:45,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:45,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:45,977 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:45,977 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 107 flow. Second operand 3 states and 344 transitions. [2022-11-25 17:07:45,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 54 transitions, 211 flow [2022-11-25 17:07:45,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 54 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:07:45,986 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 137 flow [2022-11-25 17:07:45,986 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2022-11-25 17:07:45,987 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2022-11-25 17:07:45,987 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 137 flow [2022-11-25 17:07:45,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:45,988 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:07:45,988 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:07:45,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:07:45,989 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-11-25 17:07:45,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:45,990 INFO L85 PathProgramCache]: Analyzing trace with hash 26996, now seen corresponding path program 1 times [2022-11-25 17:07:45,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:45,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988073351] [2022-11-25 17:07:45,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:45,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:46,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:46,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988073351] [2022-11-25 17:07:46,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988073351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:07:46,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:07:46,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:07:46,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015289063] [2022-11-25 17:07:46,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:07:46,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:07:46,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:46,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:07:46,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:07:46,139 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 285 [2022-11-25 17:07:46,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:46,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:07:46,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 285 [2022-11-25 17:07:46,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:07:46,305 INFO L130 PetriNetUnfolder]: 84/204 cut-off events. [2022-11-25 17:07:46,307 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-11-25 17:07:46,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 204 events. 84/204 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 972 event pairs, 69 based on Foata normal form. 37/158 useless extension candidates. Maximal degree in co-relation 471. Up to 196 conditions per place. [2022-11-25 17:07:46,312 INFO L137 encePairwiseOnDemand]: 283/285 looper letters, 45 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2022-11-25 17:07:46,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 227 flow [2022-11-25 17:07:46,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:07:46,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:07:46,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 358 transitions. [2022-11-25 17:07:46,319 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41871345029239765 [2022-11-25 17:07:46,319 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 358 transitions. [2022-11-25 17:07:46,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 358 transitions. [2022-11-25 17:07:46,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:07:46,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 358 transitions. [2022-11-25 17:07:46,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:46,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:46,332 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:46,332 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 137 flow. Second operand 3 states and 358 transitions. [2022-11-25 17:07:46,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 227 flow [2022-11-25 17:07:46,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 215 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:07:46,337 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 125 flow [2022-11-25 17:07:46,342 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2022-11-25 17:07:46,343 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -10 predicate places. [2022-11-25 17:07:46,343 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 125 flow [2022-11-25 17:07:46,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:46,343 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:07:46,344 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:07:46,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:07:46,344 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-11-25 17:07:46,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:46,345 INFO L85 PathProgramCache]: Analyzing trace with hash 804853656, now seen corresponding path program 1 times [2022-11-25 17:07:46,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:46,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150624779] [2022-11-25 17:07:46,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:46,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:46,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:46,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150624779] [2022-11-25 17:07:46,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150624779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:07:46,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:07:46,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:07:46,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14013397] [2022-11-25 17:07:46,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:07:46,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:07:46,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:46,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:07:46,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:07:46,688 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 285 [2022-11-25 17:07:46,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 125 flow. Second operand has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:46,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:07:46,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 285 [2022-11-25 17:07:46,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:07:46,843 INFO L130 PetriNetUnfolder]: 80/192 cut-off events. [2022-11-25 17:07:46,844 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-25 17:07:46,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 192 events. 80/192 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 899 event pairs, 64 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 434. Up to 171 conditions per place. [2022-11-25 17:07:46,846 INFO L137 encePairwiseOnDemand]: 276/285 looper letters, 40 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2022-11-25 17:07:46,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 48 transitions, 209 flow [2022-11-25 17:07:46,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:07:46,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:07:46,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 331 transitions. [2022-11-25 17:07:46,848 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3871345029239766 [2022-11-25 17:07:46,849 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 331 transitions. [2022-11-25 17:07:46,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 331 transitions. [2022-11-25 17:07:46,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:07:46,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 331 transitions. [2022-11-25 17:07:46,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:46,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:46,854 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:46,854 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 125 flow. Second operand 3 states and 331 transitions. [2022-11-25 17:07:46,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 48 transitions, 209 flow [2022-11-25 17:07:46,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 48 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:07:46,857 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 126 flow [2022-11-25 17:07:46,857 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2022-11-25 17:07:46,858 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -13 predicate places. [2022-11-25 17:07:46,858 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 126 flow [2022-11-25 17:07:46,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:46,859 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:07:46,859 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:07:46,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:07:46,860 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-11-25 17:07:46,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:46,860 INFO L85 PathProgramCache]: Analyzing trace with hash 804853657, now seen corresponding path program 1 times [2022-11-25 17:07:46,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:46,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006380907] [2022-11-25 17:07:46,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:46,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:47,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:47,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006380907] [2022-11-25 17:07:47,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006380907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:07:47,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:07:47,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:07:47,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813264804] [2022-11-25 17:07:47,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:07:47,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:07:47,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:47,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:07:47,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:07:47,152 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 285 [2022-11-25 17:07:47,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:47,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:07:47,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 285 [2022-11-25 17:07:47,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:07:47,279 INFO L130 PetriNetUnfolder]: 76/180 cut-off events. [2022-11-25 17:07:47,279 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-11-25 17:07:47,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 180 events. 76/180 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 808 event pairs, 61 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 423. Up to 176 conditions per place. [2022-11-25 17:07:47,281 INFO L137 encePairwiseOnDemand]: 280/285 looper letters, 41 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2022-11-25 17:07:47,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 43 transitions, 202 flow [2022-11-25 17:07:47,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:07:47,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:07:47,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2022-11-25 17:07:47,283 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4105263157894737 [2022-11-25 17:07:47,283 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2022-11-25 17:07:47,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2022-11-25 17:07:47,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:07:47,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2022-11-25 17:07:47,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:47,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:47,288 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:47,288 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 126 flow. Second operand 3 states and 351 transitions. [2022-11-25 17:07:47,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 43 transitions, 202 flow [2022-11-25 17:07:47,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 192 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:07:47,290 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 110 flow [2022-11-25 17:07:47,290 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2022-11-25 17:07:47,291 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -17 predicate places. [2022-11-25 17:07:47,291 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 110 flow [2022-11-25 17:07:47,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:47,291 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:07:47,292 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 17:07:47,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:07:47,292 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-11-25 17:07:47,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:47,292 INFO L85 PathProgramCache]: Analyzing trace with hash -819435276, now seen corresponding path program 1 times [2022-11-25 17:07:47,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:47,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958453228] [2022-11-25 17:07:47,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:47,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:07:47,304 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:07:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:07:47,328 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:07:47,329 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:07:47,330 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (79 of 80 remaining) [2022-11-25 17:07:47,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 80 remaining) [2022-11-25 17:07:47,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 80 remaining) [2022-11-25 17:07:47,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 80 remaining) [2022-11-25 17:07:47,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 80 remaining) [2022-11-25 17:07:47,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 80 remaining) [2022-11-25 17:07:47,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 80 remaining) [2022-11-25 17:07:47,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 80 remaining) [2022-11-25 17:07:47,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 80 remaining) [2022-11-25 17:07:47,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (70 of 80 remaining) [2022-11-25 17:07:47,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 80 remaining) [2022-11-25 17:07:47,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 80 remaining) [2022-11-25 17:07:47,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 80 remaining) [2022-11-25 17:07:47,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 80 remaining) [2022-11-25 17:07:47,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37ASSERT_VIOLATIONMEMORY_LEAK (65 of 80 remaining) [2022-11-25 17:07:47,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 80 remaining) [2022-11-25 17:07:47,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 80 remaining) [2022-11-25 17:07:47,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 80 remaining) [2022-11-25 17:07:47,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 80 remaining) [2022-11-25 17:07:47,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 80 remaining) [2022-11-25 17:07:47,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 80 remaining) [2022-11-25 17:07:47,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 80 remaining) [2022-11-25 17:07:47,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 80 remaining) [2022-11-25 17:07:47,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 80 remaining) [2022-11-25 17:07:47,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 80 remaining) [2022-11-25 17:07:47,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 80 remaining) [2022-11-25 17:07:47,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 80 remaining) [2022-11-25 17:07:47,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 80 remaining) [2022-11-25 17:07:47,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 80 remaining) [2022-11-25 17:07:47,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 80 remaining) [2022-11-25 17:07:47,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 80 remaining) [2022-11-25 17:07:47,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 80 remaining) [2022-11-25 17:07:47,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 80 remaining) [2022-11-25 17:07:47,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 80 remaining) [2022-11-25 17:07:47,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 80 remaining) [2022-11-25 17:07:47,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 80 remaining) [2022-11-25 17:07:47,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 80 remaining) [2022-11-25 17:07:47,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 80 remaining) [2022-11-25 17:07:47,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 80 remaining) [2022-11-25 17:07:47,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (40 of 80 remaining) [2022-11-25 17:07:47,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 80 remaining) [2022-11-25 17:07:47,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 80 remaining) [2022-11-25 17:07:47,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 80 remaining) [2022-11-25 17:07:47,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 80 remaining) [2022-11-25 17:07:47,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 80 remaining) [2022-11-25 17:07:47,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 80 remaining) [2022-11-25 17:07:47,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 80 remaining) [2022-11-25 17:07:47,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 80 remaining) [2022-11-25 17:07:47,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 80 remaining) [2022-11-25 17:07:47,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 80 remaining) [2022-11-25 17:07:47,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (29 of 80 remaining) [2022-11-25 17:07:47,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 80 remaining) [2022-11-25 17:07:47,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 80 remaining) [2022-11-25 17:07:47,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 80 remaining) [2022-11-25 17:07:47,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 80 remaining) [2022-11-25 17:07:47,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37ASSERT_VIOLATIONMEMORY_LEAK (24 of 80 remaining) [2022-11-25 17:07:47,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 80 remaining) [2022-11-25 17:07:47,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 80 remaining) [2022-11-25 17:07:47,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 80 remaining) [2022-11-25 17:07:47,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 80 remaining) [2022-11-25 17:07:47,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 80 remaining) [2022-11-25 17:07:47,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 80 remaining) [2022-11-25 17:07:47,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 80 remaining) [2022-11-25 17:07:47,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 80 remaining) [2022-11-25 17:07:47,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 80 remaining) [2022-11-25 17:07:47,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 80 remaining) [2022-11-25 17:07:47,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 80 remaining) [2022-11-25 17:07:47,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 80 remaining) [2022-11-25 17:07:47,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 80 remaining) [2022-11-25 17:07:47,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 80 remaining) [2022-11-25 17:07:47,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 80 remaining) [2022-11-25 17:07:47,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 80 remaining) [2022-11-25 17:07:47,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 80 remaining) [2022-11-25 17:07:47,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 80 remaining) [2022-11-25 17:07:47,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 80 remaining) [2022-11-25 17:07:47,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 80 remaining) [2022-11-25 17:07:47,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 80 remaining) [2022-11-25 17:07:47,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 80 remaining) [2022-11-25 17:07:47,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 80 remaining) [2022-11-25 17:07:47,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 80 remaining) [2022-11-25 17:07:47,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:07:47,346 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-25 17:07:47,349 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:07:47,349 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 17:07:47,481 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:07:47,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 252 transitions, 516 flow [2022-11-25 17:07:47,557 INFO L130 PetriNetUnfolder]: 17/286 cut-off events. [2022-11-25 17:07:47,557 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:07:47,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 286 events. 17/286 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1340 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 226. Up to 6 conditions per place. [2022-11-25 17:07:47,561 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 252 transitions, 516 flow [2022-11-25 17:07:47,567 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 252 transitions, 516 flow [2022-11-25 17:07:47,567 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:07:47,567 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 242 places, 252 transitions, 516 flow [2022-11-25 17:07:47,567 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 242 places, 252 transitions, 516 flow [2022-11-25 17:07:47,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 252 transitions, 516 flow [2022-11-25 17:07:47,617 INFO L130 PetriNetUnfolder]: 17/286 cut-off events. [2022-11-25 17:07:47,617 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:07:47,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 286 events. 17/286 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1340 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 226. Up to 6 conditions per place. [2022-11-25 17:07:47,634 INFO L119 LiptonReduction]: Number of co-enabled transitions 29744 [2022-11-25 17:08:08,942 INFO L134 LiptonReduction]: Checked pairs total: 64727 [2022-11-25 17:08:08,943 INFO L136 LiptonReduction]: Total number of compositions: 206 [2022-11-25 17:08:08,947 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:08:08,949 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;@189b75dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:08:08,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 118 error locations. [2022-11-25 17:08:08,952 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-11-25 17:08:08,952 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:08:08,952 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:08,952 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:08:08,952 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2022-11-25 17:08:08,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:08,953 INFO L85 PathProgramCache]: Analyzing trace with hash 44933, now seen corresponding path program 1 times [2022-11-25 17:08:08,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:08,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628022238] [2022-11-25 17:08:08,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:08,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:08:09,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:09,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628022238] [2022-11-25 17:08:09,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628022238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:08:09,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:08:09,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:08:09,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304746838] [2022-11-25 17:08:09,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:08:09,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:08:09,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:09,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:08:09,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:08:09,090 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 458 [2022-11-25 17:08:09,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 126 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:09,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:09,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 458 [2022-11-25 17:08:09,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:08:11,871 INFO L130 PetriNetUnfolder]: 8881/14604 cut-off events. [2022-11-25 17:08:11,871 INFO L131 PetriNetUnfolder]: For 144/144 co-relation queries the response was YES. [2022-11-25 17:08:11,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28466 conditions, 14604 events. 8881/14604 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 2230. Compared 127663 event pairs, 7681 based on Foata normal form. 0/5087 useless extension candidates. Maximal degree in co-relation 5542. Up to 13684 conditions per place. [2022-11-25 17:08:11,980 INFO L137 encePairwiseOnDemand]: 442/458 looper letters, 91 selfloop transitions, 1 changer transitions 0/111 dead transitions. [2022-11-25 17:08:11,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 111 transitions, 418 flow [2022-11-25 17:08:11,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:08:11,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:08:11,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2022-11-25 17:08:11,983 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4534206695778748 [2022-11-25 17:08:11,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2022-11-25 17:08:11,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2022-11-25 17:08:11,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:08:11,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2022-11-25 17:08:11,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:11,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:11,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:11,991 INFO L175 Difference]: Start difference. First operand has 117 places, 126 transitions, 264 flow. Second operand 3 states and 623 transitions. [2022-11-25 17:08:11,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 111 transitions, 418 flow [2022-11-25 17:08:11,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 111 transitions, 416 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-25 17:08:11,996 INFO L231 Difference]: Finished difference. Result has 108 places, 111 transitions, 234 flow [2022-11-25 17:08:11,997 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=108, PETRI_TRANSITIONS=111} [2022-11-25 17:08:11,998 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, -9 predicate places. [2022-11-25 17:08:11,998 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 111 transitions, 234 flow [2022-11-25 17:08:11,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:11,999 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:11,999 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:08:11,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:08:11,999 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2022-11-25 17:08:12,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:12,000 INFO L85 PathProgramCache]: Analyzing trace with hash 44934, now seen corresponding path program 1 times [2022-11-25 17:08:12,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:12,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252763671] [2022-11-25 17:08:12,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:12,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:08:12,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:12,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252763671] [2022-11-25 17:08:12,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252763671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:08:12,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:08:12,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:08:12,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003055765] [2022-11-25 17:08:12,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:08:12,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:08:12,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:12,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:08:12,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:08:12,166 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 458 [2022-11-25 17:08:12,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 111 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:12,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:12,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 458 [2022-11-25 17:08:12,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:08:14,256 INFO L130 PetriNetUnfolder]: 5540/9618 cut-off events. [2022-11-25 17:08:14,257 INFO L131 PetriNetUnfolder]: For 119/119 co-relation queries the response was YES. [2022-11-25 17:08:14,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18753 conditions, 9618 events. 5540/9618 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 1369. Compared 82950 event pairs, 4483 based on Foata normal form. 0/4088 useless extension candidates. Maximal degree in co-relation 18745. Up to 7961 conditions per place. [2022-11-25 17:08:14,328 INFO L137 encePairwiseOnDemand]: 447/458 looper letters, 171 selfloop transitions, 10 changer transitions 0/200 dead transitions. [2022-11-25 17:08:14,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 200 transitions, 779 flow [2022-11-25 17:08:14,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:08:14,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:08:14,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 668 transitions. [2022-11-25 17:08:14,332 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4861717612809316 [2022-11-25 17:08:14,332 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 668 transitions. [2022-11-25 17:08:14,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 668 transitions. [2022-11-25 17:08:14,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:08:14,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 668 transitions. [2022-11-25 17:08:14,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:14,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:14,339 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:14,340 INFO L175 Difference]: Start difference. First operand has 108 places, 111 transitions, 234 flow. Second operand 3 states and 668 transitions. [2022-11-25 17:08:14,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 200 transitions, 779 flow [2022-11-25 17:08:14,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 200 transitions, 778 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:08:14,347 INFO L231 Difference]: Finished difference. Result has 111 places, 120 transitions, 311 flow [2022-11-25 17:08:14,348 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=311, PETRI_PLACES=111, PETRI_TRANSITIONS=120} [2022-11-25 17:08:14,349 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, -6 predicate places. [2022-11-25 17:08:14,350 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 120 transitions, 311 flow [2022-11-25 17:08:14,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:14,350 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:14,350 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:08:14,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:08:14,351 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2022-11-25 17:08:14,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:14,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1339737295, now seen corresponding path program 1 times [2022-11-25 17:08:14,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:14,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077727038] [2022-11-25 17:08:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:14,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:08:14,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:14,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077727038] [2022-11-25 17:08:14,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077727038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:08:14,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:08:14,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:08:14,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050826351] [2022-11-25 17:08:14,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:08:14,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:08:14,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:14,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:08:14,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:08:14,710 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 458 [2022-11-25 17:08:14,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 120 transitions, 311 flow. Second operand has 5 states, 5 states have (on average 155.0) internal successors, (775), 5 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:14,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:14,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 458 [2022-11-25 17:08:14,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:08:16,819 INFO L130 PetriNetUnfolder]: 4751/8432 cut-off events. [2022-11-25 17:08:16,819 INFO L131 PetriNetUnfolder]: For 2779/2786 co-relation queries the response was YES. [2022-11-25 17:08:16,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19410 conditions, 8432 events. 4751/8432 cut-off events. For 2779/2786 co-relation queries the response was YES. Maximal size of possible extension queue 1236. Compared 73520 event pairs, 3526 based on Foata normal form. 3/4018 useless extension candidates. Maximal degree in co-relation 19399. Up to 6233 conditions per place. [2022-11-25 17:08:16,878 INFO L137 encePairwiseOnDemand]: 398/458 looper letters, 208 selfloop transitions, 64 changer transitions 0/287 dead transitions. [2022-11-25 17:08:16,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 287 transitions, 1284 flow [2022-11-25 17:08:16,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:08:16,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:08:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 894 transitions. [2022-11-25 17:08:16,881 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48799126637554585 [2022-11-25 17:08:16,881 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 894 transitions. [2022-11-25 17:08:16,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 894 transitions. [2022-11-25 17:08:16,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:08:16,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 894 transitions. [2022-11-25 17:08:16,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 223.5) internal successors, (894), 4 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:16,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 458.0) internal successors, (2290), 5 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:16,889 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 458.0) internal successors, (2290), 5 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:16,889 INFO L175 Difference]: Start difference. First operand has 111 places, 120 transitions, 311 flow. Second operand 4 states and 894 transitions. [2022-11-25 17:08:16,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 287 transitions, 1284 flow [2022-11-25 17:08:16,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 287 transitions, 1230 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:08:16,907 INFO L231 Difference]: Finished difference. Result has 115 places, 183 transitions, 879 flow [2022-11-25 17:08:16,907 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=879, PETRI_PLACES=115, PETRI_TRANSITIONS=183} [2022-11-25 17:08:16,909 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, -2 predicate places. [2022-11-25 17:08:16,910 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 183 transitions, 879 flow [2022-11-25 17:08:16,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 155.0) internal successors, (775), 5 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:16,912 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:16,912 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:08:16,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:08:16,913 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2022-11-25 17:08:16,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:16,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1339737296, now seen corresponding path program 1 times [2022-11-25 17:08:16,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:16,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170014610] [2022-11-25 17:08:16,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:16,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:08:17,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:17,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170014610] [2022-11-25 17:08:17,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170014610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:08:17,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:08:17,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:08:17,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886109909] [2022-11-25 17:08:17,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:08:17,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:08:17,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:17,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:08:17,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:08:17,243 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 458 [2022-11-25 17:08:17,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 183 transitions, 879 flow. Second operand has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:17,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:17,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 458 [2022-11-25 17:08:17,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:08:18,603 INFO L130 PetriNetUnfolder]: 3837/6740 cut-off events. [2022-11-25 17:08:18,603 INFO L131 PetriNetUnfolder]: For 3012/3016 co-relation queries the response was YES. [2022-11-25 17:08:18,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19156 conditions, 6740 events. 3837/6740 cut-off events. For 3012/3016 co-relation queries the response was YES. Maximal size of possible extension queue 963. Compared 56117 event pairs, 2951 based on Foata normal form. 566/4097 useless extension candidates. Maximal degree in co-relation 19142. Up to 6313 conditions per place. [2022-11-25 17:08:18,657 INFO L137 encePairwiseOnDemand]: 445/458 looper letters, 155 selfloop transitions, 1 changer transitions 0/171 dead transitions. [2022-11-25 17:08:18,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 171 transitions, 1167 flow [2022-11-25 17:08:18,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:08:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:08:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 600 transitions. [2022-11-25 17:08:18,661 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4366812227074236 [2022-11-25 17:08:18,661 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 600 transitions. [2022-11-25 17:08:18,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 600 transitions. [2022-11-25 17:08:18,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:08:18,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 600 transitions. [2022-11-25 17:08:18,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:18,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:18,666 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:18,667 INFO L175 Difference]: Start difference. First operand has 115 places, 183 transitions, 879 flow. Second operand 3 states and 600 transitions. [2022-11-25 17:08:18,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 171 transitions, 1167 flow [2022-11-25 17:08:18,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 171 transitions, 1167 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:08:18,688 INFO L231 Difference]: Finished difference. Result has 105 places, 171 transitions, 857 flow [2022-11-25 17:08:18,689 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=857, PETRI_PLACES=105, PETRI_TRANSITIONS=171} [2022-11-25 17:08:18,690 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, -12 predicate places. [2022-11-25 17:08:18,690 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 171 transitions, 857 flow [2022-11-25 17:08:18,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:18,691 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:18,691 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:08:18,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:08:18,691 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2022-11-25 17:08:18,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:18,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1417808628, now seen corresponding path program 1 times [2022-11-25 17:08:18,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:18,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053802615] [2022-11-25 17:08:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:18,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:08:18,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:18,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053802615] [2022-11-25 17:08:18,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053802615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:08:18,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:08:18,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:08:18,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862448958] [2022-11-25 17:08:18,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:08:18,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:08:18,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:18,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:08:18,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:08:18,859 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 458 [2022-11-25 17:08:18,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 171 transitions, 857 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:18,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:18,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 458 [2022-11-25 17:08:18,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:08:20,446 INFO L130 PetriNetUnfolder]: 3669/6402 cut-off events. [2022-11-25 17:08:20,446 INFO L131 PetriNetUnfolder]: For 2923/2927 co-relation queries the response was YES. [2022-11-25 17:08:20,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18352 conditions, 6402 events. 3669/6402 cut-off events. For 2923/2927 co-relation queries the response was YES. Maximal size of possible extension queue 927. Compared 54806 event pairs, 1571 based on Foata normal form. 0/3441 useless extension candidates. Maximal degree in co-relation 18336. Up to 3842 conditions per place. [2022-11-25 17:08:20,505 INFO L137 encePairwiseOnDemand]: 445/458 looper letters, 197 selfloop transitions, 17 changer transitions 0/228 dead transitions. [2022-11-25 17:08:20,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 228 transitions, 1518 flow [2022-11-25 17:08:20,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:08:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:08:20,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2022-11-25 17:08:20,509 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45487627365356625 [2022-11-25 17:08:20,509 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2022-11-25 17:08:20,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2022-11-25 17:08:20,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:08:20,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2022-11-25 17:08:20,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:20,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:20,516 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:20,517 INFO L175 Difference]: Start difference. First operand has 105 places, 171 transitions, 857 flow. Second operand 3 states and 625 transitions. [2022-11-25 17:08:20,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 228 transitions, 1518 flow [2022-11-25 17:08:20,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 228 transitions, 1517 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:08:20,538 INFO L231 Difference]: Finished difference. Result has 108 places, 182 transitions, 1020 flow [2022-11-25 17:08:20,540 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1020, PETRI_PLACES=108, PETRI_TRANSITIONS=182} [2022-11-25 17:08:20,540 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, -9 predicate places. [2022-11-25 17:08:20,541 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 182 transitions, 1020 flow [2022-11-25 17:08:20,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:20,541 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:20,541 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:08:20,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 17:08:20,544 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2022-11-25 17:08:20,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:20,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1417808625, now seen corresponding path program 1 times [2022-11-25 17:08:20,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:20,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709259042] [2022-11-25 17:08:20,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:20,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:08:20,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:20,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709259042] [2022-11-25 17:08:20,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709259042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:08:20,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:08:20,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:08:20,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808968096] [2022-11-25 17:08:20,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:08:20,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:08:20,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:20,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:08:20,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:08:20,822 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 458 [2022-11-25 17:08:20,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 182 transitions, 1020 flow. Second operand has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:20,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:20,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 458 [2022-11-25 17:08:20,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:08:22,312 INFO L130 PetriNetUnfolder]: 3687/6583 cut-off events. [2022-11-25 17:08:22,312 INFO L131 PetriNetUnfolder]: For 4897/4913 co-relation queries the response was YES. [2022-11-25 17:08:22,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19860 conditions, 6583 events. 3687/6583 cut-off events. For 4897/4913 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 56192 event pairs, 1149 based on Foata normal form. 0/3608 useless extension candidates. Maximal degree in co-relation 19843. Up to 4988 conditions per place. [2022-11-25 17:08:22,358 INFO L137 encePairwiseOnDemand]: 444/458 looper letters, 232 selfloop transitions, 13 changer transitions 0/260 dead transitions. [2022-11-25 17:08:22,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 260 transitions, 1939 flow [2022-11-25 17:08:22,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:08:22,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:08:22,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 642 transitions. [2022-11-25 17:08:22,361 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4672489082969432 [2022-11-25 17:08:22,361 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 642 transitions. [2022-11-25 17:08:22,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 642 transitions. [2022-11-25 17:08:22,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:08:22,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 642 transitions. [2022-11-25 17:08:22,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:22,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:22,368 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:22,368 INFO L175 Difference]: Start difference. First operand has 108 places, 182 transitions, 1020 flow. Second operand 3 states and 642 transitions. [2022-11-25 17:08:22,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 260 transitions, 1939 flow [2022-11-25 17:08:22,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 260 transitions, 1897 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:08:22,405 INFO L231 Difference]: Finished difference. Result has 109 places, 194 transitions, 1137 flow [2022-11-25 17:08:22,406 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1137, PETRI_PLACES=109, PETRI_TRANSITIONS=194} [2022-11-25 17:08:22,406 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, -8 predicate places. [2022-11-25 17:08:22,406 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 194 transitions, 1137 flow [2022-11-25 17:08:22,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:22,407 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:22,407 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:08:22,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 17:08:22,408 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2022-11-25 17:08:22,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:22,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1417805611, now seen corresponding path program 1 times [2022-11-25 17:08:22,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:22,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430919798] [2022-11-25 17:08:22,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:22,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:08:22,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:22,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430919798] [2022-11-25 17:08:22,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430919798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:08:22,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:08:22,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:08:22,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906502511] [2022-11-25 17:08:22,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:08:22,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:08:22,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:22,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:08:22,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:08:22,604 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 458 [2022-11-25 17:08:22,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 194 transitions, 1137 flow. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:22,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:22,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 458 [2022-11-25 17:08:22,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:08:23,690 INFO L130 PetriNetUnfolder]: 3364/5967 cut-off events. [2022-11-25 17:08:23,690 INFO L131 PetriNetUnfolder]: For 4299/4317 co-relation queries the response was YES. [2022-11-25 17:08:23,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18910 conditions, 5967 events. 3364/5967 cut-off events. For 4299/4317 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 50841 event pairs, 1156 based on Foata normal form. 0/3819 useless extension candidates. Maximal degree in co-relation 18891. Up to 2973 conditions per place. [2022-11-25 17:08:23,730 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 204 selfloop transitions, 11 changer transitions 0/229 dead transitions. [2022-11-25 17:08:23,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 229 transitions, 1721 flow [2022-11-25 17:08:23,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:08:23,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:08:23,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 636 transitions. [2022-11-25 17:08:23,733 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.462882096069869 [2022-11-25 17:08:23,734 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 636 transitions. [2022-11-25 17:08:23,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 636 transitions. [2022-11-25 17:08:23,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:08:23,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 636 transitions. [2022-11-25 17:08:23,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:23,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:23,739 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:23,740 INFO L175 Difference]: Start difference. First operand has 109 places, 194 transitions, 1137 flow. Second operand 3 states and 636 transitions. [2022-11-25 17:08:23,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 229 transitions, 1721 flow [2022-11-25 17:08:23,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 229 transitions, 1707 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:08:23,771 INFO L231 Difference]: Finished difference. Result has 107 places, 187 transitions, 1106 flow [2022-11-25 17:08:23,772 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1106, PETRI_PLACES=107, PETRI_TRANSITIONS=187} [2022-11-25 17:08:23,772 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, -10 predicate places. [2022-11-25 17:08:23,772 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 187 transitions, 1106 flow [2022-11-25 17:08:23,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:23,773 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:23,773 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:08:23,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 17:08:23,773 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2022-11-25 17:08:23,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:23,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1417805616, now seen corresponding path program 1 times [2022-11-25 17:08:23,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:23,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147335985] [2022-11-25 17:08:23,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:23,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:23,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:08:23,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:23,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147335985] [2022-11-25 17:08:23,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147335985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:08:23,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:08:23,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:08:23,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749815537] [2022-11-25 17:08:23,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:08:23,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:08:23,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:23,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:08:23,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:08:24,034 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 458 [2022-11-25 17:08:24,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 187 transitions, 1106 flow. Second operand has 4 states, 4 states have (on average 164.5) internal successors, (658), 4 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:24,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:24,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 458 [2022-11-25 17:08:24,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:08:25,169 INFO L130 PetriNetUnfolder]: 2983/5403 cut-off events. [2022-11-25 17:08:25,169 INFO L131 PetriNetUnfolder]: For 4446/4474 co-relation queries the response was YES. [2022-11-25 17:08:25,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17134 conditions, 5403 events. 2983/5403 cut-off events. For 4446/4474 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 44425 event pairs, 1908 based on Foata normal form. 2/3548 useless extension candidates. Maximal degree in co-relation 17115. Up to 3320 conditions per place. [2022-11-25 17:08:25,206 INFO L137 encePairwiseOnDemand]: 445/458 looper letters, 222 selfloop transitions, 13 changer transitions 0/249 dead transitions. [2022-11-25 17:08:25,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 249 transitions, 1827 flow [2022-11-25 17:08:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:08:25,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:08:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 640 transitions. [2022-11-25 17:08:25,209 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4657933042212518 [2022-11-25 17:08:25,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 640 transitions. [2022-11-25 17:08:25,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 640 transitions. [2022-11-25 17:08:25,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:08:25,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 640 transitions. [2022-11-25 17:08:25,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:25,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:25,215 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:25,216 INFO L175 Difference]: Start difference. First operand has 107 places, 187 transitions, 1106 flow. Second operand 3 states and 640 transitions. [2022-11-25 17:08:25,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 249 transitions, 1827 flow [2022-11-25 17:08:25,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 249 transitions, 1803 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:08:25,244 INFO L231 Difference]: Finished difference. Result has 108 places, 187 transitions, 1131 flow [2022-11-25 17:08:25,245 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1131, PETRI_PLACES=108, PETRI_TRANSITIONS=187} [2022-11-25 17:08:25,245 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, -9 predicate places. [2022-11-25 17:08:25,245 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 187 transitions, 1131 flow [2022-11-25 17:08:25,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.5) internal successors, (658), 4 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:25,246 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:25,246 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:08:25,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 17:08:25,246 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2022-11-25 17:08:25,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:25,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1417805615, now seen corresponding path program 1 times [2022-11-25 17:08:25,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:25,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368232886] [2022-11-25 17:08:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:25,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:08:25,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:25,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368232886] [2022-11-25 17:08:25,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368232886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:08:25,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:08:25,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:08:25,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483910740] [2022-11-25 17:08:25,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:08:25,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:08:25,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:25,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:08:25,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:08:25,555 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 458 [2022-11-25 17:08:25,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 187 transitions, 1131 flow. Second operand has 4 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:25,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:25,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 458 [2022-11-25 17:08:25,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:08:26,603 INFO L130 PetriNetUnfolder]: 2590/4706 cut-off events. [2022-11-25 17:08:26,603 INFO L131 PetriNetUnfolder]: For 4848/4870 co-relation queries the response was YES. [2022-11-25 17:08:26,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15637 conditions, 4706 events. 2590/4706 cut-off events. For 4848/4870 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 37901 event pairs, 1681 based on Foata normal form. 0/3283 useless extension candidates. Maximal degree in co-relation 15616. Up to 4396 conditions per place. [2022-11-25 17:08:26,633 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 166 selfloop transitions, 1 changer transitions 0/181 dead transitions. [2022-11-25 17:08:26,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 181 transitions, 1441 flow [2022-11-25 17:08:26,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:08:26,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:08:26,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2022-11-25 17:08:26,636 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43740902474526927 [2022-11-25 17:08:26,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2022-11-25 17:08:26,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2022-11-25 17:08:26,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:08:26,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2022-11-25 17:08:26,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:26,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:26,642 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:26,642 INFO L175 Difference]: Start difference. First operand has 108 places, 187 transitions, 1131 flow. Second operand 3 states and 601 transitions. [2022-11-25 17:08:26,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 181 transitions, 1441 flow [2022-11-25 17:08:26,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 181 transitions, 1415 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:08:26,662 INFO L231 Difference]: Finished difference. Result has 104 places, 181 transitions, 1083 flow [2022-11-25 17:08:26,662 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1083, PETRI_PLACES=104, PETRI_TRANSITIONS=181} [2022-11-25 17:08:26,663 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, -13 predicate places. [2022-11-25 17:08:26,664 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 181 transitions, 1083 flow [2022-11-25 17:08:26,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:26,664 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:26,665 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:08:26,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 17:08:26,665 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2022-11-25 17:08:26,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:26,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1417805610, now seen corresponding path program 1 times [2022-11-25 17:08:26,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:26,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534669023] [2022-11-25 17:08:26,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:26,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:08:26,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:26,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534669023] [2022-11-25 17:08:26,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534669023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:08:26,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:08:26,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:08:26,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237380492] [2022-11-25 17:08:26,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:08:26,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:08:26,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:26,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:08:26,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:08:26,810 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 458 [2022-11-25 17:08:26,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 181 transitions, 1083 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:26,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:26,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 458 [2022-11-25 17:08:26,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:08:27,677 INFO L130 PetriNetUnfolder]: 2369/4308 cut-off events. [2022-11-25 17:08:27,678 INFO L131 PetriNetUnfolder]: For 3480/3500 co-relation queries the response was YES. [2022-11-25 17:08:27,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14156 conditions, 4308 events. 2369/4308 cut-off events. For 3480/3500 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 35384 event pairs, 890 based on Foata normal form. 90/3148 useless extension candidates. Maximal degree in co-relation 14135. Up to 2506 conditions per place. [2022-11-25 17:08:27,704 INFO L137 encePairwiseOnDemand]: 445/458 looper letters, 203 selfloop transitions, 19 changer transitions 0/235 dead transitions. [2022-11-25 17:08:27,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 235 transitions, 1794 flow [2022-11-25 17:08:27,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:08:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:08:27,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2022-11-25 17:08:27,708 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44541484716157204 [2022-11-25 17:08:27,709 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2022-11-25 17:08:27,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2022-11-25 17:08:27,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:08:27,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2022-11-25 17:08:27,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:27,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:27,714 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:27,715 INFO L175 Difference]: Start difference. First operand has 104 places, 181 transitions, 1083 flow. Second operand 3 states and 612 transitions. [2022-11-25 17:08:27,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 235 transitions, 1794 flow [2022-11-25 17:08:27,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 235 transitions, 1793 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:08:27,742 INFO L231 Difference]: Finished difference. Result has 107 places, 193 transitions, 1278 flow [2022-11-25 17:08:27,742 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1278, PETRI_PLACES=107, PETRI_TRANSITIONS=193} [2022-11-25 17:08:27,742 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, -10 predicate places. [2022-11-25 17:08:27,743 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 193 transitions, 1278 flow [2022-11-25 17:08:27,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:27,743 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:27,743 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:08:27,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 17:08:27,744 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2022-11-25 17:08:27,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:27,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1006514103, now seen corresponding path program 1 times [2022-11-25 17:08:27,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:27,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091827306] [2022-11-25 17:08:27,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:27,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:08:27,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:27,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091827306] [2022-11-25 17:08:27,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091827306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:08:27,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:08:27,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:08:27,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880580081] [2022-11-25 17:08:27,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:08:27,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:08:27,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:27,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:08:27,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:08:28,145 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 458 [2022-11-25 17:08:28,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 193 transitions, 1278 flow. Second operand has 6 states, 6 states have (on average 157.33333333333334) internal successors, (944), 6 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:28,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:28,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 458 [2022-11-25 17:08:28,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:08:29,119 INFO L130 PetriNetUnfolder]: 2147/4000 cut-off events. [2022-11-25 17:08:29,120 INFO L131 PetriNetUnfolder]: For 5125/5155 co-relation queries the response was YES. [2022-11-25 17:08:29,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13911 conditions, 4000 events. 2147/4000 cut-off events. For 5125/5155 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 32232 event pairs, 1242 based on Foata normal form. 2/2931 useless extension candidates. Maximal degree in co-relation 13889. Up to 2070 conditions per place. [2022-11-25 17:08:29,151 INFO L137 encePairwiseOnDemand]: 435/458 looper letters, 194 selfloop transitions, 43 changer transitions 0/251 dead transitions. [2022-11-25 17:08:29,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 251 transitions, 2011 flow [2022-11-25 17:08:29,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:08:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:08:29,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 765 transitions. [2022-11-25 17:08:29,164 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4175764192139738 [2022-11-25 17:08:29,164 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 765 transitions. [2022-11-25 17:08:29,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 765 transitions. [2022-11-25 17:08:29,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:08:29,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 765 transitions. [2022-11-25 17:08:29,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 191.25) internal successors, (765), 4 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:29,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 458.0) internal successors, (2290), 5 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:29,171 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 458.0) internal successors, (2290), 5 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:29,171 INFO L175 Difference]: Start difference. First operand has 107 places, 193 transitions, 1278 flow. Second operand 4 states and 765 transitions. [2022-11-25 17:08:29,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 251 transitions, 2011 flow [2022-11-25 17:08:29,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 251 transitions, 1963 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-25 17:08:29,191 INFO L231 Difference]: Finished difference. Result has 111 places, 204 transitions, 1490 flow [2022-11-25 17:08:29,192 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1490, PETRI_PLACES=111, PETRI_TRANSITIONS=204} [2022-11-25 17:08:29,192 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, -6 predicate places. [2022-11-25 17:08:29,193 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 204 transitions, 1490 flow [2022-11-25 17:08:29,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 157.33333333333334) internal successors, (944), 6 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:29,193 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:29,194 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:08:29,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 17:08:29,194 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2022-11-25 17:08:29,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:29,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1006514102, now seen corresponding path program 1 times [2022-11-25 17:08:29,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:29,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099374290] [2022-11-25 17:08:29,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:29,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:08:29,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:29,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099374290] [2022-11-25 17:08:29,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099374290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:08:29,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:08:29,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:08:29,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903531463] [2022-11-25 17:08:29,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:08:29,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:08:29,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:29,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:08:29,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:08:29,839 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 458 [2022-11-25 17:08:29,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 204 transitions, 1490 flow. Second operand has 6 states, 6 states have (on average 168.33333333333334) internal successors, (1010), 6 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:29,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:29,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 458 [2022-11-25 17:08:29,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:08:30,674 INFO L130 PetriNetUnfolder]: 1915/3586 cut-off events. [2022-11-25 17:08:30,675 INFO L131 PetriNetUnfolder]: For 6279/6305 co-relation queries the response was YES. [2022-11-25 17:08:30,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13367 conditions, 3586 events. 1915/3586 cut-off events. For 6279/6305 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 28533 event pairs, 1144 based on Foata normal form. 120/2919 useless extension candidates. Maximal degree in co-relation 13341. Up to 3327 conditions per place. [2022-11-25 17:08:30,707 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 183 selfloop transitions, 1 changer transitions 0/198 dead transitions. [2022-11-25 17:08:30,708 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 198 transitions, 1830 flow [2022-11-25 17:08:30,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:08:30,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:08:30,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 579 transitions. [2022-11-25 17:08:30,710 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42139737991266374 [2022-11-25 17:08:30,710 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 579 transitions. [2022-11-25 17:08:30,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 579 transitions. [2022-11-25 17:08:30,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:08:30,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 579 transitions. [2022-11-25 17:08:30,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:30,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:30,731 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:30,731 INFO L175 Difference]: Start difference. First operand has 111 places, 204 transitions, 1490 flow. Second operand 3 states and 579 transitions. [2022-11-25 17:08:30,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 198 transitions, 1830 flow [2022-11-25 17:08:30,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 198 transitions, 1813 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:08:30,758 INFO L231 Difference]: Finished difference. Result has 108 places, 198 transitions, 1447 flow [2022-11-25 17:08:30,758 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1447, PETRI_PLACES=108, PETRI_TRANSITIONS=198} [2022-11-25 17:08:30,759 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, -9 predicate places. [2022-11-25 17:08:30,759 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 198 transitions, 1447 flow [2022-11-25 17:08:30,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 168.33333333333334) internal successors, (1010), 6 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:30,760 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:30,760 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:08:30,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 17:08:30,761 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thr1Err18ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2022-11-25 17:08:30,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:30,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1006514099, now seen corresponding path program 1 times [2022-11-25 17:08:30,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:30,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049976259] [2022-11-25 17:08:30,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:30,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:08:31,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:31,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049976259] [2022-11-25 17:08:31,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049976259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:08:31,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:08:31,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 17:08:31,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82497772] [2022-11-25 17:08:31,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:08:31,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:08:31,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:31,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:08:31,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:08:32,287 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 458 [2022-11-25 17:08:32,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 198 transitions, 1447 flow. Second operand has 8 states, 8 states have (on average 143.0) internal successors, (1144), 8 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:32,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:32,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 458 [2022-11-25 17:08:32,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:08:34,724 INFO L130 PetriNetUnfolder]: 3245/5793 cut-off events. [2022-11-25 17:08:34,725 INFO L131 PetriNetUnfolder]: For 8242/8248 co-relation queries the response was YES. [2022-11-25 17:08:34,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22078 conditions, 5793 events. 3245/5793 cut-off events. For 8242/8248 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 47053 event pairs, 590 based on Foata normal form. 58/4585 useless extension candidates. Maximal degree in co-relation 22051. Up to 3405 conditions per place. [2022-11-25 17:08:34,753 INFO L137 encePairwiseOnDemand]: 435/458 looper letters, 398 selfloop transitions, 109 changer transitions 0/516 dead transitions. [2022-11-25 17:08:34,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 516 transitions, 4340 flow [2022-11-25 17:08:34,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:08:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:08:34,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2334 transitions. [2022-11-25 17:08:34,761 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3640049906425452 [2022-11-25 17:08:34,762 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2334 transitions. [2022-11-25 17:08:34,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2334 transitions. [2022-11-25 17:08:34,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:08:34,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2334 transitions. [2022-11-25 17:08:34,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 166.71428571428572) internal successors, (2334), 14 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:34,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:34,780 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:34,780 INFO L175 Difference]: Start difference. First operand has 108 places, 198 transitions, 1447 flow. Second operand 14 states and 2334 transitions. [2022-11-25 17:08:34,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 516 transitions, 4340 flow [2022-11-25 17:08:34,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 516 transitions, 4339 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:08:34,832 INFO L231 Difference]: Finished difference. Result has 130 places, 304 transitions, 2760 flow [2022-11-25 17:08:34,832 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2760, PETRI_PLACES=130, PETRI_TRANSITIONS=304} [2022-11-25 17:08:34,833 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, 13 predicate places. [2022-11-25 17:08:34,833 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 304 transitions, 2760 flow [2022-11-25 17:08:34,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 143.0) internal successors, (1144), 8 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:34,833 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:34,834 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:08:34,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 17:08:34,834 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2022-11-25 17:08:34,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:34,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1221979409, now seen corresponding path program 1 times [2022-11-25 17:08:34,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:34,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121361164] [2022-11-25 17:08:34,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:34,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:34,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:08:34,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:34,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121361164] [2022-11-25 17:08:34,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121361164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:08:34,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:08:34,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:08:34,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769560095] [2022-11-25 17:08:34,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:08:34,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:08:34,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:34,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:08:34,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:08:35,055 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 458 [2022-11-25 17:08:35,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 304 transitions, 2760 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:35,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:35,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 458 [2022-11-25 17:08:35,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:08:36,789 INFO L130 PetriNetUnfolder]: 3191/5776 cut-off events. [2022-11-25 17:08:36,790 INFO L131 PetriNetUnfolder]: For 19179/19228 co-relation queries the response was YES. [2022-11-25 17:08:36,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27088 conditions, 5776 events. 3191/5776 cut-off events. For 19179/19228 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 46896 event pairs, 1190 based on Foata normal form. 57/5085 useless extension candidates. Maximal degree in co-relation 27050. Up to 3187 conditions per place. [2022-11-25 17:08:36,836 INFO L137 encePairwiseOnDemand]: 443/458 looper letters, 374 selfloop transitions, 80 changer transitions 0/467 dead transitions. [2022-11-25 17:08:36,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 467 transitions, 4736 flow [2022-11-25 17:08:36,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:08:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:08:36,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 816 transitions. [2022-11-25 17:08:36,841 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44541484716157204 [2022-11-25 17:08:36,841 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 816 transitions. [2022-11-25 17:08:36,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 816 transitions. [2022-11-25 17:08:36,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:08:36,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 816 transitions. [2022-11-25 17:08:36,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:36,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 458.0) internal successors, (2290), 5 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:36,847 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 458.0) internal successors, (2290), 5 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:36,847 INFO L175 Difference]: Start difference. First operand has 130 places, 304 transitions, 2760 flow. Second operand 4 states and 816 transitions. [2022-11-25 17:08:36,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 467 transitions, 4736 flow [2022-11-25 17:08:36,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 467 transitions, 4728 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-25 17:08:36,969 INFO L231 Difference]: Finished difference. Result has 135 places, 322 transitions, 3229 flow [2022-11-25 17:08:36,970 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=2752, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3229, PETRI_PLACES=135, PETRI_TRANSITIONS=322} [2022-11-25 17:08:36,970 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, 18 predicate places. [2022-11-25 17:08:36,970 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 322 transitions, 3229 flow [2022-11-25 17:08:36,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:36,971 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:36,971 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:08:36,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-25 17:08:36,972 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2022-11-25 17:08:36,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:36,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1752150915, now seen corresponding path program 1 times [2022-11-25 17:08:36,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:36,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221652387] [2022-11-25 17:08:36,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:36,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:08:37,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:37,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221652387] [2022-11-25 17:08:37,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221652387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:08:37,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:08:37,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:08:37,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535045849] [2022-11-25 17:08:37,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:08:37,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:08:37,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:37,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:08:37,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:08:37,105 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 458 [2022-11-25 17:08:37,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 322 transitions, 3229 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:37,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:37,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 458 [2022-11-25 17:08:37,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:08:38,844 INFO L130 PetriNetUnfolder]: 3029/5538 cut-off events. [2022-11-25 17:08:38,845 INFO L131 PetriNetUnfolder]: For 26391/26441 co-relation queries the response was YES. [2022-11-25 17:08:38,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27894 conditions, 5538 events. 3029/5538 cut-off events. For 26391/26441 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 45135 event pairs, 1028 based on Foata normal form. 0/4956 useless extension candidates. Maximal degree in co-relation 27852. Up to 3427 conditions per place. [2022-11-25 17:08:38,911 INFO L137 encePairwiseOnDemand]: 445/458 looper letters, 331 selfloop transitions, 32 changer transitions 0/377 dead transitions. [2022-11-25 17:08:38,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 377 transitions, 4437 flow [2022-11-25 17:08:38,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:08:38,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:08:38,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 599 transitions. [2022-11-25 17:08:38,914 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4359534206695779 [2022-11-25 17:08:38,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 599 transitions. [2022-11-25 17:08:38,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 599 transitions. [2022-11-25 17:08:38,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:08:38,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 599 transitions. [2022-11-25 17:08:38,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:38,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:38,919 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:38,920 INFO L175 Difference]: Start difference. First operand has 135 places, 322 transitions, 3229 flow. Second operand 3 states and 599 transitions. [2022-11-25 17:08:38,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 377 transitions, 4437 flow [2022-11-25 17:08:39,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 377 transitions, 4437 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:08:39,039 INFO L231 Difference]: Finished difference. Result has 139 places, 332 transitions, 3563 flow [2022-11-25 17:08:39,039 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=3164, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3563, PETRI_PLACES=139, PETRI_TRANSITIONS=332} [2022-11-25 17:08:39,040 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, 22 predicate places. [2022-11-25 17:08:39,040 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 332 transitions, 3563 flow [2022-11-25 17:08:39,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:39,040 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:39,040 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:08:39,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-25 17:08:39,041 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2022-11-25 17:08:39,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:39,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1752150910, now seen corresponding path program 1 times [2022-11-25 17:08:39,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:39,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133018538] [2022-11-25 17:08:39,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:39,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:08:39,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:39,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133018538] [2022-11-25 17:08:39,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133018538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:08:39,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:08:39,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:08:39,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188871882] [2022-11-25 17:08:39,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:08:39,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:08:39,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:39,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:08:39,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:08:39,195 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 458 [2022-11-25 17:08:39,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 332 transitions, 3563 flow. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:39,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:39,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 458 [2022-11-25 17:08:39,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:08:40,540 INFO L130 PetriNetUnfolder]: 2731/5021 cut-off events. [2022-11-25 17:08:40,540 INFO L131 PetriNetUnfolder]: For 29685/29738 co-relation queries the response was YES. [2022-11-25 17:08:40,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26463 conditions, 5021 events. 2731/5021 cut-off events. For 29685/29738 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 40555 event pairs, 1019 based on Foata normal form. 228/4892 useless extension candidates. Maximal degree in co-relation 26419. Up to 2983 conditions per place. [2022-11-25 17:08:40,582 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 308 selfloop transitions, 28 changer transitions 0/350 dead transitions. [2022-11-25 17:08:40,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 350 transitions, 4345 flow [2022-11-25 17:08:40,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:08:40,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:08:40,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2022-11-25 17:08:40,584 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44541484716157204 [2022-11-25 17:08:40,585 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2022-11-25 17:08:40,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2022-11-25 17:08:40,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:08:40,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2022-11-25 17:08:40,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:40,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:40,589 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:40,590 INFO L175 Difference]: Start difference. First operand has 139 places, 332 transitions, 3563 flow. Second operand 3 states and 612 transitions. [2022-11-25 17:08:40,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 350 transitions, 4345 flow [2022-11-25 17:08:40,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 350 transitions, 4281 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:08:40,689 INFO L231 Difference]: Finished difference. Result has 136 places, 316 transitions, 3424 flow [2022-11-25 17:08:40,690 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3424, PETRI_PLACES=136, PETRI_TRANSITIONS=316} [2022-11-25 17:08:40,690 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, 19 predicate places. [2022-11-25 17:08:40,691 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 316 transitions, 3424 flow [2022-11-25 17:08:40,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:40,691 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:40,691 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:08:40,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-25 17:08:40,692 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2022-11-25 17:08:40,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:40,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1752154925, now seen corresponding path program 1 times [2022-11-25 17:08:40,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:40,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166698717] [2022-11-25 17:08:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:40,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:08:40,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:40,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166698717] [2022-11-25 17:08:40,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166698717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:08:40,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:08:40,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:08:40,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771989280] [2022-11-25 17:08:40,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:08:40,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:08:40,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:40,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:08:40,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:08:40,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 458 [2022-11-25 17:08:40,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 316 transitions, 3424 flow. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:40,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:40,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 458 [2022-11-25 17:08:40,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:08:41,848 INFO L130 PetriNetUnfolder]: 2574/4729 cut-off events. [2022-11-25 17:08:41,848 INFO L131 PetriNetUnfolder]: For 27455/27509 co-relation queries the response was YES. [2022-11-25 17:08:41,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24894 conditions, 4729 events. 2574/4729 cut-off events. For 27455/27509 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 37782 event pairs, 885 based on Foata normal form. 0/4509 useless extension candidates. Maximal degree in co-relation 24850. Up to 3150 conditions per place. [2022-11-25 17:08:41,887 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 299 selfloop transitions, 23 changer transitions 0/335 dead transitions. [2022-11-25 17:08:41,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 335 transitions, 4283 flow [2022-11-25 17:08:41,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:08:41,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:08:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2022-11-25 17:08:41,889 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43740902474526927 [2022-11-25 17:08:41,890 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2022-11-25 17:08:41,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2022-11-25 17:08:41,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:08:41,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2022-11-25 17:08:41,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:41,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:41,895 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:41,895 INFO L175 Difference]: Start difference. First operand has 136 places, 316 transitions, 3424 flow. Second operand 3 states and 601 transitions. [2022-11-25 17:08:41,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 335 transitions, 4283 flow [2022-11-25 17:08:41,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 335 transitions, 4227 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:08:42,005 INFO L231 Difference]: Finished difference. Result has 133 places, 306 transitions, 3313 flow [2022-11-25 17:08:42,006 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=3267, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3313, PETRI_PLACES=133, PETRI_TRANSITIONS=306} [2022-11-25 17:08:42,006 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, 16 predicate places. [2022-11-25 17:08:42,006 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 306 transitions, 3313 flow [2022-11-25 17:08:42,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:42,007 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:42,007 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:08:42,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-25 17:08:42,007 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2022-11-25 17:08:42,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:42,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1752154926, now seen corresponding path program 1 times [2022-11-25 17:08:42,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:42,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054840205] [2022-11-25 17:08:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:42,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:08:42,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:42,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054840205] [2022-11-25 17:08:42,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054840205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:08:42,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:08:42,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:08:42,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453780593] [2022-11-25 17:08:42,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:08:42,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:08:42,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:42,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:08:42,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:08:42,142 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 458 [2022-11-25 17:08:42,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 306 transitions, 3313 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:42,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:42,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 458 [2022-11-25 17:08:42,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:08:43,151 INFO L130 PetriNetUnfolder]: 2498/4615 cut-off events. [2022-11-25 17:08:43,151 INFO L131 PetriNetUnfolder]: For 26656/26714 co-relation queries the response was YES. [2022-11-25 17:08:43,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24282 conditions, 4615 events. 2498/4615 cut-off events. For 26656/26714 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 37021 event pairs, 871 based on Foata normal form. 98/4483 useless extension candidates. Maximal degree in co-relation 24238. Up to 3431 conditions per place. [2022-11-25 17:08:43,188 INFO L137 encePairwiseOnDemand]: 446/458 looper letters, 304 selfloop transitions, 32 changer transitions 0/348 dead transitions. [2022-11-25 17:08:43,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 348 transitions, 4393 flow [2022-11-25 17:08:43,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:08:43,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:08:43,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 583 transitions. [2022-11-25 17:08:43,191 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4243085880640466 [2022-11-25 17:08:43,191 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 583 transitions. [2022-11-25 17:08:43,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 583 transitions. [2022-11-25 17:08:43,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:08:43,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 583 transitions. [2022-11-25 17:08:43,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:43,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:43,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:43,196 INFO L175 Difference]: Start difference. First operand has 133 places, 306 transitions, 3313 flow. Second operand 3 states and 583 transitions. [2022-11-25 17:08:43,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 348 transitions, 4393 flow [2022-11-25 17:08:43,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 348 transitions, 4335 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:08:43,316 INFO L231 Difference]: Finished difference. Result has 135 places, 319 transitions, 3619 flow [2022-11-25 17:08:43,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=3232, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3619, PETRI_PLACES=135, PETRI_TRANSITIONS=319} [2022-11-25 17:08:43,317 INFO L288 CegarLoopForPetriNet]: 117 programPoint places, 18 predicate places. [2022-11-25 17:08:43,318 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 319 transitions, 3619 flow [2022-11-25 17:08:43,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:43,318 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:43,318 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 17:08:43,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-25 17:08:43,319 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2022-11-25 17:08:43,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:43,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1502864264, now seen corresponding path program 1 times [2022-11-25 17:08:43,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:43,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168615187] [2022-11-25 17:08:43,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:43,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:08:43,329 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:08:43,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:08:43,340 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:08:43,340 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:08:43,340 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (117 of 118 remaining) [2022-11-25 17:08:43,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (116 of 118 remaining) [2022-11-25 17:08:43,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (115 of 118 remaining) [2022-11-25 17:08:43,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (114 of 118 remaining) [2022-11-25 17:08:43,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (113 of 118 remaining) [2022-11-25 17:08:43,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (112 of 118 remaining) [2022-11-25 17:08:43,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (111 of 118 remaining) [2022-11-25 17:08:43,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (110 of 118 remaining) [2022-11-25 17:08:43,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (109 of 118 remaining) [2022-11-25 17:08:43,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (108 of 118 remaining) [2022-11-25 17:08:43,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (107 of 118 remaining) [2022-11-25 17:08:43,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (106 of 118 remaining) [2022-11-25 17:08:43,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (105 of 118 remaining) [2022-11-25 17:08:43,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (104 of 118 remaining) [2022-11-25 17:08:43,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37ASSERT_VIOLATIONMEMORY_LEAK (103 of 118 remaining) [2022-11-25 17:08:43,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (102 of 118 remaining) [2022-11-25 17:08:43,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (101 of 118 remaining) [2022-11-25 17:08:43,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (100 of 118 remaining) [2022-11-25 17:08:43,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (99 of 118 remaining) [2022-11-25 17:08:43,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (98 of 118 remaining) [2022-11-25 17:08:43,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (97 of 118 remaining) [2022-11-25 17:08:43,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (96 of 118 remaining) [2022-11-25 17:08:43,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 118 remaining) [2022-11-25 17:08:43,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (94 of 118 remaining) [2022-11-25 17:08:43,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (93 of 118 remaining) [2022-11-25 17:08:43,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 118 remaining) [2022-11-25 17:08:43,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 118 remaining) [2022-11-25 17:08:43,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (90 of 118 remaining) [2022-11-25 17:08:43,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 118 remaining) [2022-11-25 17:08:43,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 118 remaining) [2022-11-25 17:08:43,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 118 remaining) [2022-11-25 17:08:43,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 118 remaining) [2022-11-25 17:08:43,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 118 remaining) [2022-11-25 17:08:43,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 118 remaining) [2022-11-25 17:08:43,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 118 remaining) [2022-11-25 17:08:43,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 118 remaining) [2022-11-25 17:08:43,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 118 remaining) [2022-11-25 17:08:43,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 118 remaining) [2022-11-25 17:08:43,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 118 remaining) [2022-11-25 17:08:43,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (78 of 118 remaining) [2022-11-25 17:08:43,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 118 remaining) [2022-11-25 17:08:43,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 118 remaining) [2022-11-25 17:08:43,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 118 remaining) [2022-11-25 17:08:43,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 118 remaining) [2022-11-25 17:08:43,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 118 remaining) [2022-11-25 17:08:43,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 118 remaining) [2022-11-25 17:08:43,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 118 remaining) [2022-11-25 17:08:43,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 118 remaining) [2022-11-25 17:08:43,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 118 remaining) [2022-11-25 17:08:43,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 118 remaining) [2022-11-25 17:08:43,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (67 of 118 remaining) [2022-11-25 17:08:43,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 118 remaining) [2022-11-25 17:08:43,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 118 remaining) [2022-11-25 17:08:43,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 118 remaining) [2022-11-25 17:08:43,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 118 remaining) [2022-11-25 17:08:43,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37ASSERT_VIOLATIONMEMORY_LEAK (62 of 118 remaining) [2022-11-25 17:08:43,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 118 remaining) [2022-11-25 17:08:43,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 118 remaining) [2022-11-25 17:08:43,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 118 remaining) [2022-11-25 17:08:43,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 118 remaining) [2022-11-25 17:08:43,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 118 remaining) [2022-11-25 17:08:43,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 118 remaining) [2022-11-25 17:08:43,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 118 remaining) [2022-11-25 17:08:43,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 118 remaining) [2022-11-25 17:08:43,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 118 remaining) [2022-11-25 17:08:43,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 118 remaining) [2022-11-25 17:08:43,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 118 remaining) [2022-11-25 17:08:43,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 118 remaining) [2022-11-25 17:08:43,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 118 remaining) [2022-11-25 17:08:43,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 118 remaining) [2022-11-25 17:08:43,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 118 remaining) [2022-11-25 17:08:43,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 118 remaining) [2022-11-25 17:08:43,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 118 remaining) [2022-11-25 17:08:43,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 118 remaining) [2022-11-25 17:08:43,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 118 remaining) [2022-11-25 17:08:43,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 118 remaining) [2022-11-25 17:08:43,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 118 remaining) [2022-11-25 17:08:43,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 118 remaining) [2022-11-25 17:08:43,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 118 remaining) [2022-11-25 17:08:43,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 118 remaining) [2022-11-25 17:08:43,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 118 remaining) [2022-11-25 17:08:43,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 118 remaining) [2022-11-25 17:08:43,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 118 remaining) [2022-11-25 17:08:43,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 118 remaining) [2022-11-25 17:08:43,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 118 remaining) [2022-11-25 17:08:43,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 118 remaining) [2022-11-25 17:08:43,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 118 remaining) [2022-11-25 17:08:43,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 118 remaining) [2022-11-25 17:08:43,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (29 of 118 remaining) [2022-11-25 17:08:43,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 118 remaining) [2022-11-25 17:08:43,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 118 remaining) [2022-11-25 17:08:43,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 118 remaining) [2022-11-25 17:08:43,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 118 remaining) [2022-11-25 17:08:43,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37ASSERT_VIOLATIONMEMORY_LEAK (24 of 118 remaining) [2022-11-25 17:08:43,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 118 remaining) [2022-11-25 17:08:43,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 118 remaining) [2022-11-25 17:08:43,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 118 remaining) [2022-11-25 17:08:43,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 118 remaining) [2022-11-25 17:08:43,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 118 remaining) [2022-11-25 17:08:43,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 118 remaining) [2022-11-25 17:08:43,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 118 remaining) [2022-11-25 17:08:43,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 118 remaining) [2022-11-25 17:08:43,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 118 remaining) [2022-11-25 17:08:43,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 118 remaining) [2022-11-25 17:08:43,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 118 remaining) [2022-11-25 17:08:43,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 118 remaining) [2022-11-25 17:08:43,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 118 remaining) [2022-11-25 17:08:43,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 118 remaining) [2022-11-25 17:08:43,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 118 remaining) [2022-11-25 17:08:43,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 118 remaining) [2022-11-25 17:08:43,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 118 remaining) [2022-11-25 17:08:43,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 118 remaining) [2022-11-25 17:08:43,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 118 remaining) [2022-11-25 17:08:43,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 118 remaining) [2022-11-25 17:08:43,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 118 remaining) [2022-11-25 17:08:43,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 118 remaining) [2022-11-25 17:08:43,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 118 remaining) [2022-11-25 17:08:43,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 118 remaining) [2022-11-25 17:08:43,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-25 17:08:43,363 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:08:43,363 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:08:43,363 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 17:08:43,504 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:08:43,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 342 places, 357 transitions, 735 flow [2022-11-25 17:08:43,603 INFO L130 PetriNetUnfolder]: 25/409 cut-off events. [2022-11-25 17:08:43,603 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:08:43,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425 conditions, 409 events. 25/409 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2170 event pairs, 0 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 330. Up to 8 conditions per place. [2022-11-25 17:08:43,611 INFO L82 GeneralOperation]: Start removeDead. Operand has 342 places, 357 transitions, 735 flow [2022-11-25 17:08:43,623 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 342 places, 357 transitions, 735 flow [2022-11-25 17:08:43,624 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:08:43,624 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 342 places, 357 transitions, 735 flow [2022-11-25 17:08:43,624 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 342 places, 357 transitions, 735 flow [2022-11-25 17:08:43,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 342 places, 357 transitions, 735 flow [2022-11-25 17:08:43,709 INFO L130 PetriNetUnfolder]: 25/409 cut-off events. [2022-11-25 17:08:43,709 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:08:43,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425 conditions, 409 events. 25/409 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2170 event pairs, 0 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 330. Up to 8 conditions per place. [2022-11-25 17:08:43,747 INFO L119 LiptonReduction]: Number of co-enabled transitions 77376 [2022-11-25 17:09:26,438 INFO L134 LiptonReduction]: Checked pairs total: 199591 [2022-11-25 17:09:26,438 INFO L136 LiptonReduction]: Total number of compositions: 307 [2022-11-25 17:09:26,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:09:26,441 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;@189b75dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:09:26,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 156 error locations. [2022-11-25 17:09:26,443 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-11-25 17:09:26,443 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:09:26,443 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:09:26,443 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:09:26,443 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 153 more)] === [2022-11-25 17:09:26,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:09:26,444 INFO L85 PathProgramCache]: Analyzing trace with hash 69553, now seen corresponding path program 1 times [2022-11-25 17:09:26,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:09:26,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762164095] [2022-11-25 17:09:26,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:26,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:09:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:09:26,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:09:26,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762164095] [2022-11-25 17:09:26,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762164095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:09:26,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:09:26,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:09:26,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421625787] [2022-11-25 17:09:26,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:09:26,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:09:26,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:09:26,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:09:26,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:09:26,604 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 664 [2022-11-25 17:09:26,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 184 transitions, 389 flow. Second operand has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:09:26,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:09:26,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 664 [2022-11-25 17:09:26,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand