./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8 --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 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d --- 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-2329fc7 [2022-12-13 18:07:44,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:07:44,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:07:44,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:07:44,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:07:44,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:07:44,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:07:44,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:07:44,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:07:44,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:07:44,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:07:44,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:07:44,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:07:44,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:07:44,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:07:44,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:07:44,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:07:44,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:07:44,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:07:44,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:07:44,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:07:44,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:07:44,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:07:44,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:07:44,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:07:44,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:07:44,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:07:44,249 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:07:44,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:07:44,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:07:44,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:07:44,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:07:44,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:07:44,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:07:44,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:07:44,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:07:44,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:07:44,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:07:44,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:07:44,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:07:44,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:07:44,256 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 18:07:44,274 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:07:44,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:07:44,275 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:07:44,275 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:07:44,275 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:07:44,275 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:07:44,281 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:07:44,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:07:44,282 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:07:44,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:07:44,282 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:07:44,282 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:07:44,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:07:44,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:07:44,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:07:44,283 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 18:07:44,283 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 18:07:44,283 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 18:07:44,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:07:44,284 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 18:07:44,284 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:07:44,284 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:07:44,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:07:44,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:07:44,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:07:44,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:07:44,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:07:44,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:07:44,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:07:44,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:07:44,286 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:07:44,286 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:07:44,286 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:07:44,286 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:07:44,286 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_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d [2022-12-13 18:07:44,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:07:44,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:07:44,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:07:44,521 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:07:44,522 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:07:44,523 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i [2022-12-13 18:07:47,052 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:07:47,288 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:07:47,289 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i [2022-12-13 18:07:47,301 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/data/bcb704965/05dfaa6413d94577880a8649fedf0bf0/FLAG84494fcd4 [2022-12-13 18:07:47,639 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/data/bcb704965/05dfaa6413d94577880a8649fedf0bf0 [2022-12-13 18:07:47,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:07:47,647 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:07:47,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:07:47,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:07:47,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:07:47,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:07:47" (1/1) ... [2022-12-13 18:07:47,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75353500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:47, skipping insertion in model container [2022-12-13 18:07:47,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:07:47" (1/1) ... [2022-12-13 18:07:47,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:07:47,708 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:07:47,950 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_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i[41323,41336] [2022-12-13 18:07:47,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:07:47,977 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:07:48,002 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_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i[41323,41336] [2022-12-13 18:07:48,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:07:48,041 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:07:48,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:48 WrapperNode [2022-12-13 18:07:48,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:07:48,042 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:07:48,042 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:07:48,042 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:07:48,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:48" (1/1) ... [2022-12-13 18:07:48,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:48" (1/1) ... [2022-12-13 18:07:48,075 INFO L138 Inliner]: procedures = 273, calls = 43, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 148 [2022-12-13 18:07:48,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:07:48,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:07:48,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:07:48,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:07:48,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:48" (1/1) ... [2022-12-13 18:07:48,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:48" (1/1) ... [2022-12-13 18:07:48,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:48" (1/1) ... [2022-12-13 18:07:48,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:48" (1/1) ... [2022-12-13 18:07:48,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:48" (1/1) ... [2022-12-13 18:07:48,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:48" (1/1) ... [2022-12-13 18:07:48,093 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:48" (1/1) ... [2022-12-13 18:07:48,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:48" (1/1) ... [2022-12-13 18:07:48,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:07:48,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:07:48,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:07:48,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:07:48,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:48" (1/1) ... [2022-12-13 18:07:48,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:07:48,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:07:48,133 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:07:48,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:07:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 18:07:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 18:07:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 18:07:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 18:07:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 18:07:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:07:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 18:07:48,164 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 18:07:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 18:07:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:07:48,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:07:48,165 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 18:07:48,263 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:07:48,265 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:07:48,472 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:07:48,478 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:07:48,479 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-12-13 18:07:48,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:07:48 BoogieIcfgContainer [2022-12-13 18:07:48,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:07:48,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:07:48,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:07:48,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:07:48,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:07:47" (1/3) ... [2022-12-13 18:07:48,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efbfc2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:07:48, skipping insertion in model container [2022-12-13 18:07:48,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:48" (2/3) ... [2022-12-13 18:07:48,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efbfc2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:07:48, skipping insertion in model container [2022-12-13 18:07:48,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:07:48" (3/3) ... [2022-12-13 18:07:48,489 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_27-funptr_racing.i [2022-12-13 18:07:48,504 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:07:48,504 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-12-13 18:07:48,504 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 18:07:48,559 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 18:07:48,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 163 transitions, 334 flow [2022-12-13 18:07:48,650 INFO L130 PetriNetUnfolder]: 24/210 cut-off events. [2022-12-13 18:07:48,651 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 18:07:48,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 210 events. 24/210 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 624 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 118. Up to 4 conditions per place. [2022-12-13 18:07:48,657 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 163 transitions, 334 flow [2022-12-13 18:07:48,662 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 163 transitions, 334 flow [2022-12-13 18:07:48,664 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:07:48,673 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 163 transitions, 334 flow [2022-12-13 18:07:48,675 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 163 transitions, 334 flow [2022-12-13 18:07:48,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 163 transitions, 334 flow [2022-12-13 18:07:48,712 INFO L130 PetriNetUnfolder]: 24/210 cut-off events. [2022-12-13 18:07:48,712 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 18:07:48,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 210 events. 24/210 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 624 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 118. Up to 4 conditions per place. [2022-12-13 18:07:48,716 INFO L119 LiptonReduction]: Number of co-enabled transitions 6996 [2022-12-13 18:07:51,375 INFO L134 LiptonReduction]: Checked pairs total: 14567 [2022-12-13 18:07:51,375 INFO L136 LiptonReduction]: Total number of compositions: 133 [2022-12-13 18:07:51,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:07:51,389 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;@296d7e10, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:07:51,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 18:07:51,391 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2022-12-13 18:07:51,391 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:07:51,391 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:07:51,391 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:07:51,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 18:07:51,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:51,395 INFO L85 PathProgramCache]: Analyzing trace with hash 20323, now seen corresponding path program 1 times [2022-12-13 18:07:51,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:51,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396625664] [2022-12-13 18:07:51,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:51,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:51,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:51,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396625664] [2022-12-13 18:07:51,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396625664] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:51,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:51,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:07:51,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201249484] [2022-12-13 18:07:51,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:51,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:07:51,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:51,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:07:51,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:07:51,674 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 296 [2022-12-13 18:07:51,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 59 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:51,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:07:51,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 296 [2022-12-13 18:07:51,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:07:51,815 INFO L130 PetriNetUnfolder]: 257/569 cut-off events. [2022-12-13 18:07:51,815 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 18:07:51,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1126 conditions, 569 events. 257/569 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2856 event pairs, 208 based on Foata normal form. 32/472 useless extension candidates. Maximal degree in co-relation 1071. Up to 475 conditions per place. [2022-12-13 18:07:51,820 INFO L137 encePairwiseOnDemand]: 276/296 looper letters, 50 selfloop transitions, 2 changer transitions 1/59 dead transitions. [2022-12-13 18:07:51,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 232 flow [2022-12-13 18:07:51,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:07:51,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:07:51,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2022-12-13 18:07:51,834 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5484234234234234 [2022-12-13 18:07:51,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2022-12-13 18:07:51,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2022-12-13 18:07:51,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:07:51,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2022-12-13 18:07:51,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:51,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:51,846 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:51,847 INFO L175 Difference]: Start difference. First operand has 45 places, 59 transitions, 126 flow. Second operand 3 states and 487 transitions. [2022-12-13 18:07:51,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 232 flow [2022-12-13 18:07:51,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 232 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 18:07:51,851 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 94 flow [2022-12-13 18:07:51,852 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2022-12-13 18:07:51,855 INFO L288 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2022-12-13 18:07:51,855 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 94 flow [2022-12-13 18:07:51,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:51,856 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:07:51,856 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:07:51,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 18:07:51,856 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 18:07:51,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:51,857 INFO L85 PathProgramCache]: Analyzing trace with hash 20322, now seen corresponding path program 1 times [2022-12-13 18:07:51,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:51,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267130578] [2022-12-13 18:07:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:51,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:51,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:51,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:51,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267130578] [2022-12-13 18:07:51,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267130578] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:51,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:51,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:07:51,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051824551] [2022-12-13 18:07:51,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:51,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:07:51,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:51,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:07:51,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:07:52,008 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 296 [2022-12-13 18:07:52,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:52,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:07:52,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 296 [2022-12-13 18:07:52,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:07:52,119 INFO L130 PetriNetUnfolder]: 239/527 cut-off events. [2022-12-13 18:07:52,119 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 18:07:52,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1056 conditions, 527 events. 239/527 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2457 event pairs, 195 based on Foata normal form. 0/441 useless extension candidates. Maximal degree in co-relation 1027. Up to 482 conditions per place. [2022-12-13 18:07:52,123 INFO L137 encePairwiseOnDemand]: 292/296 looper letters, 51 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2022-12-13 18:07:52,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 236 flow [2022-12-13 18:07:52,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:07:52,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:07:52,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2022-12-13 18:07:52,125 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5281531531531531 [2022-12-13 18:07:52,125 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 469 transitions. [2022-12-13 18:07:52,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 469 transitions. [2022-12-13 18:07:52,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:07:52,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 469 transitions. [2022-12-13 18:07:52,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:52,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:52,130 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:52,131 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 94 flow. Second operand 3 states and 469 transitions. [2022-12-13 18:07:52,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 236 flow [2022-12-13 18:07:52,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 59 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:07:52,133 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 100 flow [2022-12-13 18:07:52,133 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2022-12-13 18:07:52,134 INFO L288 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2022-12-13 18:07:52,134 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 100 flow [2022-12-13 18:07:52,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:52,135 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:07:52,135 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 18:07:52,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 18:07:52,135 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 18:07:52,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:52,136 INFO L85 PathProgramCache]: Analyzing trace with hash 605944462, now seen corresponding path program 1 times [2022-12-13 18:07:52,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:52,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936006622] [2022-12-13 18:07:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:52,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:52,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:52,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936006622] [2022-12-13 18:07:52,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936006622] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:07:52,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555809009] [2022-12-13 18:07:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:52,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:07:52,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:07:52,243 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:07:52,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 18:07:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:52,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:07:52,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:07:52,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 18:07:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:52,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:07:52,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:52,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555809009] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:07:52,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:07:52,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 18:07:52,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766515646] [2022-12-13 18:07:52,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:07:52,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 18:07:52,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:52,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 18:07:52,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:07:52,512 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 296 [2022-12-13 18:07:52,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 100 flow. Second operand has 7 states, 7 states have (on average 136.71428571428572) internal successors, (957), 7 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:52,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:07:52,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 296 [2022-12-13 18:07:52,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:07:52,579 INFO L130 PetriNetUnfolder]: 35/109 cut-off events. [2022-12-13 18:07:52,579 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 18:07:52,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 109 events. 35/109 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 388 event pairs, 0 based on Foata normal form. 17/123 useless extension candidates. Maximal degree in co-relation 208. Up to 68 conditions per place. [2022-12-13 18:07:52,580 INFO L137 encePairwiseOnDemand]: 292/296 looper letters, 37 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2022-12-13 18:07:52,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 44 transitions, 177 flow [2022-12-13 18:07:52,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:07:52,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:07:52,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 581 transitions. [2022-12-13 18:07:52,581 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4907094594594595 [2022-12-13 18:07:52,582 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 581 transitions. [2022-12-13 18:07:52,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 581 transitions. [2022-12-13 18:07:52,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:07:52,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 581 transitions. [2022-12-13 18:07:52,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:52,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:52,585 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:52,585 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 100 flow. Second operand 4 states and 581 transitions. [2022-12-13 18:07:52,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 44 transitions, 177 flow [2022-12-13 18:07:52,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 44 transitions, 171 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 18:07:52,586 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 61 flow [2022-12-13 18:07:52,586 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=61, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2022-12-13 18:07:52,587 INFO L288 CegarLoopForPetriNet]: 45 programPoint places, -14 predicate places. [2022-12-13 18:07:52,587 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 61 flow [2022-12-13 18:07:52,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 136.71428571428572) internal successors, (957), 7 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:52,588 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:07:52,588 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 18:07:52,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:07:52,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:07:52,788 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 18:07:52,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:52,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1604409671, now seen corresponding path program 1 times [2022-12-13 18:07:52,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:52,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883682887] [2022-12-13 18:07:52,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:52,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:07:52,806 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 18:07:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:07:52,830 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 18:07:52,830 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 18:07:52,831 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 18:07:52,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-12-13 18:07:52,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 18:07:52,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 18:07:52,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-12-13 18:07:52,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-12-13 18:07:52,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 18:07:52,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 18:07:52,834 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 18:07:52,836 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 18:07:52,837 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 18:07:52,863 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 18:07:52,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 231 transitions, 480 flow [2022-12-13 18:07:52,897 INFO L130 PetriNetUnfolder]: 45/355 cut-off events. [2022-12-13 18:07:52,897 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 18:07:52,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 355 events. 45/355 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1335 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 212. Up to 8 conditions per place. [2022-12-13 18:07:52,900 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 231 transitions, 480 flow [2022-12-13 18:07:52,903 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 231 transitions, 480 flow [2022-12-13 18:07:52,903 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:07:52,903 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 231 transitions, 480 flow [2022-12-13 18:07:52,903 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 231 transitions, 480 flow [2022-12-13 18:07:52,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 231 transitions, 480 flow [2022-12-13 18:07:52,946 INFO L130 PetriNetUnfolder]: 45/355 cut-off events. [2022-12-13 18:07:52,946 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 18:07:52,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 355 events. 45/355 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1335 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 212. Up to 8 conditions per place. [2022-12-13 18:07:52,960 INFO L119 LiptonReduction]: Number of co-enabled transitions 24156 [2022-12-13 18:07:55,834 INFO L134 LiptonReduction]: Checked pairs total: 61911 [2022-12-13 18:07:55,834 INFO L136 LiptonReduction]: Total number of compositions: 170 [2022-12-13 18:07:55,835 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:07:55,836 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;@296d7e10, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:07:55,836 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 18:07:55,837 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 18:07:55,837 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:07:55,837 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:07:55,837 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:07:55,837 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 18:07:55,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:55,838 INFO L85 PathProgramCache]: Analyzing trace with hash 35325, now seen corresponding path program 1 times [2022-12-13 18:07:55,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:55,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489135585] [2022-12-13 18:07:55,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:55,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:55,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:55,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489135585] [2022-12-13 18:07:55,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489135585] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:55,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:55,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:07:55,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17204825] [2022-12-13 18:07:55,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:55,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:07:55,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:55,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:07:55,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:07:55,907 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 401 [2022-12-13 18:07:55,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 104 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:55,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:07:55,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 401 [2022-12-13 18:07:55,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:07:57,237 INFO L130 PetriNetUnfolder]: 11828/19515 cut-off events. [2022-12-13 18:07:57,237 INFO L131 PetriNetUnfolder]: For 88/88 co-relation queries the response was YES. [2022-12-13 18:07:57,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37787 conditions, 19515 events. 11828/19515 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 146608 event pairs, 5321 based on Foata normal form. 1992/17821 useless extension candidates. Maximal degree in co-relation 2639. Up to 18117 conditions per place. [2022-12-13 18:07:57,331 INFO L137 encePairwiseOnDemand]: 370/401 looper letters, 77 selfloop transitions, 2 changer transitions 1/98 dead transitions. [2022-12-13 18:07:57,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 98 transitions, 374 flow [2022-12-13 18:07:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:07:57,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:07:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 697 transitions. [2022-12-13 18:07:57,333 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5793848711554447 [2022-12-13 18:07:57,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 697 transitions. [2022-12-13 18:07:57,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 697 transitions. [2022-12-13 18:07:57,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:07:57,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 697 transitions. [2022-12-13 18:07:57,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:57,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:57,340 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:57,341 INFO L175 Difference]: Start difference. First operand has 78 places, 104 transitions, 226 flow. Second operand 3 states and 697 transitions. [2022-12-13 18:07:57,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 98 transitions, 374 flow [2022-12-13 18:07:57,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 98 transitions, 374 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 18:07:57,345 INFO L231 Difference]: Finished difference. Result has 81 places, 77 transitions, 184 flow [2022-12-13 18:07:57,345 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=81, PETRI_TRANSITIONS=77} [2022-12-13 18:07:57,346 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2022-12-13 18:07:57,346 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 77 transitions, 184 flow [2022-12-13 18:07:57,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:57,347 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:07:57,347 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:07:57,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 18:07:57,347 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 18:07:57,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:57,348 INFO L85 PathProgramCache]: Analyzing trace with hash 35327, now seen corresponding path program 1 times [2022-12-13 18:07:57,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:57,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119586339] [2022-12-13 18:07:57,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:57,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:57,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:57,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119586339] [2022-12-13 18:07:57,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119586339] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:57,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:57,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:07:57,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705040993] [2022-12-13 18:07:57,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:57,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:07:57,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:57,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:07:57,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:07:57,409 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 401 [2022-12-13 18:07:57,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:57,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:07:57,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 401 [2022-12-13 18:07:57,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:07:58,441 INFO L130 PetriNetUnfolder]: 9794/16005 cut-off events. [2022-12-13 18:07:58,441 INFO L131 PetriNetUnfolder]: For 781/781 co-relation queries the response was YES. [2022-12-13 18:07:58,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32201 conditions, 16005 events. 9794/16005 cut-off events. For 781/781 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 114672 event pairs, 8568 based on Foata normal form. 0/13781 useless extension candidates. Maximal degree in co-relation 32070. Up to 13994 conditions per place. [2022-12-13 18:07:58,495 INFO L137 encePairwiseOnDemand]: 397/401 looper letters, 91 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2022-12-13 18:07:58,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 111 transitions, 438 flow [2022-12-13 18:07:58,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:07:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:07:58,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 661 transitions. [2022-12-13 18:07:58,497 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5494596841230258 [2022-12-13 18:07:58,497 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 661 transitions. [2022-12-13 18:07:58,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 661 transitions. [2022-12-13 18:07:58,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:07:58,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 661 transitions. [2022-12-13 18:07:58,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:58,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:58,501 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:58,501 INFO L175 Difference]: Start difference. First operand has 81 places, 77 transitions, 184 flow. Second operand 3 states and 661 transitions. [2022-12-13 18:07:58,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 111 transitions, 438 flow [2022-12-13 18:07:58,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 111 transitions, 436 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:07:58,503 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 182 flow [2022-12-13 18:07:58,503 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2022-12-13 18:07:58,504 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2022-12-13 18:07:58,504 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 182 flow [2022-12-13 18:07:58,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:58,505 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:07:58,505 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:07:58,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 18:07:58,505 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 18:07:58,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:58,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1707804431, now seen corresponding path program 1 times [2022-12-13 18:07:58,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:58,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182609617] [2022-12-13 18:07:58,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:58,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:58,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:58,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182609617] [2022-12-13 18:07:58,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182609617] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:07:58,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643613491] [2022-12-13 18:07:58,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:58,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:07:58,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:07:58,576 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:07:58,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 18:07:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:58,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:07:58,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:07:58,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 18:07:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:58,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:07:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:58,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643613491] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:07:58,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:07:58,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 18:07:58,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667459916] [2022-12-13 18:07:58,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:07:58,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 18:07:58,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:58,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 18:07:58,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:07:58,796 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 401 [2022-12-13 18:07:58,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 190.71428571428572) internal successors, (1335), 7 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:58,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:07:58,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 401 [2022-12-13 18:07:58,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:07:59,944 INFO L130 PetriNetUnfolder]: 8984/14508 cut-off events. [2022-12-13 18:07:59,944 INFO L131 PetriNetUnfolder]: For 892/892 co-relation queries the response was YES. [2022-12-13 18:07:59,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29758 conditions, 14508 events. 8984/14508 cut-off events. For 892/892 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 101892 event pairs, 2223 based on Foata normal form. 18/13287 useless extension candidates. Maximal degree in co-relation 27297. Up to 11957 conditions per place. [2022-12-13 18:07:59,984 INFO L137 encePairwiseOnDemand]: 396/401 looper letters, 144 selfloop transitions, 4 changer transitions 0/166 dead transitions. [2022-12-13 18:07:59,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 166 transitions, 658 flow [2022-12-13 18:07:59,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:07:59,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:07:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1096 transitions. [2022-12-13 18:07:59,986 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5466334164588529 [2022-12-13 18:07:59,986 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1096 transitions. [2022-12-13 18:07:59,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1096 transitions. [2022-12-13 18:07:59,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:07:59,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1096 transitions. [2022-12-13 18:07:59,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.2) internal successors, (1096), 5 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:59,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 401.0) internal successors, (2406), 6 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:59,990 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 401.0) internal successors, (2406), 6 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:59,990 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 182 flow. Second operand 5 states and 1096 transitions. [2022-12-13 18:07:59,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 166 transitions, 658 flow [2022-12-13 18:08:00,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 166 transitions, 654 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:08:00,010 INFO L231 Difference]: Finished difference. Result has 81 places, 74 transitions, 186 flow [2022-12-13 18:08:00,010 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=81, PETRI_TRANSITIONS=74} [2022-12-13 18:08:00,010 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2022-12-13 18:08:00,010 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 74 transitions, 186 flow [2022-12-13 18:08:00,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 190.71428571428572) internal successors, (1335), 7 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:00,011 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:08:00,011 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 18:08:00,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 18:08:00,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 18:08:00,211 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 18:08:00,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:08:00,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1472788000, now seen corresponding path program 1 times [2022-12-13 18:08:00,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:08:00,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004256662] [2022-12-13 18:08:00,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:08:00,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:08:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:08:00,222 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 18:08:00,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:08:00,232 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 18:08:00,232 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 18:08:00,232 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 18:08:00,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-12-13 18:08:00,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 18:08:00,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 18:08:00,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-12-13 18:08:00,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-12-13 18:08:00,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 18:08:00,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 18:08:00,233 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 18:08:00,234 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 18:08:00,234 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 18:08:00,255 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 18:08:00,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 299 transitions, 628 flow [2022-12-13 18:08:00,313 INFO L130 PetriNetUnfolder]: 71/543 cut-off events. [2022-12-13 18:08:00,313 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 18:08:00,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 543 events. 71/543 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2275 event pairs, 1 based on Foata normal form. 0/432 useless extension candidates. Maximal degree in co-relation 363. Up to 16 conditions per place. [2022-12-13 18:08:00,316 INFO L82 GeneralOperation]: Start removeDead. Operand has 259 places, 299 transitions, 628 flow [2022-12-13 18:08:00,320 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 259 places, 299 transitions, 628 flow [2022-12-13 18:08:00,320 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:08:00,320 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 259 places, 299 transitions, 628 flow [2022-12-13 18:08:00,320 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 259 places, 299 transitions, 628 flow [2022-12-13 18:08:00,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 299 transitions, 628 flow [2022-12-13 18:08:00,373 INFO L130 PetriNetUnfolder]: 71/543 cut-off events. [2022-12-13 18:08:00,373 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 18:08:00,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 543 events. 71/543 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2275 event pairs, 1 based on Foata normal form. 0/432 useless extension candidates. Maximal degree in co-relation 363. Up to 16 conditions per place. [2022-12-13 18:08:00,393 INFO L119 LiptonReduction]: Number of co-enabled transitions 49896 [2022-12-13 18:08:03,558 INFO L134 LiptonReduction]: Checked pairs total: 151282 [2022-12-13 18:08:03,558 INFO L136 LiptonReduction]: Total number of compositions: 215 [2022-12-13 18:08:03,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:08:03,560 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;@296d7e10, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:08:03,560 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 18:08:03,561 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2022-12-13 18:08:03,561 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:08:03,561 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:08:03,561 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:08:03,561 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 18:08:03,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:08:03,561 INFO L85 PathProgramCache]: Analyzing trace with hash 53942, now seen corresponding path program 1 times [2022-12-13 18:08:03,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:08:03,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877363369] [2022-12-13 18:08:03,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:08:03,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:08:03,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:08:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:08:03,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:08:03,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877363369] [2022-12-13 18:08:03,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877363369] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:08:03,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:08:03,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:08:03,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528868368] [2022-12-13 18:08:03,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:08:03,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:08:03,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:08:03,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:08:03,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:08:03,602 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 514 [2022-12-13 18:08:03,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 143 transitions, 316 flow. Second operand has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:03,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:08:03,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 514 [2022-12-13 18:08:03,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:08:26,414 INFO L130 PetriNetUnfolder]: 248119/365722 cut-off events. [2022-12-13 18:08:26,414 INFO L131 PetriNetUnfolder]: For 3452/3452 co-relation queries the response was YES. [2022-12-13 18:08:26,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 703695 conditions, 365722 events. 248119/365722 cut-off events. For 3452/3452 co-relation queries the response was YES. Maximal size of possible extension queue 9222. Compared 3266308 event pairs, 201875 based on Foata normal form. 44472/355959 useless extension candidates. Maximal degree in co-relation 101722. Up to 290967 conditions per place. [2022-12-13 18:08:27,883 INFO L137 encePairwiseOnDemand]: 470/514 looper letters, 122 selfloop transitions, 2 changer transitions 1/153 dead transitions. [2022-12-13 18:08:27,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 153 transitions, 586 flow [2022-12-13 18:08:27,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:08:27,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:08:27,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 931 transitions. [2022-12-13 18:08:27,886 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6037613488975356 [2022-12-13 18:08:27,886 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 931 transitions. [2022-12-13 18:08:27,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 931 transitions. [2022-12-13 18:08:27,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:08:27,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 931 transitions. [2022-12-13 18:08:27,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 310.3333333333333) internal successors, (931), 3 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:27,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 514.0) internal successors, (2056), 4 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:27,890 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 514.0) internal successors, (2056), 4 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:27,890 INFO L175 Difference]: Start difference. First operand has 105 places, 143 transitions, 316 flow. Second operand 3 states and 931 transitions. [2022-12-13 18:08:27,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 153 transitions, 586 flow [2022-12-13 18:08:27,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 153 transitions, 586 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 18:08:27,893 INFO L231 Difference]: Finished difference. Result has 105 places, 101 transitions, 236 flow [2022-12-13 18:08:27,893 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=105, PETRI_TRANSITIONS=101} [2022-12-13 18:08:27,893 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, 0 predicate places. [2022-12-13 18:08:27,894 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 101 transitions, 236 flow [2022-12-13 18:08:27,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:27,894 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:08:27,894 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:08:27,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 18:08:27,894 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 18:08:27,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:08:27,895 INFO L85 PathProgramCache]: Analyzing trace with hash 53941, now seen corresponding path program 1 times [2022-12-13 18:08:27,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:08:27,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700619202] [2022-12-13 18:08:27,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:08:27,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:08:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:08:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:08:27,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:08:27,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700619202] [2022-12-13 18:08:27,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700619202] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:08:27,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:08:27,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:08:27,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342029499] [2022-12-13 18:08:27,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:08:27,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:08:27,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:08:27,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:08:27,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:08:27,954 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 514 [2022-12-13 18:08:27,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 101 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:27,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:08:27,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 514 [2022-12-13 18:08:27,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:08:47,292 INFO L130 PetriNetUnfolder]: 231647/344121 cut-off events. [2022-12-13 18:08:47,292 INFO L131 PetriNetUnfolder]: For 7687/7687 co-relation queries the response was YES. [2022-12-13 18:08:47,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 665760 conditions, 344121 events. 231647/344121 cut-off events. For 7687/7687 co-relation queries the response was YES. Maximal size of possible extension queue 8715. Compared 3080840 event pairs, 141776 based on Foata normal form. 0/304784 useless extension candidates. Maximal degree in co-relation 613909. Up to 313223 conditions per place. [2022-12-13 18:08:48,733 INFO L137 encePairwiseOnDemand]: 510/514 looper letters, 91 selfloop transitions, 2 changer transitions 0/121 dead transitions. [2022-12-13 18:08:48,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 121 transitions, 462 flow [2022-12-13 18:08:48,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:08:48,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:08:48,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 833 transitions. [2022-12-13 18:08:48,735 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.540207522697795 [2022-12-13 18:08:48,736 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 833 transitions. [2022-12-13 18:08:48,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 833 transitions. [2022-12-13 18:08:48,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:08:48,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 833 transitions. [2022-12-13 18:08:48,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 277.6666666666667) internal successors, (833), 3 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:48,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 514.0) internal successors, (2056), 4 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:48,739 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 514.0) internal successors, (2056), 4 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:48,739 INFO L175 Difference]: Start difference. First operand has 105 places, 101 transitions, 236 flow. Second operand 3 states and 833 transitions. [2022-12-13 18:08:48,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 121 transitions, 462 flow [2022-12-13 18:08:50,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 121 transitions, 458 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:08:51,000 INFO L231 Difference]: Finished difference. Result has 105 places, 102 transitions, 246 flow [2022-12-13 18:08:51,001 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2022-12-13 18:08:51,001 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, 0 predicate places. [2022-12-13 18:08:51,001 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 246 flow [2022-12-13 18:08:51,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:51,001 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:08:51,001 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:08:51,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 18:08:51,001 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 18:08:51,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:08:51,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1680846490, now seen corresponding path program 1 times [2022-12-13 18:08:51,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:08:51,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856680703] [2022-12-13 18:08:51,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:08:51,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:08:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:08:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:08:51,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:08:51,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856680703] [2022-12-13 18:08:51,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856680703] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:08:51,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318304802] [2022-12-13 18:08:51,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:08:51,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:08:51,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:08:51,054 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:08:51,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 18:08:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:08:51,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:08:51,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:08:51,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 18:08:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:08:51,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:08:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:08:51,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318304802] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:08:51,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:08:51,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 18:08:51,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855809447] [2022-12-13 18:08:51,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:08:51,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 18:08:51,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:08:51,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 18:08:51,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:08:51,230 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 514 [2022-12-13 18:08:51,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 244.71428571428572) internal successors, (1713), 7 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:51,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:08:51,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 514 [2022-12-13 18:08:51,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:09:09,085 INFO L130 PetriNetUnfolder]: 218198/315264 cut-off events. [2022-12-13 18:09:09,085 INFO L131 PetriNetUnfolder]: For 17936/17936 co-relation queries the response was YES. [2022-12-13 18:09:09,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630422 conditions, 315264 events. 218198/315264 cut-off events. For 17936/17936 co-relation queries the response was YES. Maximal size of possible extension queue 7875. Compared 2681566 event pairs, 37604 based on Foata normal form. 18/284562 useless extension candidates. Maximal degree in co-relation 42876. Up to 245865 conditions per place. [2022-12-13 18:09:10,418 INFO L137 encePairwiseOnDemand]: 509/514 looper letters, 240 selfloop transitions, 6 changer transitions 0/274 dead transitions. [2022-12-13 18:09:10,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 274 transitions, 1090 flow [2022-12-13 18:09:10,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:09:10,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 18:09:10,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1708 transitions. [2022-12-13 18:09:10,422 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5538261997405967 [2022-12-13 18:09:10,422 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1708 transitions. [2022-12-13 18:09:10,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1708 transitions. [2022-12-13 18:09:10,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:09:10,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1708 transitions. [2022-12-13 18:09:10,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 284.6666666666667) internal successors, (1708), 6 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:09:10,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 514.0) internal successors, (3598), 7 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:09:10,429 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 514.0) internal successors, (3598), 7 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:09:10,429 INFO L175 Difference]: Start difference. First operand has 105 places, 102 transitions, 246 flow. Second operand 6 states and 1708 transitions. [2022-12-13 18:09:10,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 274 transitions, 1090 flow [2022-12-13 18:09:10,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 274 transitions, 1088 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:09:10,434 INFO L231 Difference]: Finished difference. Result has 109 places, 103 transitions, 262 flow [2022-12-13 18:09:10,434 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=109, PETRI_TRANSITIONS=103} [2022-12-13 18:09:10,434 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, 4 predicate places. [2022-12-13 18:09:10,435 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 103 transitions, 262 flow [2022-12-13 18:09:10,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 244.71428571428572) internal successors, (1713), 7 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:09:10,435 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:09:10,435 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 18:09:10,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 18:09:10,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40b5cd3-9c15-4d16-a9a1-6f3a061274a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 18:09:10,637 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 18:09:10,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:09:10,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1515781944, now seen corresponding path program 1 times [2022-12-13 18:09:10,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:09:10,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523453656] [2022-12-13 18:09:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:09:10,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:09:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:09:10,672 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 18:09:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:09:10,681 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 18:09:10,682 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 18:09:10,682 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 18:09:10,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-12-13 18:09:10,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 18:09:10,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 18:09:10,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-12-13 18:09:10,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-12-13 18:09:10,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 18:09:10,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 18:09:10,826 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 18:09:10,826 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 18:09:10,826 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 18:09:10,853 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 18:09:10,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 315 places, 367 transitions, 778 flow [2022-12-13 18:09:10,961 INFO L130 PetriNetUnfolder]: 109/819 cut-off events. [2022-12-13 18:09:10,962 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 18:09:10,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 819 events. 109/819 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3791 event pairs, 6 based on Foata normal form. 0/647 useless extension candidates. Maximal degree in co-relation 563. Up to 32 conditions per place. [2022-12-13 18:09:10,968 INFO L82 GeneralOperation]: Start removeDead. Operand has 315 places, 367 transitions, 778 flow [2022-12-13 18:09:10,975 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 315 places, 367 transitions, 778 flow [2022-12-13 18:09:10,975 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:09:10,975 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 315 places, 367 transitions, 778 flow [2022-12-13 18:09:10,975 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 315 places, 367 transitions, 778 flow [2022-12-13 18:09:10,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 315 places, 367 transitions, 778 flow [2022-12-13 18:09:11,078 INFO L130 PetriNetUnfolder]: 109/819 cut-off events. [2022-12-13 18:09:11,078 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 18:09:11,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 819 events. 109/819 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3791 event pairs, 6 based on Foata normal form. 0/647 useless extension candidates. Maximal degree in co-relation 563. Up to 32 conditions per place. [2022-12-13 18:09:11,119 INFO L119 LiptonReduction]: Number of co-enabled transitions 84744 [2022-12-13 18:09:14,123 INFO L134 LiptonReduction]: Checked pairs total: 260576 [2022-12-13 18:09:14,123 INFO L136 LiptonReduction]: Total number of compositions: 253 [2022-12-13 18:09:14,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:09:14,125 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;@296d7e10, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:09:14,125 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 18:09:14,126 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 18:09:14,126 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:09:14,126 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:09:14,127 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:09:14,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 18:09:14,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:09:14,127 INFO L85 PathProgramCache]: Analyzing trace with hash 75933, now seen corresponding path program 1 times [2022-12-13 18:09:14,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:09:14,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876777758] [2022-12-13 18:09:14,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:09:14,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:09:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:09:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:09:14,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:09:14,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876777758] [2022-12-13 18:09:14,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876777758] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:09:14,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:09:14,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:09:14,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537296190] [2022-12-13 18:09:14,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:09:14,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:09:14,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:09:14,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:09:14,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:09:14,168 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 620 [2022-12-13 18:09:14,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 182 transitions, 408 flow. Second operand has 3 states, 3 states have (on average 297.6666666666667) internal successors, (893), 3 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:09:14,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:09:14,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 620 [2022-12-13 18:09:14,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand