./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS --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 fd7555e2b4abe63429c1be22a8b482f63bbf931ffcb895a158eac84b789e7c88 --- 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-4e7fbc6 [2022-11-23 03:57:36,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:57:36,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:57:36,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:57:36,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:57:36,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:57:36,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:57:36,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:57:36,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:57:36,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:57:36,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:57:36,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:57:36,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:57:36,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:57:36,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:57:36,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:57:36,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:57:36,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:57:36,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:57:36,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:57:36,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:57:36,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:57:36,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:57:36,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:57:36,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:57:36,200 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:57:36,200 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:57:36,201 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:57:36,202 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:57:36,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:57:36,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:57:36,204 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:57:36,204 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:57:36,205 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:57:36,206 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:57:36,206 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:57:36,207 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:57:36,207 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:57:36,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:57:36,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:57:36,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:57:36,213 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-23 03:57:36,258 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:57:36,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:57:36,259 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:57:36,259 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:57:36,260 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:57:36,260 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:57:36,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:57:36,261 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:57:36,261 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:57:36,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:57:36,262 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:57:36,262 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 03:57:36,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:57:36,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:57:36,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:57:36,263 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 03:57:36,263 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 03:57:36,264 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 03:57:36,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:57:36,264 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 03:57:36,264 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:57:36,264 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:57:36,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:57:36,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:57:36,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:57:36,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:57:36,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:57:36,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:57:36,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:57:36,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:57:36,266 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:57:36,266 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:57:36,267 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:57:36,267 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_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd7555e2b4abe63429c1be22a8b482f63bbf931ffcb895a158eac84b789e7c88 [2022-11-23 03:57:36,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:57:36,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:57:36,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:57:36,578 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:57:36,579 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:57:36,580 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-20.i [2022-11-23 03:57:39,583 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:57:39,933 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:57:39,934 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-20.i [2022-11-23 03:57:39,950 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/data/260d0083a/4831dca8d18f463fa8b22eb69b1acdb1/FLAG76186deb7 [2022-11-23 03:57:39,978 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/data/260d0083a/4831dca8d18f463fa8b22eb69b1acdb1 [2022-11-23 03:57:39,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:57:39,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:57:39,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:57:39,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:57:39,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:57:39,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:57:39" (1/1) ... [2022-11-23 03:57:39,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61a3f7cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:39, skipping insertion in model container [2022-11-23 03:57:39,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:57:39" (1/1) ... [2022-11-23 03:57:40,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:57:40,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:57:40,403 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_a0ed22e6-e637-45d0-ac82-015ea966c60a/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-20.i[30190,30203] [2022-11-23 03:57:40,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:57:40,447 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:57:40,498 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_a0ed22e6-e637-45d0-ac82-015ea966c60a/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-20.i[30190,30203] [2022-11-23 03:57:40,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:57:40,545 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:57:40,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:40 WrapperNode [2022-11-23 03:57:40,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:57:40,546 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:57:40,547 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:57:40,547 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:57:40,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:40" (1/1) ... [2022-11-23 03:57:40,580 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:40" (1/1) ... [2022-11-23 03:57:40,599 INFO L138 Inliner]: procedures = 163, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 71 [2022-11-23 03:57:40,599 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:57:40,600 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:57:40,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:57:40,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:57:40,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:40" (1/1) ... [2022-11-23 03:57:40,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:40" (1/1) ... [2022-11-23 03:57:40,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:40" (1/1) ... [2022-11-23 03:57:40,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:40" (1/1) ... [2022-11-23 03:57:40,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:40" (1/1) ... [2022-11-23 03:57:40,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:40" (1/1) ... [2022-11-23 03:57:40,623 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:40" (1/1) ... [2022-11-23 03:57:40,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:40" (1/1) ... [2022-11-23 03:57:40,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:57:40,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:57:40,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:57:40,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:57:40,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:40" (1/1) ... [2022-11-23 03:57:40,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:57:40,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:57:40,673 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:57:40,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:57:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 03:57:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure setThread [2022-11-23 03:57:40,720 INFO L138 BoogieDeclarations]: Found implementation of procedure setThread [2022-11-23 03:57:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:57:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 03:57:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:57:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:57:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:57:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure checkThread [2022-11-23 03:57:40,722 INFO L138 BoogieDeclarations]: Found implementation of procedure checkThread [2022-11-23 03:57:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:57:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 03:57:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:57:40,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:57:40,724 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 03:57:40,855 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:57:40,864 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:57:41,092 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:57:41,098 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:57:41,099 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 03:57:41,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:57:41 BoogieIcfgContainer [2022-11-23 03:57:41,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:57:41,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:57:41,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:57:41,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:57:41,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:57:39" (1/3) ... [2022-11-23 03:57:41,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f2fde86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:57:41, skipping insertion in model container [2022-11-23 03:57:41,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:40" (2/3) ... [2022-11-23 03:57:41,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f2fde86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:57:41, skipping insertion in model container [2022-11-23 03:57:41,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:57:41" (3/3) ... [2022-11-23 03:57:41,117 INFO L112 eAbstractionObserver]: Analyzing ICFG reorder_c11_bad-20.i [2022-11-23 03:57:41,132 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:57:41,132 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-23 03:57:41,132 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 03:57:41,209 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-23 03:57:41,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 103 transitions, 228 flow [2022-11-23 03:57:41,418 INFO L130 PetriNetUnfolder]: 24/243 cut-off events. [2022-11-23 03:57:41,418 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-23 03:57:41,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 243 events. 24/243 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 890 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 126. Up to 8 conditions per place. [2022-11-23 03:57:41,425 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 103 transitions, 228 flow [2022-11-23 03:57:41,434 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 103 transitions, 228 flow [2022-11-23 03:57:41,438 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:57:41,454 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 103 transitions, 228 flow [2022-11-23 03:57:41,457 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 103 transitions, 228 flow [2022-11-23 03:57:41,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 103 transitions, 228 flow [2022-11-23 03:57:41,517 INFO L130 PetriNetUnfolder]: 24/243 cut-off events. [2022-11-23 03:57:41,526 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-23 03:57:41,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 243 events. 24/243 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 890 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 126. Up to 8 conditions per place. [2022-11-23 03:57:41,534 INFO L119 LiptonReduction]: Number of co-enabled transitions 1488 [2022-11-23 03:57:45,030 INFO L134 LiptonReduction]: Checked pairs total: 2714 [2022-11-23 03:57:45,030 INFO L136 LiptonReduction]: Total number of compositions: 89 [2022-11-23 03:57:45,046 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:57:45,052 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;@7a29d4f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:57:45,053 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-11-23 03:57:45,054 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-11-23 03:57:45,055 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:57:45,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:57:45,056 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:57:45,056 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 03:57:45,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:57:45,067 INFO L85 PathProgramCache]: Analyzing trace with hash 12139, now seen corresponding path program 1 times [2022-11-23 03:57:45,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:57:45,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999861092] [2022-11-23 03:57:45,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:57:45,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:57:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:57:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:57:45,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:57:45,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999861092] [2022-11-23 03:57:45,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999861092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:57:45,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:57:45,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:57:45,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051922357] [2022-11-23 03:57:45,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:57:45,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:57:45,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:57:45,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:57:45,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:57:45,501 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2022-11-23 03:57:45,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:45,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:57:45,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2022-11-23 03:57:45,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:57:45,713 INFO L130 PetriNetUnfolder]: 244/511 cut-off events. [2022-11-23 03:57:45,713 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-23 03:57:45,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1038 conditions, 511 events. 244/511 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2490 event pairs, 196 based on Foata normal form. 0/301 useless extension candidates. Maximal degree in co-relation 794. Up to 429 conditions per place. [2022-11-23 03:57:45,722 INFO L137 encePairwiseOnDemand]: 187/192 looper letters, 31 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2022-11-23 03:57:45,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 38 transitions, 166 flow [2022-11-23 03:57:45,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:57:45,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:57:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2022-11-23 03:57:45,747 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2022-11-23 03:57:45,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2022-11-23 03:57:45,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2022-11-23 03:57:45,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:57:45,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2022-11-23 03:57:45,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:45,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:45,770 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:45,772 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 94 flow. Second operand 3 states and 282 transitions. [2022-11-23 03:57:45,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 38 transitions, 166 flow [2022-11-23 03:57:45,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 166 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 03:57:45,783 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 96 flow [2022-11-23 03:57:45,785 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2022-11-23 03:57:45,789 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2022-11-23 03:57:45,790 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 96 flow [2022-11-23 03:57:45,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:45,790 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:57:45,790 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:57:45,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:57:45,791 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 03:57:45,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:57:45,794 INFO L85 PathProgramCache]: Analyzing trace with hash 12138, now seen corresponding path program 1 times [2022-11-23 03:57:45,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:57:45,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688088254] [2022-11-23 03:57:45,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:57:45,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:57:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:57:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:57:45,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:57:45,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688088254] [2022-11-23 03:57:45,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688088254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:57:45,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:57:45,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:57:45,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435806293] [2022-11-23 03:57:46,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:57:46,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:57:46,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:57:46,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:57:46,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:57:46,099 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 192 [2022-11-23 03:57:46,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:46,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:57:46,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 192 [2022-11-23 03:57:46,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:57:46,210 INFO L130 PetriNetUnfolder]: 232/481 cut-off events. [2022-11-23 03:57:46,210 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-23 03:57:46,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1010 conditions, 481 events. 232/481 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2219 event pairs, 100 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 842. Up to 457 conditions per place. [2022-11-23 03:57:46,215 INFO L137 encePairwiseOnDemand]: 188/192 looper letters, 31 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2022-11-23 03:57:46,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 168 flow [2022-11-23 03:57:46,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:57:46,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:57:46,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2022-11-23 03:57:46,219 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4670138888888889 [2022-11-23 03:57:46,219 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2022-11-23 03:57:46,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2022-11-23 03:57:46,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:57:46,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2022-11-23 03:57:46,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:46,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:46,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:46,225 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 96 flow. Second operand 3 states and 269 transitions. [2022-11-23 03:57:46,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 168 flow [2022-11-23 03:57:46,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 37 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:57:46,230 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 100 flow [2022-11-23 03:57:46,230 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2022-11-23 03:57:46,231 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2022-11-23 03:57:46,231 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 100 flow [2022-11-23 03:57:46,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:46,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:57:46,232 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 03:57:46,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 03:57:46,233 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 03:57:46,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:57:46,236 INFO L85 PathProgramCache]: Analyzing trace with hash 361829227, now seen corresponding path program 1 times [2022-11-23 03:57:46,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:57:46,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595537564] [2022-11-23 03:57:46,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:57:46,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:57:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:57:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:57:46,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:57:46,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595537564] [2022-11-23 03:57:46,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595537564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:57:46,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454409662] [2022-11-23 03:57:46,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:57:46,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:57:46,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:57:46,446 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:57:46,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 03:57:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:57:46,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 03:57:46,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:57:46,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:57:46,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-23 03:57:46,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 03:57:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:57:46,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:57:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:57:46,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454409662] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:57:46,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:57:46,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-23 03:57:46,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794564255] [2022-11-23 03:57:46,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:57:46,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 03:57:46,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:57:46,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 03:57:46,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-23 03:57:47,085 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 192 [2022-11-23 03:57:47,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 100 flow. Second operand has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:47,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:57:47,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 192 [2022-11-23 03:57:47,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:57:47,120 INFO L130 PetriNetUnfolder]: 4/18 cut-off events. [2022-11-23 03:57:47,120 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:57:47,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 18 events. 4/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs, 0 based on Foata normal form. 3/21 useless extension candidates. Maximal degree in co-relation 45. Up to 10 conditions per place. [2022-11-23 03:57:47,121 INFO L137 encePairwiseOnDemand]: 188/192 looper letters, 7 selfloop transitions, 2 changer transitions 0/10 dead transitions. [2022-11-23 03:57:47,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 10 transitions, 49 flow [2022-11-23 03:57:47,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:57:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 03:57:47,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 283 transitions. [2022-11-23 03:57:47,123 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3684895833333333 [2022-11-23 03:57:47,123 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 283 transitions. [2022-11-23 03:57:47,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 283 transitions. [2022-11-23 03:57:47,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:57:47,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 283 transitions. [2022-11-23 03:57:47,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:47,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:47,127 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:47,127 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 100 flow. Second operand 4 states and 283 transitions. [2022-11-23 03:57:47,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 10 transitions, 49 flow [2022-11-23 03:57:47,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 10 transitions, 43 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 03:57:47,129 INFO L231 Difference]: Finished difference. Result has 14 places, 7 transitions, 23 flow [2022-11-23 03:57:47,129 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=23, PETRI_PLACES=14, PETRI_TRANSITIONS=7} [2022-11-23 03:57:47,130 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, -23 predicate places. [2022-11-23 03:57:47,130 INFO L495 AbstractCegarLoop]: Abstraction has has 14 places, 7 transitions, 23 flow [2022-11-23 03:57:47,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:47,131 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:57:47,131 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-23 03:57:47,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 03:57:47,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:57:47,336 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 03:57:47,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:57:47,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1668195628, now seen corresponding path program 1 times [2022-11-23 03:57:47,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:57:47,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780956569] [2022-11-23 03:57:47,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:57:47,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:57:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:57:47,353 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 03:57:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:57:47,382 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-23 03:57:47,383 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 03:57:47,387 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2022-11-23 03:57:47,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (11 of 13 remaining) [2022-11-23 03:57:47,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2022-11-23 03:57:47,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2022-11-23 03:57:47,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2022-11-23 03:57:47,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2022-11-23 03:57:47,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2022-11-23 03:57:47,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2022-11-23 03:57:47,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2022-11-23 03:57:47,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 13 remaining) [2022-11-23 03:57:47,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (2 of 13 remaining) [2022-11-23 03:57:47,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 13 remaining) [2022-11-23 03:57:47,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2022-11-23 03:57:47,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 03:57:47,395 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-23 03:57:47,398 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 03:57:47,398 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-23 03:57:47,440 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-23 03:57:47,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 122 transitions, 292 flow [2022-11-23 03:57:47,546 INFO L130 PetriNetUnfolder]: 107/793 cut-off events. [2022-11-23 03:57:47,546 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-11-23 03:57:47,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 793 events. 107/793 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4292 event pairs, 2 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 468. Up to 32 conditions per place. [2022-11-23 03:57:47,549 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 122 transitions, 292 flow [2022-11-23 03:57:47,552 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 122 transitions, 292 flow [2022-11-23 03:57:47,553 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:57:47,553 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 122 transitions, 292 flow [2022-11-23 03:57:47,553 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 122 transitions, 292 flow [2022-11-23 03:57:47,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 122 transitions, 292 flow [2022-11-23 03:57:47,656 INFO L130 PetriNetUnfolder]: 107/793 cut-off events. [2022-11-23 03:57:47,656 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-11-23 03:57:47,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 793 events. 107/793 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4292 event pairs, 2 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 468. Up to 32 conditions per place. [2022-11-23 03:57:47,667 INFO L119 LiptonReduction]: Number of co-enabled transitions 3568 [2022-11-23 03:57:50,797 INFO L134 LiptonReduction]: Checked pairs total: 7587 [2022-11-23 03:57:50,797 INFO L136 LiptonReduction]: Total number of compositions: 97 [2022-11-23 03:57:50,799 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:57:50,800 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;@7a29d4f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:57:50,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-11-23 03:57:50,801 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-11-23 03:57:50,801 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:57:50,802 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:57:50,802 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:57:50,802 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-23 03:57:50,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:57:50,802 INFO L85 PathProgramCache]: Analyzing trace with hash 19704, now seen corresponding path program 1 times [2022-11-23 03:57:50,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:57:50,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835984694] [2022-11-23 03:57:50,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:57:50,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:57:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:57:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:57:50,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:57:50,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835984694] [2022-11-23 03:57:50,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835984694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:57:50,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:57:50,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:57:50,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68971657] [2022-11-23 03:57:50,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:57:50,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:57:50,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:57:50,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:57:50,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:57:50,935 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 219 [2022-11-23 03:57:50,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:50,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:57:50,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 219 [2022-11-23 03:57:50,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:57:52,385 INFO L130 PetriNetUnfolder]: 7826/11957 cut-off events. [2022-11-23 03:57:52,386 INFO L131 PetriNetUnfolder]: For 1002/1002 co-relation queries the response was YES. [2022-11-23 03:57:52,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24263 conditions, 11957 events. 7826/11957 cut-off events. For 1002/1002 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 69897 event pairs, 5448 based on Foata normal form. 0/7809 useless extension candidates. Maximal degree in co-relation 7512. Up to 11562 conditions per place. [2022-11-23 03:57:52,469 INFO L137 encePairwiseOnDemand]: 215/219 looper letters, 45 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2022-11-23 03:57:52,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 53 transitions, 248 flow [2022-11-23 03:57:52,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:57:52,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:57:52,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 316 transitions. [2022-11-23 03:57:52,474 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4809741248097412 [2022-11-23 03:57:52,474 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 316 transitions. [2022-11-23 03:57:52,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 316 transitions. [2022-11-23 03:57:52,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:57:52,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 316 transitions. [2022-11-23 03:57:52,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:52,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:52,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:52,478 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 144 flow. Second operand 3 states and 316 transitions. [2022-11-23 03:57:52,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 53 transitions, 248 flow [2022-11-23 03:57:52,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 53 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 03:57:52,484 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 158 flow [2022-11-23 03:57:52,484 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2022-11-23 03:57:52,486 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2022-11-23 03:57:52,486 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 158 flow [2022-11-23 03:57:52,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:52,487 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:57:52,487 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:57:52,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 03:57:52,487 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-23 03:57:52,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:57:52,488 INFO L85 PathProgramCache]: Analyzing trace with hash 19703, now seen corresponding path program 1 times [2022-11-23 03:57:52,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:57:52,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81479067] [2022-11-23 03:57:52,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:57:52,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:57:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:57:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:57:52,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:57:52,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81479067] [2022-11-23 03:57:52,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81479067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:57:52,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:57:52,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:57:52,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470661443] [2022-11-23 03:57:52,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:57:52,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:57:52,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:57:52,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:57:52,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:57:52,584 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2022-11-23 03:57:52,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:52,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:57:52,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2022-11-23 03:57:52,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:57:53,844 INFO L130 PetriNetUnfolder]: 7300/11162 cut-off events. [2022-11-23 03:57:53,844 INFO L131 PetriNetUnfolder]: For 1026/1026 co-relation queries the response was YES. [2022-11-23 03:57:53,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22715 conditions, 11162 events. 7300/11162 cut-off events. For 1026/1026 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 64931 event pairs, 5876 based on Foata normal form. 0/7423 useless extension candidates. Maximal degree in co-relation 22681. Up to 9236 conditions per place. [2022-11-23 03:57:53,914 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 46 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2022-11-23 03:57:53,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 55 transitions, 268 flow [2022-11-23 03:57:53,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:57:53,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:57:53,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2022-11-23 03:57:53,917 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5007610350076104 [2022-11-23 03:57:53,917 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2022-11-23 03:57:53,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2022-11-23 03:57:53,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:57:53,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2022-11-23 03:57:53,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:53,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:53,921 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:53,921 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 158 flow. Second operand 3 states and 329 transitions. [2022-11-23 03:57:53,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 55 transitions, 268 flow [2022-11-23 03:57:53,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 55 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:57:53,927 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 158 flow [2022-11-23 03:57:53,928 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2022-11-23 03:57:53,931 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2022-11-23 03:57:53,931 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 158 flow [2022-11-23 03:57:53,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:53,932 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:57:53,932 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 03:57:53,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 03:57:53,932 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-23 03:57:53,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:57:53,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1029969640, now seen corresponding path program 1 times [2022-11-23 03:57:53,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:57:53,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534603819] [2022-11-23 03:57:53,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:57:53,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:57:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:57:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:57:54,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:57:54,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534603819] [2022-11-23 03:57:54,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534603819] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:57:54,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414795793] [2022-11-23 03:57:54,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:57:54,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:57:54,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:57:54,075 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:57:54,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 03:57:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:57:54,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 03:57:54,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:57:54,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:57:54,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-23 03:57:54,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 03:57:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:57:54,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:57:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:57:54,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414795793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:57:54,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:57:54,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-23 03:57:54,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520061437] [2022-11-23 03:57:54,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:57:54,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:57:54,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:57:54,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:57:54,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:57:54,509 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 219 [2022-11-23 03:57:54,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 158 flow. Second operand has 8 states, 8 states have (on average 80.875) internal successors, (647), 8 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:54,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:57:54,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 219 [2022-11-23 03:57:54,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:57:55,767 INFO L130 PetriNetUnfolder]: 6933/10585 cut-off events. [2022-11-23 03:57:55,768 INFO L131 PetriNetUnfolder]: For 978/978 co-relation queries the response was YES. [2022-11-23 03:57:55,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22023 conditions, 10585 events. 6933/10585 cut-off events. For 978/978 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 59607 event pairs, 2791 based on Foata normal form. 3/7342 useless extension candidates. Maximal degree in co-relation 18427. Up to 8810 conditions per place. [2022-11-23 03:57:55,821 INFO L137 encePairwiseOnDemand]: 213/219 looper letters, 54 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2022-11-23 03:57:55,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 66 transitions, 314 flow [2022-11-23 03:57:55,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:57:55,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:57:55,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 537 transitions. [2022-11-23 03:57:55,824 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.408675799086758 [2022-11-23 03:57:55,824 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 537 transitions. [2022-11-23 03:57:55,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 537 transitions. [2022-11-23 03:57:55,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:57:55,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 537 transitions. [2022-11-23 03:57:55,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:55,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:55,832 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:55,832 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 158 flow. Second operand 6 states and 537 transitions. [2022-11-23 03:57:55,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 66 transitions, 314 flow [2022-11-23 03:57:55,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:57:55,853 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 160 flow [2022-11-23 03:57:55,853 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2022-11-23 03:57:55,855 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2022-11-23 03:57:55,855 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 160 flow [2022-11-23 03:57:55,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 80.875) internal successors, (647), 8 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:55,855 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:57:55,856 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-23 03:57:55,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 03:57:56,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0ed22e6-e637-45d0-ac82-015ea966c60a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 03:57:56,062 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-23 03:57:56,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:57:56,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1354118329, now seen corresponding path program 1 times [2022-11-23 03:57:56,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:57:56,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612489791] [2022-11-23 03:57:56,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:57:56,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:57:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:57:56,077 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 03:57:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:57:56,096 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-23 03:57:56,096 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 03:57:56,096 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 14 remaining) [2022-11-23 03:57:56,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (12 of 14 remaining) [2022-11-23 03:57:56,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2022-11-23 03:57:56,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2022-11-23 03:57:56,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2022-11-23 03:57:56,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2022-11-23 03:57:56,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2022-11-23 03:57:56,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 14 remaining) [2022-11-23 03:57:56,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2022-11-23 03:57:56,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2022-11-23 03:57:56,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (3 of 14 remaining) [2022-11-23 03:57:56,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 14 remaining) [2022-11-23 03:57:56,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 14 remaining) [2022-11-23 03:57:56,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 14 remaining) [2022-11-23 03:57:56,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 03:57:56,099 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-23 03:57:56,100 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 03:57:56,100 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-23 03:57:56,134 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2022-11-23 03:57:56,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 141 transitions, 360 flow [2022-11-23 03:57:56,532 INFO L130 PetriNetUnfolder]: 496/2769 cut-off events. [2022-11-23 03:57:56,533 INFO L131 PetriNetUnfolder]: For 419/419 co-relation queries the response was YES. [2022-11-23 03:57:56,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3220 conditions, 2769 events. 496/2769 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 20313 event pairs, 64 based on Foata normal form. 0/2089 useless extension candidates. Maximal degree in co-relation 1654. Up to 192 conditions per place. [2022-11-23 03:57:56,545 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 141 transitions, 360 flow [2022-11-23 03:57:56,558 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 141 transitions, 360 flow [2022-11-23 03:57:56,558 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:57:56,558 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 141 transitions, 360 flow [2022-11-23 03:57:56,559 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 141 transitions, 360 flow [2022-11-23 03:57:56,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 141 transitions, 360 flow [2022-11-23 03:57:56,927 INFO L130 PetriNetUnfolder]: 496/2769 cut-off events. [2022-11-23 03:57:56,927 INFO L131 PetriNetUnfolder]: For 419/419 co-relation queries the response was YES. [2022-11-23 03:57:56,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3220 conditions, 2769 events. 496/2769 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 20313 event pairs, 64 based on Foata normal form. 0/2089 useless extension candidates. Maximal degree in co-relation 1654. Up to 192 conditions per place. [2022-11-23 03:57:56,988 INFO L119 LiptonReduction]: Number of co-enabled transitions 6240 [2022-11-23 03:58:00,623 INFO L134 LiptonReduction]: Checked pairs total: 14710 [2022-11-23 03:58:00,623 INFO L136 LiptonReduction]: Total number of compositions: 112 [2022-11-23 03:58:00,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:58:00,627 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;@7a29d4f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:58:00,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-11-23 03:58:00,628 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2022-11-23 03:58:00,628 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:58:00,629 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:58:00,629 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:58:00,629 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 03:58:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:58:00,630 INFO L85 PathProgramCache]: Analyzing trace with hash 28342, now seen corresponding path program 1 times [2022-11-23 03:58:00,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:58:00,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546557782] [2022-11-23 03:58:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:58:00,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:58:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:58:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:58:00,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:58:00,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546557782] [2022-11-23 03:58:00,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546557782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:58:00,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:58:00,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:58:00,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200973989] [2022-11-23 03:58:00,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:58:00,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:58:00,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:58:00,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:58:00,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:58:00,780 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 253 [2022-11-23 03:58:00,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:58:00,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:58:00,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 253 [2022-11-23 03:58:00,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:58:20,582 INFO L130 PetriNetUnfolder]: 177468/238689 cut-off events. [2022-11-23 03:58:20,582 INFO L131 PetriNetUnfolder]: For 25743/25743 co-relation queries the response was YES. [2022-11-23 03:58:20,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487066 conditions, 238689 events. 177468/238689 cut-off events. For 25743/25743 co-relation queries the response was YES. Maximal size of possible extension queue 4739. Compared 1548525 event pairs, 139794 based on Foata normal form. 0/163167 useless extension candidates. Maximal degree in co-relation 110128. Up to 233116 conditions per place. [2022-11-23 03:58:21,732 INFO L137 encePairwiseOnDemand]: 249/253 looper letters, 55 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2022-11-23 03:58:21,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 63 transitions, 318 flow [2022-11-23 03:58:21,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:58:21,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:58:21,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2022-11-23 03:58:21,735 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47299077733860345 [2022-11-23 03:58:21,735 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2022-11-23 03:58:21,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2022-11-23 03:58:21,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:58:21,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2022-11-23 03:58:21,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:58:21,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:58:21,739 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:58:21,739 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 194 flow. Second operand 3 states and 359 transitions. [2022-11-23 03:58:21,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 63 transitions, 318 flow [2022-11-23 03:58:21,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 63 transitions, 318 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 03:58:21,758 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 208 flow [2022-11-23 03:58:21,758 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2022-11-23 03:58:21,760 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2022-11-23 03:58:21,760 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 208 flow [2022-11-23 03:58:21,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:58:21,761 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:58:21,761 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:58:21,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 03:58:21,761 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 03:58:21,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:58:21,762 INFO L85 PathProgramCache]: Analyzing trace with hash 28341, now seen corresponding path program 1 times [2022-11-23 03:58:21,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:58:21,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349542230] [2022-11-23 03:58:21,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:58:21,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:58:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:58:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:58:21,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:58:21,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349542230] [2022-11-23 03:58:21,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349542230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:58:21,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:58:21,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:58:21,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677153475] [2022-11-23 03:58:21,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:58:21,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:58:21,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:58:21,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:58:21,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:58:21,855 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 253 [2022-11-23 03:58:21,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:58:21,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:58:21,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 253 [2022-11-23 03:58:21,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand