./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_94-alloc_region_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f952429e-9646-4843-b43a-11e1476f5089/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f952429e-9646-4843-b43a-11e1476f5089/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f952429e-9646-4843-b43a-11e1476f5089/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f952429e-9646-4843-b43a-11e1476f5089/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_94-alloc_region_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f952429e-9646-4843-b43a-11e1476f5089/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f952429e-9646-4843-b43a-11e1476f5089/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7faac9952fd378b53dcd8f21391daa9cc75834f7be2a5ad0c70d96fc8524bd08 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:13:40,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:13:40,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:13:40,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:13:40,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:13:40,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:13:40,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:13:40,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:13:40,096 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:13:40,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:13:40,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:13:40,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:13:40,102 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:13:40,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:13:40,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:13:40,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:13:40,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:13:40,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:13:40,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:13:40,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:13:40,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:13:40,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:13:40,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:13:40,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:13:40,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:13:40,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:13:40,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:13:40,149 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:13:40,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:13:40,151 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:13:40,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:13:40,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:13:40,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:13:40,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:13:40,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:13:40,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:13:40,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:13:40,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:13:40,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:13:40,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:13:40,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:13:40,168 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f952429e-9646-4843-b43a-11e1476f5089/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:13:40,213 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:13:40,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:13:40,218 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:13:40,218 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:13:40,219 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:13:40,219 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:13:40,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:13:40,221 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:13:40,221 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:13:40,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:13:40,223 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:13:40,223 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:13:40,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:13:40,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:13:40,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:13:40,224 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:13:40,224 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:13:40,225 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:13:40,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:13:40,225 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:13:40,225 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:13:40,226 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:13:40,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:13:40,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:13:40,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:13:40,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:13:40,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:13:40,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:13:40,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:13:40,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:13:40,229 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:13:40,229 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:13:40,230 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:13:40,230 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_f952429e-9646-4843-b43a-11e1476f5089/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f952429e-9646-4843-b43a-11e1476f5089/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7faac9952fd378b53dcd8f21391daa9cc75834f7be2a5ad0c70d96fc8524bd08 [2022-11-25 18:13:40,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:13:40,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:13:40,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:13:40,646 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:13:40,647 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:13:40,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f952429e-9646-4843-b43a-11e1476f5089/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_94-alloc_region_racing.i [2022-11-25 18:13:43,900 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:13:44,298 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:13:44,299 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f952429e-9646-4843-b43a-11e1476f5089/sv-benchmarks/c/goblint-regression/28-race_reach_94-alloc_region_racing.i [2022-11-25 18:13:44,318 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f952429e-9646-4843-b43a-11e1476f5089/bin/uautomizer-ZsLfNo2U6R/data/6e5018c96/0e8ad7dbae7e4fe6b5bd8d0ebf34240f/FLAGb0e9ba468 [2022-11-25 18:13:44,334 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f952429e-9646-4843-b43a-11e1476f5089/bin/uautomizer-ZsLfNo2U6R/data/6e5018c96/0e8ad7dbae7e4fe6b5bd8d0ebf34240f [2022-11-25 18:13:44,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:13:44,338 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:13:44,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:13:44,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:13:44,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:13:44,345 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:13:44" (1/1) ... [2022-11-25 18:13:44,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8e80eb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:44, skipping insertion in model container [2022-11-25 18:13:44,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:13:44" (1/1) ... [2022-11-25 18:13:44,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:13:44,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:13:45,063 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_f952429e-9646-4843-b43a-11e1476f5089/sv-benchmarks/c/goblint-regression/28-race_reach_94-alloc_region_racing.i[58135,58148] [2022-11-25 18:13:45,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:13:45,113 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:13:45,169 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_f952429e-9646-4843-b43a-11e1476f5089/sv-benchmarks/c/goblint-regression/28-race_reach_94-alloc_region_racing.i[58135,58148] [2022-11-25 18:13:45,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:13:45,277 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:13:45,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:45 WrapperNode [2022-11-25 18:13:45,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:13:45,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:13:45,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:13:45,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:13:45,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:45" (1/1) ... [2022-11-25 18:13:45,333 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:45" (1/1) ... [2022-11-25 18:13:45,384 INFO L138 Inliner]: procedures = 377, calls = 72, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 236 [2022-11-25 18:13:45,392 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:13:45,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:13:45,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:13:45,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:13:45,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:45" (1/1) ... [2022-11-25 18:13:45,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:45" (1/1) ... [2022-11-25 18:13:45,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:45" (1/1) ... [2022-11-25 18:13:45,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:45" (1/1) ... [2022-11-25 18:13:45,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:45" (1/1) ... [2022-11-25 18:13:45,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:45" (1/1) ... [2022-11-25 18:13:45,469 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:45" (1/1) ... [2022-11-25 18:13:45,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:45" (1/1) ... [2022-11-25 18:13:45,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:13:45,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:13:45,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:13:45,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:13:45,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:45" (1/1) ... [2022-11-25 18:13:45,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:13:45,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f952429e-9646-4843-b43a-11e1476f5089/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:13:45,534 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f952429e-9646-4843-b43a-11e1476f5089/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:13:45,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f952429e-9646-4843-b43a-11e1476f5089/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:13:45,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:13:45,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 18:13:45,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:13:45,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 18:13:45,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:13:45,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:13:45,677 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 18:13:45,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:13:45,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:13:45,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 18:13:45,679 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-25 18:13:45,681 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-25 18:13:45,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:13:45,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:13:45,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:13:45,683 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:13:45,837 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:13:45,840 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:13:46,544 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:13:46,555 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:13:46,555 INFO L300 CfgBuilder]: Removed 23 assume(true) statements. [2022-11-25 18:13:46,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:13:46 BoogieIcfgContainer [2022-11-25 18:13:46,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:13:46,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:13:46,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:13:46,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:13:46,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:13:44" (1/3) ... [2022-11-25 18:13:46,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b4af689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:13:46, skipping insertion in model container [2022-11-25 18:13:46,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:45" (2/3) ... [2022-11-25 18:13:46,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b4af689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:13:46, skipping insertion in model container [2022-11-25 18:13:46,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:13:46" (3/3) ... [2022-11-25 18:13:46,586 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_94-alloc_region_racing.i [2022-11-25 18:13:46,606 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:13:46,606 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 61 error locations. [2022-11-25 18:13:46,606 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:13:46,805 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-25 18:13:46,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 316 transitions, 640 flow [2022-11-25 18:13:47,150 INFO L130 PetriNetUnfolder]: 45/457 cut-off events. [2022-11-25 18:13:47,150 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:13:47,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 457 events. 45/457 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1747 event pairs, 0 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 248. Up to 8 conditions per place. [2022-11-25 18:13:47,164 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 316 transitions, 640 flow [2022-11-25 18:13:47,176 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 316 transitions, 640 flow [2022-11-25 18:13:47,181 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:13:47,208 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 316 transitions, 640 flow [2022-11-25 18:13:47,211 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 316 transitions, 640 flow [2022-11-25 18:13:47,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 316 transitions, 640 flow [2022-11-25 18:13:47,338 INFO L130 PetriNetUnfolder]: 45/457 cut-off events. [2022-11-25 18:13:47,338 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:13:47,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 457 events. 45/457 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1747 event pairs, 0 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 248. Up to 8 conditions per place. [2022-11-25 18:13:47,360 INFO L119 LiptonReduction]: Number of co-enabled transitions 29988 [2022-11-25 18:15:01,988 INFO L134 LiptonReduction]: Checked pairs total: 107743 [2022-11-25 18:15:01,989 INFO L136 LiptonReduction]: Total number of compositions: 294 [2022-11-25 18:15:02,006 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:15:02,019 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;@54367d26, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:15:02,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 83 error locations. [2022-11-25 18:15:02,021 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 18:15:02,021 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:15:02,023 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:02,024 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 18:15:02,025 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-25 18:15:02,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:02,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1175, now seen corresponding path program 1 times [2022-11-25 18:15:02,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:02,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630779230] [2022-11-25 18:15:02,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:02,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:02,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:02,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630779230] [2022-11-25 18:15:02,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630779230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:02,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:02,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 18:15:02,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453361757] [2022-11-25 18:15:02,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:02,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:15:02,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:02,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:15:02,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:15:02,263 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 610 [2022-11-25 18:15:02,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 149 transitions, 306 flow. Second operand has 2 states, 2 states have (on average 287.5) internal successors, (575), 2 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:02,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:02,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 610 [2022-11-25 18:15:02,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:03,060 INFO L130 PetriNetUnfolder]: 1635/3854 cut-off events. [2022-11-25 18:15:03,061 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:15:03,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7060 conditions, 3854 events. 1635/3854 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 28011 event pairs, 1518 based on Foata normal form. 246/2572 useless extension candidates. Maximal degree in co-relation 6935. Up to 3200 conditions per place. [2022-11-25 18:15:03,083 INFO L137 encePairwiseOnDemand]: 576/610 looper letters, 84 selfloop transitions, 0 changer transitions 0/115 dead transitions. [2022-11-25 18:15:03,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 115 transitions, 406 flow [2022-11-25 18:15:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:15:03,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:15:03,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 692 transitions. [2022-11-25 18:15:03,100 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5672131147540984 [2022-11-25 18:15:03,101 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 692 transitions. [2022-11-25 18:15:03,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 692 transitions. [2022-11-25 18:15:03,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:03,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 692 transitions. [2022-11-25 18:15:03,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 346.0) internal successors, (692), 2 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:03,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 610.0) internal successors, (1830), 3 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:03,121 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 610.0) internal successors, (1830), 3 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:03,123 INFO L175 Difference]: Start difference. First operand has 126 places, 149 transitions, 306 flow. Second operand 2 states and 692 transitions. [2022-11-25 18:15:03,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 115 transitions, 406 flow [2022-11-25 18:15:03,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 115 transitions, 406 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:15:03,131 INFO L231 Difference]: Finished difference. Result has 115 places, 115 transitions, 238 flow [2022-11-25 18:15:03,134 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=238, PETRI_PLACES=115, PETRI_TRANSITIONS=115} [2022-11-25 18:15:03,139 INFO L288 CegarLoopForPetriNet]: 126 programPoint places, -11 predicate places. [2022-11-25 18:15:03,139 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 115 transitions, 238 flow [2022-11-25 18:15:03,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 287.5) internal successors, (575), 2 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:03,140 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:03,140 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:15:03,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:15:03,141 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-25 18:15:03,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:03,144 INFO L85 PathProgramCache]: Analyzing trace with hash 37661, now seen corresponding path program 1 times [2022-11-25 18:15:03,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:03,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867042215] [2022-11-25 18:15:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:03,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:03,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:03,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867042215] [2022-11-25 18:15:03,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867042215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:03,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:03,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:15:03,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553271762] [2022-11-25 18:15:03,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:03,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:15:03,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:03,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:15:03,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:15:03,632 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 610 [2022-11-25 18:15:03,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 115 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:03,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:03,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 610 [2022-11-25 18:15:03,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:04,378 INFO L130 PetriNetUnfolder]: 1565/3723 cut-off events. [2022-11-25 18:15:04,378 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:15:04,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6794 conditions, 3723 events. 1565/3723 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 27125 event pairs, 1386 based on Foata normal form. 0/2289 useless extension candidates. Maximal degree in co-relation 6790. Up to 2927 conditions per place. [2022-11-25 18:15:04,398 INFO L137 encePairwiseOnDemand]: 606/610 looper letters, 113 selfloop transitions, 2 changer transitions 0/146 dead transitions. [2022-11-25 18:15:04,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 146 transitions, 530 flow [2022-11-25 18:15:04,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:15:04,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:15:04,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 954 transitions. [2022-11-25 18:15:04,402 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.521311475409836 [2022-11-25 18:15:04,402 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 954 transitions. [2022-11-25 18:15:04,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 954 transitions. [2022-11-25 18:15:04,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:04,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 954 transitions. [2022-11-25 18:15:04,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 318.0) internal successors, (954), 3 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:04,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:04,412 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:04,412 INFO L175 Difference]: Start difference. First operand has 115 places, 115 transitions, 238 flow. Second operand 3 states and 954 transitions. [2022-11-25 18:15:04,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 146 transitions, 530 flow [2022-11-25 18:15:04,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 146 transitions, 530 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:15:04,416 INFO L231 Difference]: Finished difference. Result has 115 places, 113 transitions, 238 flow [2022-11-25 18:15:04,417 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=115, PETRI_TRANSITIONS=113} [2022-11-25 18:15:04,417 INFO L288 CegarLoopForPetriNet]: 126 programPoint places, -11 predicate places. [2022-11-25 18:15:04,418 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 113 transitions, 238 flow [2022-11-25 18:15:04,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:04,419 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:04,419 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:15:04,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:15:04,419 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-25 18:15:04,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:04,420 INFO L85 PathProgramCache]: Analyzing trace with hash 37662, now seen corresponding path program 1 times [2022-11-25 18:15:04,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:04,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262552819] [2022-11-25 18:15:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:04,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:04,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:04,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262552819] [2022-11-25 18:15:04,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262552819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:04,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:04,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:15:04,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721106630] [2022-11-25 18:15:04,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:04,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:15:04,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:04,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:15:04,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:15:04,842 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 610 [2022-11-25 18:15:04,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 113 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:04,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:04,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 610 [2022-11-25 18:15:04,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:05,568 INFO L130 PetriNetUnfolder]: 1562/3663 cut-off events. [2022-11-25 18:15:05,569 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-25 18:15:05,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6732 conditions, 3663 events. 1562/3663 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 26443 event pairs, 1419 based on Foata normal form. 0/2304 useless extension candidates. Maximal degree in co-relation 6727. Up to 3022 conditions per place. [2022-11-25 18:15:05,590 INFO L137 encePairwiseOnDemand]: 605/610 looper letters, 82 selfloop transitions, 3 changer transitions 0/116 dead transitions. [2022-11-25 18:15:05,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 116 transitions, 414 flow [2022-11-25 18:15:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:15:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:15:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 924 transitions. [2022-11-25 18:15:05,594 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5049180327868853 [2022-11-25 18:15:05,594 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 924 transitions. [2022-11-25 18:15:05,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 924 transitions. [2022-11-25 18:15:05,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:05,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 924 transitions. [2022-11-25 18:15:05,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 308.0) internal successors, (924), 3 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:05,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:05,603 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:05,603 INFO L175 Difference]: Start difference. First operand has 115 places, 113 transitions, 238 flow. Second operand 3 states and 924 transitions. [2022-11-25 18:15:05,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 116 transitions, 414 flow [2022-11-25 18:15:05,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 116 transitions, 410 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:15:05,608 INFO L231 Difference]: Finished difference. Result has 116 places, 115 transitions, 255 flow [2022-11-25 18:15:05,609 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=255, PETRI_PLACES=116, PETRI_TRANSITIONS=115} [2022-11-25 18:15:05,610 INFO L288 CegarLoopForPetriNet]: 126 programPoint places, -10 predicate places. [2022-11-25 18:15:05,610 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 115 transitions, 255 flow [2022-11-25 18:15:05,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:05,611 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:05,611 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:15:05,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:15:05,612 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-25 18:15:05,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:05,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1122875270, now seen corresponding path program 1 times [2022-11-25 18:15:05,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:05,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060967122] [2022-11-25 18:15:05,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:05,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:05,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:05,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:05,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060967122] [2022-11-25 18:15:05,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060967122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:15:05,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665428021] [2022-11-25 18:15:05,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:05,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:05,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f952429e-9646-4843-b43a-11e1476f5089/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:05,774 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f952429e-9646-4843-b43a-11e1476f5089/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:05,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f952429e-9646-4843-b43a-11e1476f5089/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:15:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:05,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:15:05,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:06,075 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 18:15:06,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-25 18:15:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:06,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:06,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665428021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:15:06,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:15:06,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-25 18:15:06,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119028002] [2022-11-25 18:15:06,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:15:06,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:15:06,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:06,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:15:06,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:15:07,446 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 610 [2022-11-25 18:15:07,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 115 transitions, 255 flow. Second operand has 8 states, 8 states have (on average 276.875) internal successors, (2215), 8 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:07,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:07,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 610 [2022-11-25 18:15:07,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:08,588 INFO L130 PetriNetUnfolder]: 1447/3476 cut-off events. [2022-11-25 18:15:08,589 INFO L131 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2022-11-25 18:15:08,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6442 conditions, 3476 events. 1447/3476 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 26530 event pairs, 24 based on Foata normal form. 1/2219 useless extension candidates. Maximal degree in co-relation 6436. Up to 2705 conditions per place. [2022-11-25 18:15:08,619 INFO L137 encePairwiseOnDemand]: 605/610 looper letters, 143 selfloop transitions, 6 changer transitions 0/180 dead transitions. [2022-11-25 18:15:08,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 180 transitions, 681 flow [2022-11-25 18:15:08,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:15:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:15:08,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1802 transitions. [2022-11-25 18:15:08,626 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4923497267759563 [2022-11-25 18:15:08,626 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1802 transitions. [2022-11-25 18:15:08,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1802 transitions. [2022-11-25 18:15:08,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:08,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1802 transitions. [2022-11-25 18:15:08,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 300.3333333333333) internal successors, (1802), 6 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:08,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:08,644 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:08,644 INFO L175 Difference]: Start difference. First operand has 116 places, 115 transitions, 255 flow. Second operand 6 states and 1802 transitions. [2022-11-25 18:15:08,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 180 transitions, 681 flow [2022-11-25 18:15:08,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 180 transitions, 678 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:15:08,651 INFO L231 Difference]: Finished difference. Result has 119 places, 114 transitions, 260 flow [2022-11-25 18:15:08,651 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=119, PETRI_TRANSITIONS=114} [2022-11-25 18:15:08,652 INFO L288 CegarLoopForPetriNet]: 126 programPoint places, -7 predicate places. [2022-11-25 18:15:08,652 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 114 transitions, 260 flow [2022-11-25 18:15:08,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 276.875) internal successors, (2215), 8 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:08,654 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:08,654 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:15:08,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f952429e-9646-4843-b43a-11e1476f5089/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:15:08,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f952429e-9646-4843-b43a-11e1476f5089/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:08,860 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-25 18:15:08,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:08,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1122872981, now seen corresponding path program 1 times [2022-11-25 18:15:08,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:08,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324102083] [2022-11-25 18:15:08,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:08,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:09,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:09,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324102083] [2022-11-25 18:15:09,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324102083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:09,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:09,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:15:09,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174616406] [2022-11-25 18:15:09,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:09,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:15:09,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:09,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:15:09,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:15:09,306 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 610 [2022-11-25 18:15:09,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 114 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:09,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:09,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 610 [2022-11-25 18:15:09,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:09,805 INFO L130 PetriNetUnfolder]: 1303/3050 cut-off events. [2022-11-25 18:15:09,805 INFO L131 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-11-25 18:15:09,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5708 conditions, 3050 events. 1303/3050 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 21267 event pairs, 1176 based on Foata normal form. 44/2092 useless extension candidates. Maximal degree in co-relation 5702. Up to 2517 conditions per place. [2022-11-25 18:15:09,825 INFO L137 encePairwiseOnDemand]: 603/610 looper letters, 78 selfloop transitions, 2 changer transitions 0/109 dead transitions. [2022-11-25 18:15:09,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 109 transitions, 410 flow [2022-11-25 18:15:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:15:09,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:15:09,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 925 transitions. [2022-11-25 18:15:09,828 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.505464480874317 [2022-11-25 18:15:09,828 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 925 transitions. [2022-11-25 18:15:09,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 925 transitions. [2022-11-25 18:15:09,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:09,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 925 transitions. [2022-11-25 18:15:09,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 308.3333333333333) internal successors, (925), 3 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:09,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:09,837 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:09,837 INFO L175 Difference]: Start difference. First operand has 119 places, 114 transitions, 260 flow. Second operand 3 states and 925 transitions. [2022-11-25 18:15:09,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 109 transitions, 410 flow [2022-11-25 18:15:09,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 109 transitions, 396 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-25 18:15:09,843 INFO L231 Difference]: Finished difference. Result has 112 places, 108 transitions, 238 flow [2022-11-25 18:15:09,843 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=112, PETRI_TRANSITIONS=108} [2022-11-25 18:15:09,847 INFO L288 CegarLoopForPetriNet]: 126 programPoint places, -14 predicate places. [2022-11-25 18:15:09,847 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 108 transitions, 238 flow [2022-11-25 18:15:09,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:09,848 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:09,848 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:15:09,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:15:09,848 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-25 18:15:09,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:09,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1122872979, now seen corresponding path program 1 times [2022-11-25 18:15:09,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:09,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980507736] [2022-11-25 18:15:09,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:09,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:09,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:09,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980507736] [2022-11-25 18:15:09,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980507736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:09,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:09,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:15:09,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916014768] [2022-11-25 18:15:09,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:09,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:15:09,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:09,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:15:09,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:15:10,161 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 610 [2022-11-25 18:15:10,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 108 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 276.6666666666667) internal successors, (830), 3 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:10,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:10,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 610 [2022-11-25 18:15:10,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:10,635 INFO L130 PetriNetUnfolder]: 1197/2813 cut-off events. [2022-11-25 18:15:10,635 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-11-25 18:15:10,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5205 conditions, 2813 events. 1197/2813 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 19268 event pairs, 1006 based on Foata normal form. 0/2022 useless extension candidates. Maximal degree in co-relation 5200. Up to 2236 conditions per place. [2022-11-25 18:15:10,650 INFO L137 encePairwiseOnDemand]: 595/610 looper letters, 99 selfloop transitions, 10 changer transitions 0/135 dead transitions. [2022-11-25 18:15:10,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 135 transitions, 510 flow [2022-11-25 18:15:10,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:15:10,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:15:10,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 939 transitions. [2022-11-25 18:15:10,654 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5131147540983606 [2022-11-25 18:15:10,654 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 939 transitions. [2022-11-25 18:15:10,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 939 transitions. [2022-11-25 18:15:10,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:10,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 939 transitions. [2022-11-25 18:15:10,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 313.0) internal successors, (939), 3 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:10,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:10,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:10,669 INFO L175 Difference]: Start difference. First operand has 112 places, 108 transitions, 238 flow. Second operand 3 states and 939 transitions. [2022-11-25 18:15:10,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 135 transitions, 510 flow [2022-11-25 18:15:10,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 135 transitions, 508 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:15:10,675 INFO L231 Difference]: Finished difference. Result has 115 places, 115 transitions, 316 flow [2022-11-25 18:15:10,676 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=316, PETRI_PLACES=115, PETRI_TRANSITIONS=115} [2022-11-25 18:15:10,681 INFO L288 CegarLoopForPetriNet]: 126 programPoint places, -11 predicate places. [2022-11-25 18:15:10,681 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 115 transitions, 316 flow [2022-11-25 18:15:10,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.6666666666667) internal successors, (830), 3 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:10,683 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:10,683 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 18:15:10,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 18:15:10,683 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-25 18:15:10,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:10,684 INFO L85 PathProgramCache]: Analyzing trace with hash 449395887, now seen corresponding path program 1 times [2022-11-25 18:15:10,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:10,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461479547] [2022-11-25 18:15:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:10,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:15:10,733 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:15:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:15:10,780 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:15:10,780 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:15:10,781 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (82 of 83 remaining) [2022-11-25 18:15:10,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 83 remaining) [2022-11-25 18:15:10,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 83 remaining) [2022-11-25 18:15:10,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 83 remaining) [2022-11-25 18:15:10,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 83 remaining) [2022-11-25 18:15:10,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 83 remaining) [2022-11-25 18:15:10,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 83 remaining) [2022-11-25 18:15:10,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 83 remaining) [2022-11-25 18:15:10,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 83 remaining) [2022-11-25 18:15:10,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 83 remaining) [2022-11-25 18:15:10,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 83 remaining) [2022-11-25 18:15:10,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 83 remaining) [2022-11-25 18:15:10,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 83 remaining) [2022-11-25 18:15:10,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 83 remaining) [2022-11-25 18:15:10,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 83 remaining) [2022-11-25 18:15:10,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 83 remaining) [2022-11-25 18:15:10,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 83 remaining) [2022-11-25 18:15:10,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 83 remaining) [2022-11-25 18:15:10,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 83 remaining) [2022-11-25 18:15:10,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 83 remaining) [2022-11-25 18:15:10,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 83 remaining) [2022-11-25 18:15:10,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 83 remaining) [2022-11-25 18:15:10,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 83 remaining) [2022-11-25 18:15:10,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 83 remaining) [2022-11-25 18:15:10,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 83 remaining) [2022-11-25 18:15:10,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 83 remaining) [2022-11-25 18:15:10,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 83 remaining) [2022-11-25 18:15:10,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 83 remaining) [2022-11-25 18:15:10,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 83 remaining) [2022-11-25 18:15:10,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK (53 of 83 remaining) [2022-11-25 18:15:10,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 83 remaining) [2022-11-25 18:15:10,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 83 remaining) [2022-11-25 18:15:10,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 83 remaining) [2022-11-25 18:15:10,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 83 remaining) [2022-11-25 18:15:10,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 83 remaining) [2022-11-25 18:15:10,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 83 remaining) [2022-11-25 18:15:10,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 83 remaining) [2022-11-25 18:15:10,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 83 remaining) [2022-11-25 18:15:10,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 83 remaining) [2022-11-25 18:15:10,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 83 remaining) [2022-11-25 18:15:10,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK (42 of 83 remaining) [2022-11-25 18:15:10,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 83 remaining) [2022-11-25 18:15:10,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 83 remaining) [2022-11-25 18:15:10,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 83 remaining) [2022-11-25 18:15:10,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 83 remaining) [2022-11-25 18:15:10,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 83 remaining) [2022-11-25 18:15:10,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 83 remaining) [2022-11-25 18:15:10,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 83 remaining) [2022-11-25 18:15:10,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 83 remaining) [2022-11-25 18:15:10,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 83 remaining) [2022-11-25 18:15:10,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 83 remaining) [2022-11-25 18:15:10,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 83 remaining) [2022-11-25 18:15:10,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 83 remaining) [2022-11-25 18:15:10,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 83 remaining) [2022-11-25 18:15:10,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 83 remaining) [2022-11-25 18:15:10,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 83 remaining) [2022-11-25 18:15:10,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 83 remaining) [2022-11-25 18:15:10,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 83 remaining) [2022-11-25 18:15:10,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 83 remaining) [2022-11-25 18:15:10,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 83 remaining) [2022-11-25 18:15:10,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 83 remaining) [2022-11-25 18:15:10,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr20ASSERT_VIOLATIONMEMORY_LEAK (21 of 83 remaining) [2022-11-25 18:15:10,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 83 remaining) [2022-11-25 18:15:10,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 83 remaining) [2022-11-25 18:15:10,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 83 remaining) [2022-11-25 18:15:10,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 83 remaining) [2022-11-25 18:15:10,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 83 remaining) [2022-11-25 18:15:10,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 83 remaining) [2022-11-25 18:15:10,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 83 remaining) [2022-11-25 18:15:10,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 83 remaining) [2022-11-25 18:15:10,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 83 remaining) [2022-11-25 18:15:10,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 83 remaining) [2022-11-25 18:15:10,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 83 remaining) [2022-11-25 18:15:10,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 83 remaining) [2022-11-25 18:15:10,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 83 remaining) [2022-11-25 18:15:10,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 83 remaining) [2022-11-25 18:15:10,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 83 remaining) [2022-11-25 18:15:10,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 83 remaining) [2022-11-25 18:15:10,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 83 remaining) [2022-11-25 18:15:10,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 83 remaining) [2022-11-25 18:15:10,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 83 remaining) [2022-11-25 18:15:10,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 83 remaining) [2022-11-25 18:15:10,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr20ASSERT_VIOLATIONMEMORY_LEAK (0 of 83 remaining) [2022-11-25 18:15:10,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 18:15:10,811 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:10,813 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:15:10,813 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 18:15:10,887 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:15:10,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 383 places, 420 transitions, 858 flow [2022-11-25 18:15:11,038 INFO L130 PetriNetUnfolder]: 76/732 cut-off events. [2022-11-25 18:15:11,038 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 18:15:11,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 746 conditions, 732 events. 76/732 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3494 event pairs, 0 based on Foata normal form. 0/503 useless extension candidates. Maximal degree in co-relation 459. Up to 12 conditions per place. [2022-11-25 18:15:11,046 INFO L82 GeneralOperation]: Start removeDead. Operand has 383 places, 420 transitions, 858 flow [2022-11-25 18:15:11,056 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 383 places, 420 transitions, 858 flow [2022-11-25 18:15:11,056 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:15:11,056 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 383 places, 420 transitions, 858 flow [2022-11-25 18:15:11,056 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 383 places, 420 transitions, 858 flow [2022-11-25 18:15:11,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 383 places, 420 transitions, 858 flow [2022-11-25 18:15:11,179 INFO L130 PetriNetUnfolder]: 76/732 cut-off events. [2022-11-25 18:15:11,179 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 18:15:11,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 746 conditions, 732 events. 76/732 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3494 event pairs, 0 based on Foata normal form. 0/503 useless extension candidates. Maximal degree in co-relation 459. Up to 12 conditions per place. [2022-11-25 18:15:11,226 INFO L119 LiptonReduction]: Number of co-enabled transitions 83028 [2022-11-25 18:17:55,356 INFO L134 LiptonReduction]: Checked pairs total: 284659 [2022-11-25 18:17:55,357 INFO L136 LiptonReduction]: Total number of compositions: 364 [2022-11-25 18:17:55,358 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:17:55,359 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;@54367d26, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:17:55,359 INFO L358 AbstractCegarLoop]: Starting to check reachability of 104 error locations. [2022-11-25 18:17:55,360 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 18:17:55,360 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:17:55,360 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:17:55,360 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 18:17:55,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2022-11-25 18:17:55,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:17:55,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2063, now seen corresponding path program 1 times [2022-11-25 18:17:55,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:17:55,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021165979] [2022-11-25 18:17:55,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:17:55,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:17:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:17:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:17:55,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:17:55,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021165979] [2022-11-25 18:17:55,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021165979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:17:55,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:17:55,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 18:17:55,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741959980] [2022-11-25 18:17:55,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:17:55,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:17:55,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:17:55,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:17:55,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:17:55,371 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 784 [2022-11-25 18:17:55,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 212 transitions, 442 flow. Second operand has 2 states, 2 states have (on average 377.5) internal successors, (755), 2 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:55,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:17:55,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 784 [2022-11-25 18:17:55,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:18:11,775 INFO L130 PetriNetUnfolder]: 101823/174607 cut-off events. [2022-11-25 18:18:11,775 INFO L131 PetriNetUnfolder]: For 208/208 co-relation queries the response was YES. [2022-11-25 18:18:11,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325117 conditions, 174607 events. 101823/174607 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 4365. Compared 1728288 event pairs, 96639 based on Foata normal form. 17302/123150 useless extension candidates. Maximal degree in co-relation 267136. Up to 150333 conditions per place. [2022-11-25 18:18:12,885 INFO L137 encePairwiseOnDemand]: 739/784 looper letters, 116 selfloop transitions, 0 changer transitions 0/167 dead transitions. [2022-11-25 18:18:12,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 167 transitions, 584 flow [2022-11-25 18:18:12,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:18:12,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:18:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 915 transitions. [2022-11-25 18:18:12,893 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5835459183673469 [2022-11-25 18:18:12,893 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 915 transitions. [2022-11-25 18:18:12,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 915 transitions. [2022-11-25 18:18:12,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:18:12,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 915 transitions. [2022-11-25 18:18:12,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 457.5) internal successors, (915), 2 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:18:12,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 784.0) internal successors, (2352), 3 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:18:12,903 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 784.0) internal successors, (2352), 3 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:18:12,904 INFO L175 Difference]: Start difference. First operand has 178 places, 212 transitions, 442 flow. Second operand 2 states and 915 transitions. [2022-11-25 18:18:12,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 167 transitions, 584 flow [2022-11-25 18:18:12,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 167 transitions, 584 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:18:12,909 INFO L231 Difference]: Finished difference. Result has 167 places, 167 transitions, 352 flow [2022-11-25 18:18:12,910 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=352, PETRI_PLACES=167, PETRI_TRANSITIONS=167} [2022-11-25 18:18:12,912 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, -11 predicate places. [2022-11-25 18:18:12,912 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 167 transitions, 352 flow [2022-11-25 18:18:12,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 377.5) internal successors, (755), 2 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:18:12,913 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:18:12,913 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:18:12,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 18:18:12,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2022-11-25 18:18:12,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:18:12,914 INFO L85 PathProgramCache]: Analyzing trace with hash 66004, now seen corresponding path program 1 times [2022-11-25 18:18:12,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:18:12,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947490868] [2022-11-25 18:18:12,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:18:12,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:18:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:18:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:18:13,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:18:13,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947490868] [2022-11-25 18:18:13,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947490868] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:18:13,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:18:13,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:18:13,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449940243] [2022-11-25 18:18:13,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:18:13,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:18:13,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:18:13,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:18:13,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:18:13,313 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 368 out of 784 [2022-11-25 18:18:13,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 167 transitions, 352 flow. Second operand has 3 states, 3 states have (on average 368.6666666666667) internal successors, (1106), 3 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:18:13,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:18:13,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 368 of 784 [2022-11-25 18:18:13,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand