./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.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_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/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_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/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_a7e476df-5e0c-432a-9ec8-5573e17bd575/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 c488feb98493d291286969cd9fdbd15fc14c729caece3fe94bd3c70430190936 --- 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 16:41:13,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:41:13,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:41:13,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:41:13,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:41:13,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:41:13,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:41:13,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:41:13,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:41:13,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:41:13,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:41:13,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:41:13,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:41:13,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:41:13,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:41:13,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:41:13,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:41:13,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:41:13,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:41:13,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:41:13,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:41:13,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:41:13,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:41:13,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:41:13,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:41:13,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:41:13,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:41:13,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:41:13,247 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:41:13,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:41:13,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:41:13,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:41:13,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:41:13,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:41:13,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:41:13,254 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:41:13,255 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:41:13,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:41:13,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:41:13,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:41:13,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:41:13,265 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 16:41:13,317 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:41:13,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:41:13,319 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:41:13,319 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:41:13,320 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:41:13,320 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:41:13,321 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:41:13,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:41:13,322 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:41:13,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:41:13,324 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:41:13,324 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 16:41:13,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:41:13,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:41:13,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:41:13,325 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 16:41:13,325 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 16:41:13,325 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 16:41:13,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:41:13,326 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 16:41:13,326 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:41:13,326 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:41:13,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:41:13,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:41:13,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:41:13,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:41:13,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:41:13,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:41:13,329 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:41:13,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:41:13,330 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:41:13,330 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:41:13,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:41:13,331 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_a7e476df-5e0c-432a-9ec8-5573e17bd575/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c488feb98493d291286969cd9fdbd15fc14c729caece3fe94bd3c70430190936 [2022-11-25 16:41:13,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:41:13,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:41:13,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:41:13,762 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:41:13,762 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:41:13,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i [2022-11-25 16:41:17,529 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:41:17,995 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:41:17,996 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i [2022-11-25 16:41:18,023 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/data/939df26c0/d83743d7ba7f433da2f6abd521745bdd/FLAGb78d4f433 [2022-11-25 16:41:18,043 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/data/939df26c0/d83743d7ba7f433da2f6abd521745bdd [2022-11-25 16:41:18,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:41:18,048 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:41:18,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:41:18,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:41:18,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:41:18,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:41:18" (1/1) ... [2022-11-25 16:41:18,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54ed21ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:18, skipping insertion in model container [2022-11-25 16:41:18,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:41:18" (1/1) ... [2022-11-25 16:41:18,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:41:18,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:41:19,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:41:19,039 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:41:19,138 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:41:19,268 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:41:19,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:19 WrapperNode [2022-11-25 16:41:19,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:41:19,276 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:41:19,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:41:19,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:41:19,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:19" (1/1) ... [2022-11-25 16:41:19,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:19" (1/1) ... [2022-11-25 16:41:19,347 INFO L138 Inliner]: procedures = 370, calls = 30, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 116 [2022-11-25 16:41:19,348 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:41:19,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:41:19,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:41:19,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:41:19,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:19" (1/1) ... [2022-11-25 16:41:19,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:19" (1/1) ... [2022-11-25 16:41:19,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:19" (1/1) ... [2022-11-25 16:41:19,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:19" (1/1) ... [2022-11-25 16:41:19,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:19" (1/1) ... [2022-11-25 16:41:19,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:19" (1/1) ... [2022-11-25 16:41:19,387 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:19" (1/1) ... [2022-11-25 16:41:19,389 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:19" (1/1) ... [2022-11-25 16:41:19,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:41:19,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:41:19,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:41:19,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:41:19,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:19" (1/1) ... [2022-11-25 16:41:19,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:41:19,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:19,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:41:19,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:41:19,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 16:41:19,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 16:41:19,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 16:41:19,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 16:41:19,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 16:41:19,500 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 16:41:19,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 16:41:19,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:41:19,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 16:41:19,502 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-25 16:41:19,508 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-25 16:41:19,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:41:19,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:41:19,510 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 16:41:19,784 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:41:19,787 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:41:20,518 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:41:20,529 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:41:20,530 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 16:41:20,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:41:20 BoogieIcfgContainer [2022-11-25 16:41:20,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:41:20,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:41:20,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:41:20,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:41:20,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:41:18" (1/3) ... [2022-11-25 16:41:20,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20323ef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:41:20, skipping insertion in model container [2022-11-25 16:41:20,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:19" (2/3) ... [2022-11-25 16:41:20,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20323ef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:41:20, skipping insertion in model container [2022-11-25 16:41:20,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:41:20" (3/3) ... [2022-11-25 16:41:20,544 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_11-arraylist_nr.i [2022-11-25 16:41:20,569 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:41:20,569 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2022-11-25 16:41:20,570 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 16:41:20,711 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 16:41:20,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 187 transitions, 379 flow [2022-11-25 16:41:20,951 INFO L130 PetriNetUnfolder]: 4/186 cut-off events. [2022-11-25 16:41:20,951 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:41:20,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 186 events. 4/186 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 196 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2022-11-25 16:41:20,959 INFO L82 GeneralOperation]: Start removeDead. Operand has 187 places, 187 transitions, 379 flow [2022-11-25 16:41:20,977 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 186 transitions, 375 flow [2022-11-25 16:41:20,983 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:41:21,007 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 186 transitions, 375 flow [2022-11-25 16:41:21,011 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 186 transitions, 375 flow [2022-11-25 16:41:21,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 186 transitions, 375 flow [2022-11-25 16:41:21,059 INFO L130 PetriNetUnfolder]: 4/186 cut-off events. [2022-11-25 16:41:21,059 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:41:21,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 186 events. 4/186 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 195 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2022-11-25 16:41:21,063 INFO L119 LiptonReduction]: Number of co-enabled transitions 3136 [2022-11-25 16:42:15,168 WARN L233 SmtUtils]: Spent 17.19s on a formula simplification. DAG size of input: 235 DAG size of output: 219 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 16:42:24,896 WARN L233 SmtUtils]: Spent 9.72s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 16:42:37,353 WARN L233 SmtUtils]: Spent 12.45s on a formula simplification. DAG size of input: 235 DAG size of output: 219 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 16:42:42,724 WARN L233 SmtUtils]: Spent 5.37s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 16:42:52,443 WARN L233 SmtUtils]: Spent 9.68s on a formula simplification. DAG size of input: 216 DAG size of output: 200 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 16:43:07,319 WARN L233 SmtUtils]: Spent 10.87s on a formula simplification. DAG size of input: 216 DAG size of output: 202 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 16:43:20,215 WARN L233 SmtUtils]: Spent 7.82s on a formula simplification. DAG size of input: 221 DAG size of output: 208 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 16:43:36,777 WARN L233 SmtUtils]: Spent 12.71s on a formula simplification. DAG size of input: 221 DAG size of output: 210 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 16:43:42,481 WARN L233 SmtUtils]: Spent 5.70s on a formula simplification that was a NOOP. DAG size: 202 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 16:44:02,213 WARN L233 SmtUtils]: Spent 17.67s on a formula simplification. DAG size of input: 240 DAG size of output: 237 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 16:44:10,531 WARN L233 SmtUtils]: Spent 8.31s on a formula simplification that was a NOOP. DAG size: 231 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 16:44:33,460 WARN L233 SmtUtils]: Spent 22.92s on a formula simplification. DAG size of input: 249 DAG size of output: 244 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 16:44:43,385 WARN L233 SmtUtils]: Spent 9.92s on a formula simplification that was a NOOP. DAG size: 237 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 16:44:43,502 INFO L134 LiptonReduction]: Checked pairs total: 10293 [2022-11-25 16:44:43,502 INFO L136 LiptonReduction]: Total number of compositions: 250 [2022-11-25 16:44:43,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:44:43,538 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;@1a0f3efa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:44:43,539 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2022-11-25 16:44:43,551 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 16:44:43,552 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:44:43,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:44:43,553 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 16:44:43,553 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-25 16:44:43,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:43,561 INFO L85 PathProgramCache]: Analyzing trace with hash 22196, now seen corresponding path program 1 times [2022-11-25 16:44:43,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:43,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855802106] [2022-11-25 16:44:43,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:43,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:43,714 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 16:44:43,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:43,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855802106] [2022-11-25 16:44:43,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855802106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:43,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:43,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:44:43,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991299972] [2022-11-25 16:44:43,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:43,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 16:44:43,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:43,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 16:44:43,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 16:44:43,754 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 437 [2022-11-25 16:44:43,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 123 flow. Second operand has 2 states, 2 states have (on average 184.0) internal successors, (368), 2 states have internal predecessors, (368), 0 states have call successors, (0), 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 16:44:43,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:44:43,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 437 [2022-11-25 16:44:43,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:44:44,089 INFO L130 PetriNetUnfolder]: 225/511 cut-off events. [2022-11-25 16:44:44,090 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:44:44,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1000 conditions, 511 events. 225/511 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2607 event pairs, 224 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 983. Up to 485 conditions per place. [2022-11-25 16:44:44,095 INFO L137 encePairwiseOnDemand]: 417/437 looper letters, 36 selfloop transitions, 0 changer transitions 0/40 dead transitions. [2022-11-25 16:44:44,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 40 transitions, 155 flow [2022-11-25 16:44:44,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 16:44:44,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 16:44:44,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 422 transitions. [2022-11-25 16:44:44,110 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.482837528604119 [2022-11-25 16:44:44,111 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 422 transitions. [2022-11-25 16:44:44,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 422 transitions. [2022-11-25 16:44:44,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:44:44,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 422 transitions. [2022-11-25 16:44:44,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 211.0) internal successors, (422), 2 states have internal predecessors, (422), 0 states have call successors, (0), 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 16:44:44,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 437.0) internal successors, (1311), 3 states have internal predecessors, (1311), 0 states have call successors, (0), 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 16:44:44,125 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 437.0) internal successors, (1311), 3 states have internal predecessors, (1311), 0 states have call successors, (0), 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 16:44:44,127 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 123 flow. Second operand 2 states and 422 transitions. [2022-11-25 16:44:44,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 40 transitions, 155 flow [2022-11-25 16:44:44,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 40 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:44:44,133 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 82 flow [2022-11-25 16:44:44,135 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=82, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2022-11-25 16:44:44,138 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -20 predicate places. [2022-11-25 16:44:44,139 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 82 flow [2022-11-25 16:44:44,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 184.0) internal successors, (368), 2 states have internal predecessors, (368), 0 states have call successors, (0), 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 16:44:44,139 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:44:44,139 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 16:44:44,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 16:44:44,140 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-25 16:44:44,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:44,141 INFO L85 PathProgramCache]: Analyzing trace with hash 22201, now seen corresponding path program 1 times [2022-11-25 16:44:44,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:44,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181545152] [2022-11-25 16:44:44,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:44,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:44,309 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 16:44:44,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:44,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181545152] [2022-11-25 16:44:44,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181545152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:44,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:44,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:44:44,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500178145] [2022-11-25 16:44:44,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:44,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:44:44,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:44,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:44:44,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:44:44,341 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 437 [2022-11-25 16:44:44,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 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 16:44:44,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:44:44,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 437 [2022-11-25 16:44:44,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:44:44,722 INFO L130 PetriNetUnfolder]: 225/512 cut-off events. [2022-11-25 16:44:44,723 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:44:44,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1002 conditions, 512 events. 225/512 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2610 event pairs, 224 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 999. Up to 485 conditions per place. [2022-11-25 16:44:44,729 INFO L137 encePairwiseOnDemand]: 432/437 looper letters, 35 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2022-11-25 16:44:44,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 158 flow [2022-11-25 16:44:44,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:44:44,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:44:44,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2022-11-25 16:44:44,737 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4401220442410374 [2022-11-25 16:44:44,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2022-11-25 16:44:44,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2022-11-25 16:44:44,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:44:44,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2022-11-25 16:44:44,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 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 16:44:44,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 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 16:44:44,748 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 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 16:44:44,748 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 82 flow. Second operand 3 states and 577 transitions. [2022-11-25 16:44:44,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 158 flow [2022-11-25 16:44:44,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 158 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 16:44:44,750 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 98 flow [2022-11-25 16:44:44,751 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2022-11-25 16:44:44,752 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -17 predicate places. [2022-11-25 16:44:44,752 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 98 flow [2022-11-25 16:44:44,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 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 16:44:44,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:44:44,753 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 16:44:44,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 16:44:44,753 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-25 16:44:44,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:44,757 INFO L85 PathProgramCache]: Analyzing trace with hash 686376, now seen corresponding path program 1 times [2022-11-25 16:44:44,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:44,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744500536] [2022-11-25 16:44:44,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:44,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:44,906 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 16:44:44,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:44,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744500536] [2022-11-25 16:44:44,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744500536] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:44:44,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338755238] [2022-11-25 16:44:44,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:44,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:44,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:44,911 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:44:44,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 16:44:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:45,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 16:44:45,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:44:45,068 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 16:44:45,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:44:45,086 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 16:44:45,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338755238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:44:45,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:44:45,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 16:44:45,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806730948] [2022-11-25 16:44:45,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:44:45,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 16:44:45,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:45,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 16:44:45,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:44:45,114 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 437 [2022-11-25 16:44:45,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 98 flow. Second operand has 7 states, 7 states have (on average 179.14285714285714) internal successors, (1254), 7 states have internal predecessors, (1254), 0 states have call successors, (0), 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 16:44:45,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:44:45,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 437 [2022-11-25 16:44:45,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:44:45,730 INFO L130 PetriNetUnfolder]: 225/515 cut-off events. [2022-11-25 16:44:45,731 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:44:45,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 515 events. 225/515 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2594 event pairs, 224 based on Foata normal form. 0/290 useless extension candidates. Maximal degree in co-relation 1015. Up to 485 conditions per place. [2022-11-25 16:44:45,735 INFO L137 encePairwiseOnDemand]: 432/437 looper letters, 35 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2022-11-25 16:44:45,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 44 transitions, 190 flow [2022-11-25 16:44:45,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:44:45,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 16:44:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1117 transitions. [2022-11-25 16:44:45,740 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4260106788710908 [2022-11-25 16:44:45,741 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1117 transitions. [2022-11-25 16:44:45,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1117 transitions. [2022-11-25 16:44:45,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:44:45,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1117 transitions. [2022-11-25 16:44:45,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 186.16666666666666) internal successors, (1117), 6 states have internal predecessors, (1117), 0 states have call successors, (0), 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 16:44:45,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 437.0) internal successors, (3059), 7 states have internal predecessors, (3059), 0 states have call successors, (0), 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 16:44:45,754 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 437.0) internal successors, (3059), 7 states have internal predecessors, (3059), 0 states have call successors, (0), 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 16:44:45,754 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 98 flow. Second operand 6 states and 1117 transitions. [2022-11-25 16:44:45,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 44 transitions, 190 flow [2022-11-25 16:44:45,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 44 transitions, 186 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 16:44:45,758 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 142 flow [2022-11-25 16:44:45,759 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2022-11-25 16:44:45,760 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -10 predicate places. [2022-11-25 16:44:45,761 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 142 flow [2022-11-25 16:44:45,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 179.14285714285714) internal successors, (1254), 7 states have internal predecessors, (1254), 0 states have call successors, (0), 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 16:44:45,762 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:44:45,762 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 16:44:45,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 16:44:45,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:45,970 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-25 16:44:45,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:45,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1028851079, now seen corresponding path program 2 times [2022-11-25 16:44:45,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:45,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766791589] [2022-11-25 16:44:45,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:45,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:44:46,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:46,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766791589] [2022-11-25 16:44:46,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766791589] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:44:46,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203517476] [2022-11-25 16:44:46,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:44:46,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:46,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:46,196 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:44:46,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 16:44:46,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 16:44:46,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:44:46,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 16:44:46,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:44:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 16:44:46,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:44:46,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203517476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:46,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:44:46,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-11-25 16:44:46,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120443819] [2022-11-25 16:44:46,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:46,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:44:46,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:46,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:44:46,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:44:46,542 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 437 [2022-11-25 16:44:46,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:46,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:44:46,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 437 [2022-11-25 16:44:46,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:44:46,910 INFO L130 PetriNetUnfolder]: 212/478 cut-off events. [2022-11-25 16:44:46,910 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 16:44:46,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 478 events. 212/478 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2328 event pairs, 147 based on Foata normal form. 10/289 useless extension candidates. Maximal degree in co-relation 963. Up to 322 conditions per place. [2022-11-25 16:44:46,914 INFO L137 encePairwiseOnDemand]: 432/437 looper letters, 53 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2022-11-25 16:44:46,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 58 transitions, 272 flow [2022-11-25 16:44:46,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:44:46,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:44:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 588 transitions. [2022-11-25 16:44:46,917 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.448512585812357 [2022-11-25 16:44:46,917 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 588 transitions. [2022-11-25 16:44:46,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 588 transitions. [2022-11-25 16:44:46,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:44:46,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 588 transitions. [2022-11-25 16:44:46,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 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 16:44:46,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 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 16:44:46,924 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 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 16:44:46,924 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 142 flow. Second operand 3 states and 588 transitions. [2022-11-25 16:44:46,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 58 transitions, 272 flow [2022-11-25 16:44:46,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 58 transitions, 258 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 16:44:46,928 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 124 flow [2022-11-25 16:44:46,929 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2022-11-25 16:44:46,931 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -10 predicate places. [2022-11-25 16:44:46,931 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 124 flow [2022-11-25 16:44:46,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:46,932 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:44:46,932 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 16:44:46,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 16:44:47,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:47,140 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-25 16:44:47,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:47,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1028851080, now seen corresponding path program 1 times [2022-11-25 16:44:47,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:47,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37513253] [2022-11-25 16:44:47,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:47,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:44:47,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:47,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37513253] [2022-11-25 16:44:47,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37513253] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:44:47,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206151877] [2022-11-25 16:44:47,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:47,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:47,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:47,313 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:44:47,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 16:44:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:47,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:44:47,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:44:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:44:47,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:44:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:44:47,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206151877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:44:47,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:44:47,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 16:44:47,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959042372] [2022-11-25 16:44:47,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:44:47,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 16:44:47,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:47,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 16:44:47,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 16:44:47,632 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 437 [2022-11-25 16:44:47,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 124 flow. Second operand has 13 states, 13 states have (on average 179.07692307692307) internal successors, (2328), 13 states have internal predecessors, (2328), 0 states have call successors, (0), 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 16:44:47,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:44:47,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 437 [2022-11-25 16:44:47,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:44:48,421 INFO L130 PetriNetUnfolder]: 209/478 cut-off events. [2022-11-25 16:44:48,421 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-11-25 16:44:48,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1013 conditions, 478 events. 209/478 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2315 event pairs, 208 based on Foata normal form. 6/286 useless extension candidates. Maximal degree in co-relation 1003. Up to 451 conditions per place. [2022-11-25 16:44:48,425 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 33 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2022-11-25 16:44:48,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 48 transitions, 248 flow [2022-11-25 16:44:48,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 16:44:48,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 16:44:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2192 transitions. [2022-11-25 16:44:48,433 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41800152555301295 [2022-11-25 16:44:48,433 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2192 transitions. [2022-11-25 16:44:48,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2192 transitions. [2022-11-25 16:44:48,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:44:48,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2192 transitions. [2022-11-25 16:44:48,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 182.66666666666666) internal successors, (2192), 12 states have internal predecessors, (2192), 0 states have call successors, (0), 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 16:44:48,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 437.0) internal successors, (5681), 13 states have internal predecessors, (5681), 0 states have call successors, (0), 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 16:44:48,454 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 437.0) internal successors, (5681), 13 states have internal predecessors, (5681), 0 states have call successors, (0), 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 16:44:48,454 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 124 flow. Second operand 12 states and 2192 transitions. [2022-11-25 16:44:48,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 48 transitions, 248 flow [2022-11-25 16:44:48,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 48 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 16:44:48,458 INFO L231 Difference]: Finished difference. Result has 68 places, 48 transitions, 216 flow [2022-11-25 16:44:48,459 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=216, PETRI_PLACES=68, PETRI_TRANSITIONS=48} [2022-11-25 16:44:48,460 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 5 predicate places. [2022-11-25 16:44:48,460 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 48 transitions, 216 flow [2022-11-25 16:44:48,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 179.07692307692307) internal successors, (2328), 13 states have internal predecessors, (2328), 0 states have call successors, (0), 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 16:44:48,462 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:44:48,462 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-11-25 16:44:48,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 16:44:48,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:48,670 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-25 16:44:48,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:48,670 INFO L85 PathProgramCache]: Analyzing trace with hash 560606232, now seen corresponding path program 2 times [2022-11-25 16:44:48,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:48,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053978767] [2022-11-25 16:44:48,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:48,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 16:44:49,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:49,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053978767] [2022-11-25 16:44:49,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053978767] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:49,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:49,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:44:49,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833592196] [2022-11-25 16:44:49,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:49,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:44:49,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:49,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:44:49,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:44:49,401 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 437 [2022-11-25 16:44:49,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 48 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:49,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:44:49,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 437 [2022-11-25 16:44:49,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:44:49,743 INFO L130 PetriNetUnfolder]: 212/483 cut-off events. [2022-11-25 16:44:49,743 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-11-25 16:44:49,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1035 conditions, 483 events. 212/483 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2341 event pairs, 147 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 1019. Up to 327 conditions per place. [2022-11-25 16:44:49,748 INFO L137 encePairwiseOnDemand]: 434/437 looper letters, 58 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2022-11-25 16:44:49,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 346 flow [2022-11-25 16:44:49,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:44:49,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:44:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 585 transitions. [2022-11-25 16:44:49,752 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4462242562929062 [2022-11-25 16:44:49,752 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 585 transitions. [2022-11-25 16:44:49,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 585 transitions. [2022-11-25 16:44:49,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:44:49,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 585 transitions. [2022-11-25 16:44:49,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 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 16:44:49,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 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 16:44:49,759 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 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 16:44:49,760 INFO L175 Difference]: Start difference. First operand has 68 places, 48 transitions, 216 flow. Second operand 3 states and 585 transitions. [2022-11-25 16:44:49,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 346 flow [2022-11-25 16:44:49,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 298 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-11-25 16:44:49,769 INFO L231 Difference]: Finished difference. Result has 64 places, 47 transitions, 150 flow [2022-11-25 16:44:49,769 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=64, PETRI_TRANSITIONS=47} [2022-11-25 16:44:49,772 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2022-11-25 16:44:49,772 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 47 transitions, 150 flow [2022-11-25 16:44:49,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:49,773 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:44:49,773 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2022-11-25 16:44:49,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 16:44:49,774 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-25 16:44:49,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:49,775 INFO L85 PathProgramCache]: Analyzing trace with hash -2106893450, now seen corresponding path program 1 times [2022-11-25 16:44:49,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:49,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269238235] [2022-11-25 16:44:49,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:49,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 16:44:51,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:51,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269238235] [2022-11-25 16:44:51,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269238235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:51,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:51,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:44:51,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478150141] [2022-11-25 16:44:51,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:51,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:44:51,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:51,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:44:51,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:44:51,686 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 437 [2022-11-25 16:44:51,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 47 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 163.5) internal successors, (654), 4 states have internal predecessors, (654), 0 states have call successors, (0), 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 16:44:51,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:44:51,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 437 [2022-11-25 16:44:51,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:44:52,075 INFO L130 PetriNetUnfolder]: 207/479 cut-off events. [2022-11-25 16:44:52,076 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2022-11-25 16:44:52,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 479 events. 207/479 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2421 event pairs, 38 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 1000. Up to 257 conditions per place. [2022-11-25 16:44:52,080 INFO L137 encePairwiseOnDemand]: 431/437 looper letters, 63 selfloop transitions, 6 changer transitions 0/72 dead transitions. [2022-11-25 16:44:52,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 72 transitions, 341 flow [2022-11-25 16:44:52,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:44:52,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 16:44:52,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 708 transitions. [2022-11-25 16:44:52,084 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40503432494279173 [2022-11-25 16:44:52,084 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 708 transitions. [2022-11-25 16:44:52,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 708 transitions. [2022-11-25 16:44:52,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:44:52,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 708 transitions. [2022-11-25 16:44:52,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 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 16:44:52,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 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 16:44:52,092 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 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 16:44:52,093 INFO L175 Difference]: Start difference. First operand has 64 places, 47 transitions, 150 flow. Second operand 4 states and 708 transitions. [2022-11-25 16:44:52,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 72 transitions, 341 flow [2022-11-25 16:44:52,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 72 transitions, 335 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 16:44:52,096 INFO L231 Difference]: Finished difference. Result has 66 places, 50 transitions, 175 flow [2022-11-25 16:44:52,097 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=66, PETRI_TRANSITIONS=50} [2022-11-25 16:44:52,097 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2022-11-25 16:44:52,098 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 50 transitions, 175 flow [2022-11-25 16:44:52,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.5) internal successors, (654), 4 states have internal predecessors, (654), 0 states have call successors, (0), 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 16:44:52,099 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:44:52,099 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2022-11-25 16:44:52,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 16:44:52,099 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-25 16:44:52,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:52,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2106893562, now seen corresponding path program 1 times [2022-11-25 16:44:52,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:52,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965625637] [2022-11-25 16:44:52,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:52,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 16:44:53,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:53,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965625637] [2022-11-25 16:44:53,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965625637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:53,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:53,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:44:53,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271502318] [2022-11-25 16:44:53,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:53,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:44:53,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:53,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:44:53,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:44:53,347 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 437 [2022-11-25 16:44:53,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 50 transitions, 175 flow. Second operand has 4 states, 4 states have (on average 166.5) internal successors, (666), 4 states have internal predecessors, (666), 0 states have call successors, (0), 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 16:44:53,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:44:53,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 437 [2022-11-25 16:44:53,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:44:53,697 INFO L130 PetriNetUnfolder]: 235/554 cut-off events. [2022-11-25 16:44:53,697 INFO L131 PetriNetUnfolder]: For 92/92 co-relation queries the response was YES. [2022-11-25 16:44:53,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1237 conditions, 554 events. 235/554 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2827 event pairs, 126 based on Foata normal form. 0/368 useless extension candidates. Maximal degree in co-relation 1220. Up to 273 conditions per place. [2022-11-25 16:44:53,701 INFO L137 encePairwiseOnDemand]: 432/437 looper letters, 73 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2022-11-25 16:44:53,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 81 transitions, 399 flow [2022-11-25 16:44:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:44:53,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:44:53,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 893 transitions. [2022-11-25 16:44:53,704 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40869565217391307 [2022-11-25 16:44:53,704 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 893 transitions. [2022-11-25 16:44:53,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 893 transitions. [2022-11-25 16:44:53,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:44:53,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 893 transitions. [2022-11-25 16:44:53,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 178.6) internal successors, (893), 5 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:53,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 437.0) internal successors, (2622), 6 states have internal predecessors, (2622), 0 states have call successors, (0), 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 16:44:53,711 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 437.0) internal successors, (2622), 6 states have internal predecessors, (2622), 0 states have call successors, (0), 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 16:44:53,712 INFO L175 Difference]: Start difference. First operand has 66 places, 50 transitions, 175 flow. Second operand 5 states and 893 transitions. [2022-11-25 16:44:53,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 81 transitions, 399 flow [2022-11-25 16:44:53,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 81 transitions, 396 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:44:53,715 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 187 flow [2022-11-25 16:44:53,715 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=187, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2022-11-25 16:44:53,715 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 6 predicate places. [2022-11-25 16:44:53,716 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 187 flow [2022-11-25 16:44:53,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.5) internal successors, (666), 4 states have internal predecessors, (666), 0 states have call successors, (0), 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 16:44:53,716 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:44:53,716 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:53,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 16:44:53,717 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-25 16:44:53,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:53,717 INFO L85 PathProgramCache]: Analyzing trace with hash -889147155, now seen corresponding path program 1 times [2022-11-25 16:44:53,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:53,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861968758] [2022-11-25 16:44:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:53,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 16:44:53,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:53,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861968758] [2022-11-25 16:44:53,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861968758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:53,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:53,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:44:53,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387504304] [2022-11-25 16:44:53,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:53,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:44:53,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:53,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:44:53,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:44:54,039 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 437 [2022-11-25 16:44:54,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 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 16:44:54,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:44:54,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 437 [2022-11-25 16:44:54,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:44:54,389 INFO L130 PetriNetUnfolder]: 215/519 cut-off events. [2022-11-25 16:44:54,389 INFO L131 PetriNetUnfolder]: For 187/187 co-relation queries the response was YES. [2022-11-25 16:44:54,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1146 conditions, 519 events. 215/519 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2786 event pairs, 70 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 1128. Up to 439 conditions per place. [2022-11-25 16:44:54,393 INFO L137 encePairwiseOnDemand]: 435/437 looper letters, 53 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2022-11-25 16:44:54,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 59 transitions, 316 flow [2022-11-25 16:44:54,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:44:54,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:44:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2022-11-25 16:44:54,395 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4401220442410374 [2022-11-25 16:44:54,396 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2022-11-25 16:44:54,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2022-11-25 16:44:54,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:44:54,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2022-11-25 16:44:54,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 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 16:44:54,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 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 16:44:54,401 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 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 16:44:54,401 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 187 flow. Second operand 3 states and 577 transitions. [2022-11-25 16:44:54,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 59 transitions, 316 flow [2022-11-25 16:44:54,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 59 transitions, 308 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 16:44:54,404 INFO L231 Difference]: Finished difference. Result has 67 places, 48 transitions, 175 flow [2022-11-25 16:44:54,405 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=67, PETRI_TRANSITIONS=48} [2022-11-25 16:44:54,406 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2022-11-25 16:44:54,406 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 48 transitions, 175 flow [2022-11-25 16:44:54,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 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 16:44:54,407 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:44:54,407 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:54,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 16:44:54,407 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-25 16:44:54,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:54,408 INFO L85 PathProgramCache]: Analyzing trace with hash -889147186, now seen corresponding path program 1 times [2022-11-25 16:44:54,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:54,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838381150] [2022-11-25 16:44:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:54,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 16:44:54,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:54,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838381150] [2022-11-25 16:44:54,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838381150] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:54,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:54,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:44:54,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406349016] [2022-11-25 16:44:54,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:54,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:44:54,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:54,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:44:54,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:44:54,656 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 437 [2022-11-25 16:44:54,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 48 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 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 16:44:54,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:44:54,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 437 [2022-11-25 16:44:54,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:44:55,032 INFO L130 PetriNetUnfolder]: 239/579 cut-off events. [2022-11-25 16:44:55,032 INFO L131 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2022-11-25 16:44:55,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1277 conditions, 579 events. 239/579 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3276 event pairs, 28 based on Foata normal form. 12/389 useless extension candidates. Maximal degree in co-relation 1259. Up to 413 conditions per place. [2022-11-25 16:44:55,037 INFO L137 encePairwiseOnDemand]: 427/437 looper letters, 58 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2022-11-25 16:44:55,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 364 flow [2022-11-25 16:44:55,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:44:55,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:44:55,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 585 transitions. [2022-11-25 16:44:55,039 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4462242562929062 [2022-11-25 16:44:55,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 585 transitions. [2022-11-25 16:44:55,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 585 transitions. [2022-11-25 16:44:55,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:44:55,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 585 transitions. [2022-11-25 16:44:55,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 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 16:44:55,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 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 16:44:55,045 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 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 16:44:55,045 INFO L175 Difference]: Start difference. First operand has 67 places, 48 transitions, 175 flow. Second operand 3 states and 585 transitions. [2022-11-25 16:44:55,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 364 flow [2022-11-25 16:44:55,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 71 transitions, 362 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:44:55,048 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 252 flow [2022-11-25 16:44:55,048 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=252, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2022-11-25 16:44:55,048 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2022-11-25 16:44:55,049 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 252 flow [2022-11-25 16:44:55,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 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 16:44:55,049 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:44:55,049 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:55,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 16:44:55,050 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-25 16:44:55,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:55,050 INFO L85 PathProgramCache]: Analyzing trace with hash -889190775, now seen corresponding path program 1 times [2022-11-25 16:44:55,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:55,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386151227] [2022-11-25 16:44:55,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:55,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 16:44:58,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:58,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386151227] [2022-11-25 16:44:58,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386151227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:58,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:58,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:44:58,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441491666] [2022-11-25 16:44:58,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:58,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:44:58,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:58,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:44:58,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:44:58,664 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 437 [2022-11-25 16:44:58,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 252 flow. Second operand has 5 states, 5 states have (on average 159.4) internal successors, (797), 5 states have internal predecessors, (797), 0 states have call successors, (0), 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 16:44:58,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:44:58,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 437 [2022-11-25 16:44:58,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:44:59,394 INFO L130 PetriNetUnfolder]: 279/641 cut-off events. [2022-11-25 16:44:59,395 INFO L131 PetriNetUnfolder]: For 300/301 co-relation queries the response was YES. [2022-11-25 16:44:59,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1619 conditions, 641 events. 279/641 cut-off events. For 300/301 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3475 event pairs, 90 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 1600. Up to 282 conditions per place. [2022-11-25 16:44:59,402 INFO L137 encePairwiseOnDemand]: 429/437 looper letters, 77 selfloop transitions, 14 changer transitions 0/93 dead transitions. [2022-11-25 16:44:59,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 93 transitions, 540 flow [2022-11-25 16:44:59,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 16:44:59,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 16:44:59,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1182 transitions. [2022-11-25 16:44:59,408 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38640078457012095 [2022-11-25 16:44:59,408 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1182 transitions. [2022-11-25 16:44:59,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1182 transitions. [2022-11-25 16:44:59,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:44:59,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1182 transitions. [2022-11-25 16:44:59,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 168.85714285714286) internal successors, (1182), 7 states have internal predecessors, (1182), 0 states have call successors, (0), 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 16:44:59,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 437.0) internal successors, (3496), 8 states have internal predecessors, (3496), 0 states have call successors, (0), 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 16:44:59,422 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 437.0) internal successors, (3496), 8 states have internal predecessors, (3496), 0 states have call successors, (0), 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 16:44:59,422 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 252 flow. Second operand 7 states and 1182 transitions. [2022-11-25 16:44:59,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 93 transitions, 540 flow [2022-11-25 16:44:59,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 93 transitions, 518 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 16:44:59,427 INFO L231 Difference]: Finished difference. Result has 77 places, 61 transitions, 299 flow [2022-11-25 16:44:59,428 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=299, PETRI_PLACES=77, PETRI_TRANSITIONS=61} [2022-11-25 16:44:59,429 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 14 predicate places. [2022-11-25 16:44:59,429 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 61 transitions, 299 flow [2022-11-25 16:44:59,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 159.4) internal successors, (797), 5 states have internal predecessors, (797), 0 states have call successors, (0), 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 16:44:59,430 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:44:59,430 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:59,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 16:44:59,431 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-25 16:44:59,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:59,431 INFO L85 PathProgramCache]: Analyzing trace with hash -889190426, now seen corresponding path program 1 times [2022-11-25 16:44:59,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:59,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532786698] [2022-11-25 16:44:59,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:59,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:45:01,907 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 16:45:01,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:45:01,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532786698] [2022-11-25 16:45:01,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532786698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:45:01,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:45:01,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:45:01,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466291203] [2022-11-25 16:45:01,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:45:01,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:45:01,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:45:01,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:45:01,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:45:02,278 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 437 [2022-11-25 16:45:02,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 61 transitions, 299 flow. Second operand has 5 states, 5 states have (on average 161.4) internal successors, (807), 5 states have internal predecessors, (807), 0 states have call successors, (0), 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 16:45:02,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:45:02,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 437 [2022-11-25 16:45:02,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:45:02,878 INFO L130 PetriNetUnfolder]: 265/618 cut-off events. [2022-11-25 16:45:02,879 INFO L131 PetriNetUnfolder]: For 335/336 co-relation queries the response was YES. [2022-11-25 16:45:02,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 618 events. 265/618 cut-off events. For 335/336 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3322 event pairs, 130 based on Foata normal form. 0/403 useless extension candidates. Maximal degree in co-relation 1639. Up to 312 conditions per place. [2022-11-25 16:45:02,884 INFO L137 encePairwiseOnDemand]: 430/437 looper letters, 66 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2022-11-25 16:45:02,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 494 flow [2022-11-25 16:45:02,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:45:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:45:02,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 857 transitions. [2022-11-25 16:45:02,889 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3922196796338673 [2022-11-25 16:45:02,889 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 857 transitions. [2022-11-25 16:45:02,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 857 transitions. [2022-11-25 16:45:02,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:45:02,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 857 transitions. [2022-11-25 16:45:02,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.4) internal successors, (857), 5 states have internal predecessors, (857), 0 states have call successors, (0), 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 16:45:02,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 437.0) internal successors, (2622), 6 states have internal predecessors, (2622), 0 states have call successors, (0), 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 16:45:02,898 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 437.0) internal successors, (2622), 6 states have internal predecessors, (2622), 0 states have call successors, (0), 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 16:45:02,899 INFO L175 Difference]: Start difference. First operand has 77 places, 61 transitions, 299 flow. Second operand 5 states and 857 transitions. [2022-11-25 16:45:02,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 494 flow [2022-11-25 16:45:02,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 78 transitions, 476 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-25 16:45:02,904 INFO L231 Difference]: Finished difference. Result has 78 places, 60 transitions, 293 flow [2022-11-25 16:45:02,905 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=293, PETRI_PLACES=78, PETRI_TRANSITIONS=60} [2022-11-25 16:45:02,908 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 15 predicate places. [2022-11-25 16:45:02,908 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 60 transitions, 293 flow [2022-11-25 16:45:02,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 161.4) internal successors, (807), 5 states have internal predecessors, (807), 0 states have call successors, (0), 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 16:45:02,929 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:45:02,929 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:45:02,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 16:45:02,929 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-25 16:45:02,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:45:02,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1793757438, now seen corresponding path program 1 times [2022-11-25 16:45:02,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:45:02,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158311259] [2022-11-25 16:45:02,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:45:02,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:45:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:45:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 16:45:03,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:45:03,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158311259] [2022-11-25 16:45:03,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158311259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:45:03,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:45:03,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:45:03,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828046345] [2022-11-25 16:45:03,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:45:03,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 16:45:03,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:45:03,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 16:45:03,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:45:04,594 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 437 [2022-11-25 16:45:04,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 60 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 168.33333333333334) internal successors, (1010), 6 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:45:04,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:45:04,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 437 [2022-11-25 16:45:04,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:45:05,142 INFO L130 PetriNetUnfolder]: 251/589 cut-off events. [2022-11-25 16:45:05,142 INFO L131 PetriNetUnfolder]: For 332/333 co-relation queries the response was YES. [2022-11-25 16:45:05,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1577 conditions, 589 events. 251/589 cut-off events. For 332/333 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3164 event pairs, 87 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 1555. Up to 243 conditions per place. [2022-11-25 16:45:05,148 INFO L137 encePairwiseOnDemand]: 429/437 looper letters, 85 selfloop transitions, 13 changer transitions 0/101 dead transitions. [2022-11-25 16:45:05,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 101 transitions, 615 flow [2022-11-25 16:45:05,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:45:05,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 16:45:05,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1081 transitions. [2022-11-25 16:45:05,152 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41228070175438597 [2022-11-25 16:45:05,153 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1081 transitions. [2022-11-25 16:45:05,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1081 transitions. [2022-11-25 16:45:05,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:45:05,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1081 transitions. [2022-11-25 16:45:05,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 180.16666666666666) internal successors, (1081), 6 states have internal predecessors, (1081), 0 states have call successors, (0), 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 16:45:05,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 437.0) internal successors, (3059), 7 states have internal predecessors, (3059), 0 states have call successors, (0), 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 16:45:05,162 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 437.0) internal successors, (3059), 7 states have internal predecessors, (3059), 0 states have call successors, (0), 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 16:45:05,162 INFO L175 Difference]: Start difference. First operand has 78 places, 60 transitions, 293 flow. Second operand 6 states and 1081 transitions. [2022-11-25 16:45:05,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 101 transitions, 615 flow [2022-11-25 16:45:05,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 101 transitions, 591 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 16:45:05,167 INFO L231 Difference]: Finished difference. Result has 82 places, 65 transitions, 360 flow [2022-11-25 16:45:05,168 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=360, PETRI_PLACES=82, PETRI_TRANSITIONS=65} [2022-11-25 16:45:05,169 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 19 predicate places. [2022-11-25 16:45:05,169 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 65 transitions, 360 flow [2022-11-25 16:45:05,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 168.33333333333334) internal successors, (1010), 6 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:45:05,170 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:45:05,170 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:45:05,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 16:45:05,170 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-25 16:45:05,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:45:05,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1793757411, now seen corresponding path program 1 times [2022-11-25 16:45:05,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:45:05,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910589908] [2022-11-25 16:45:05,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:45:05,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:45:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:45:05,235 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 16:45:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:45:05,326 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 16:45:05,326 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 16:45:05,328 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 52 remaining) [2022-11-25 16:45:05,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 52 remaining) [2022-11-25 16:45:05,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 52 remaining) [2022-11-25 16:45:05,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 52 remaining) [2022-11-25 16:45:05,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 52 remaining) [2022-11-25 16:45:05,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 52 remaining) [2022-11-25 16:45:05,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 52 remaining) [2022-11-25 16:45:05,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 52 remaining) [2022-11-25 16:45:05,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 52 remaining) [2022-11-25 16:45:05,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 52 remaining) [2022-11-25 16:45:05,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 52 remaining) [2022-11-25 16:45:05,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 52 remaining) [2022-11-25 16:45:05,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 52 remaining) [2022-11-25 16:45:05,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 52 remaining) [2022-11-25 16:45:05,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 52 remaining) [2022-11-25 16:45:05,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 52 remaining) [2022-11-25 16:45:05,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 52 remaining) [2022-11-25 16:45:05,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 52 remaining) [2022-11-25 16:45:05,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 52 remaining) [2022-11-25 16:45:05,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 52 remaining) [2022-11-25 16:45:05,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 52 remaining) [2022-11-25 16:45:05,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 52 remaining) [2022-11-25 16:45:05,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 52 remaining) [2022-11-25 16:45:05,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 52 remaining) [2022-11-25 16:45:05,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 52 remaining) [2022-11-25 16:45:05,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 52 remaining) [2022-11-25 16:45:05,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 52 remaining) [2022-11-25 16:45:05,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK (24 of 52 remaining) [2022-11-25 16:45:05,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (23 of 52 remaining) [2022-11-25 16:45:05,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 52 remaining) [2022-11-25 16:45:05,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 52 remaining) [2022-11-25 16:45:05,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 52 remaining) [2022-11-25 16:45:05,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 52 remaining) [2022-11-25 16:45:05,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 52 remaining) [2022-11-25 16:45:05,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 52 remaining) [2022-11-25 16:45:05,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 52 remaining) [2022-11-25 16:45:05,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 52 remaining) [2022-11-25 16:45:05,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 52 remaining) [2022-11-25 16:45:05,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 52 remaining) [2022-11-25 16:45:05,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 52 remaining) [2022-11-25 16:45:05,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 52 remaining) [2022-11-25 16:45:05,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 52 remaining) [2022-11-25 16:45:05,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 52 remaining) [2022-11-25 16:45:05,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 52 remaining) [2022-11-25 16:45:05,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 52 remaining) [2022-11-25 16:45:05,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 52 remaining) [2022-11-25 16:45:05,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 52 remaining) [2022-11-25 16:45:05,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 52 remaining) [2022-11-25 16:45:05,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 52 remaining) [2022-11-25 16:45:05,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 52 remaining) [2022-11-25 16:45:05,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 52 remaining) [2022-11-25 16:45:05,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 52 remaining) [2022-11-25 16:45:05,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 16:45:05,339 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:45:05,347 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-25 16:45:05,347 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 16:45:05,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 04:45:05 BasicIcfg [2022-11-25 16:45:05,415 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 16:45:05,415 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 16:45:05,415 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 16:45:05,416 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 16:45:05,416 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:41:20" (3/4) ... [2022-11-25 16:45:05,420 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-25 16:45:05,492 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/witness.graphml [2022-11-25 16:45:05,492 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 16:45:05,493 INFO L158 Benchmark]: Toolchain (without parser) took 227445.41ms. Allocated memory was 188.7MB in the beginning and 398.5MB in the end (delta: 209.7MB). Free memory was 142.1MB in the beginning and 135.2MB in the end (delta: 7.0MB). Peak memory consumption was 217.2MB. Max. memory is 16.1GB. [2022-11-25 16:45:05,493 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 142.6MB. Free memory is still 84.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 16:45:05,494 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1225.34ms. Allocated memory is still 188.7MB. Free memory was 142.1MB in the beginning and 103.2MB in the end (delta: 38.9MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2022-11-25 16:45:05,494 INFO L158 Benchmark]: Boogie Procedure Inliner took 72.57ms. Allocated memory is still 188.7MB. Free memory was 103.2MB in the beginning and 100.2MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-25 16:45:05,494 INFO L158 Benchmark]: Boogie Preprocessor took 44.35ms. Allocated memory is still 188.7MB. Free memory was 100.2MB in the beginning and 98.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 16:45:05,495 INFO L158 Benchmark]: RCFGBuilder took 1139.07ms. Allocated memory is still 188.7MB. Free memory was 98.1MB in the beginning and 143.9MB in the end (delta: -45.8MB). Peak memory consumption was 19.9MB. Max. memory is 16.1GB. [2022-11-25 16:45:05,495 INFO L158 Benchmark]: TraceAbstraction took 224879.35ms. Allocated memory was 188.7MB in the beginning and 398.5MB in the end (delta: 209.7MB). Free memory was 142.8MB in the beginning and 140.4MB in the end (delta: 2.4MB). Peak memory consumption was 212.0MB. Max. memory is 16.1GB. [2022-11-25 16:45:05,495 INFO L158 Benchmark]: Witness Printer took 77.05ms. Allocated memory is still 398.5MB. Free memory was 140.4MB in the beginning and 135.2MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-25 16:45:05,498 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 142.6MB. Free memory is still 84.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1225.34ms. Allocated memory is still 188.7MB. Free memory was 142.1MB in the beginning and 103.2MB in the end (delta: 38.9MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 72.57ms. Allocated memory is still 188.7MB. Free memory was 103.2MB in the beginning and 100.2MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.35ms. Allocated memory is still 188.7MB. Free memory was 100.2MB in the beginning and 98.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1139.07ms. Allocated memory is still 188.7MB. Free memory was 98.1MB in the beginning and 143.9MB in the end (delta: -45.8MB). Peak memory consumption was 19.9MB. Max. memory is 16.1GB. * TraceAbstraction took 224879.35ms. Allocated memory was 188.7MB in the beginning and 398.5MB in the end (delta: 209.7MB). Free memory was 142.8MB in the beginning and 140.4MB in the end (delta: 2.4MB). Peak memory consumption was 212.0MB. Max. memory is 16.1GB. * Witness Printer took 77.05ms. Allocated memory is still 398.5MB. Free memory was 140.4MB in the beginning and 135.2MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 202.5s, 186 PlacesBefore, 63 PlacesAfterwards, 186 TransitionsBefore, 60 TransitionsAfterwards, 3136 CoEnabledTransitionPairs, 7 FixpointIterations, 161 TrivialSequentialCompositions, 78 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 3 ConcurrentYvCompositions, 3 ChoiceCompositions, 250 TotalNumberOfCompositions, 10293 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4781, independent: 4380, independent conditional: 0, independent unconditional: 4380, dependent: 401, dependent conditional: 0, dependent unconditional: 401, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2275, independent: 2174, independent conditional: 0, independent unconditional: 2174, dependent: 101, dependent conditional: 0, dependent unconditional: 101, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2275, independent: 2104, independent conditional: 0, independent unconditional: 2104, dependent: 171, dependent conditional: 0, dependent unconditional: 171, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 171, independent: 70, independent conditional: 0, independent unconditional: 70, dependent: 101, dependent conditional: 0, dependent unconditional: 101, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 642, independent: 127, independent conditional: 0, independent unconditional: 127, dependent: 514, dependent conditional: 0, dependent unconditional: 514, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4781, independent: 2206, independent conditional: 0, independent unconditional: 2206, dependent: 300, dependent conditional: 0, dependent unconditional: 300, unknown: 2275, unknown conditional: 0, unknown unconditional: 2275] , Statistics on independence cache: Total cache size (in pairs): 347, Positive cache size: 296, Positive conditional cache size: 0, Positive unconditional cache size: 296, Negative cache size: 51, Negative conditional cache size: 0, Negative unconditional cache size: 51, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L1243] 0 pthread_mutex_t mutex[10]; [L1244] 0 struct s *slot[10]; [L1254] 0 int i = 0; VAL [i=0, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=1, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=2, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=3, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=4, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=5, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=6, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=7, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=8, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=9, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=10, mutex={1:0}, slot={2:0}] [L1254] COND FALSE 0 !(i < 10) [L1256] 0 int j = __VERIFIER_nondet_int(); [L1257] CALL 0 assume_abort_if_not(0 <= j && j < 10) [L11] COND FALSE 0 !(!cond) [L1257] RET 0 assume_abort_if_not(0 <= j && j < 10) [L1258] 0 struct s *p; [L1259] 0 pthread_t t1; [L1260] CALL, EXPR 0 new(1) [L1233] 0 struct s *p = malloc(sizeof(struct s)); [L1234] 0 p->datum = x [L1235] 0 p->next = ((void *)0) [L1236] 0 return p; [L1260] RET, EXPR 0 new(1) [L1260] 0 slot[j] = new(1) [L1261] CALL, EXPR 0 new(2) [L1233] 0 struct s *p = malloc(sizeof(struct s)); [L1234] 0 p->datum = x [L1235] 0 p->next = ((void *)0) [L1236] 0 return p; [L1261] RET, EXPR 0 new(2) [L1261] EXPR 0 slot[j] [L1261] CALL 0 list_add(new(2), slot[j]) [L1239] EXPR 0 list->next [L1239] 0 struct s *temp = list->next; [L1240] 0 list->next = node [L1241] 0 node->next = temp [L1261] RET 0 list_add(new(2), slot[j]) [L1262] FCALL, FORK 0 pthread_create(&t1, ((void *)0), t_fun, ((void *)0)) VAL [i=10, j=3, mutex={1:0}, pthread_create(&t1, ((void *)0), t_fun, ((void *)0))=-1, slot={2:0}, t1={9:0}] [L1246] 1 int i = __VERIFIER_nondet_int(); [L1247] CALL 1 assume_abort_if_not(0 <= i && i < 10) [L11] COND FALSE 1 !(!cond) [L1247] RET 1 assume_abort_if_not(0 <= i && i < 10) [L1249] CALL, EXPR 1 new(3) [L1233] 1 struct s *p = malloc(sizeof(struct s)); VAL [\old(x)=3, \old(x)=2, \result={6:0}, malloc(sizeof(struct s))={-2:0}, mutex={1:0}, p={6:0}, p={-2:0}, slot={2:0}, x=2, x=3] [L1234] 1 p->datum = x VAL [\old(x)=2, \old(x)=3, \result={6:0}, mutex={1:0}, p={6:0}, p={-2:0}, slot={2:0}, x=2, x=3] [L1235] 1 p->next = ((void *)0) [L1236] 1 return p; [L1249] RET, EXPR 1 new(3) [L1249] EXPR 1 slot[i] [L1249] CALL 1 list_add(new(3), slot[i]) [L1239] 1 list->next - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1253]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1262]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 241 locations, 52 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 224.6s, OverallIterations: 14, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 9.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 202.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2421 SdHoareTripleChecker+Valid, 7.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1393 mSDsluCounter, 219 SdHoareTripleChecker+Invalid, 6.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 146 mSDsCounter, 182 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3319 IncrementalHoareTripleChecker+Invalid, 3501 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 182 mSolverCounterUnsat, 73 mSDtfsCounter, 3319 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=360occurred in iteration=13, InterpolantAutomatonStates: 62, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 10.1s InterpolantComputationTime, 174 NumberOfCodeBlocks, 170 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 148 ConstructedInterpolants, 0 QuantifiedInterpolants, 1425 SizeOfPredicates, 0 NumberOfNonLiveVariables, 338 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 18 InterpolantComputations, 11 PerfectInterpolantSequences, 450/493 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-25 16:45:05,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e476df-5e0c-432a-9ec8-5573e17bd575/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)