./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/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_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/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_9497dbcf-9807-4510-84a5-e7b8fbadd342/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 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:14:45,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:14:45,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:14:45,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:14:45,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:14:45,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:14:45,172 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:14:45,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:14:45,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:14:45,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:14:45,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:14:45,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:14:45,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:14:45,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:14:45,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:14:45,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:14:45,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:14:45,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:14:45,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:14:45,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:14:45,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:14:45,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:14:45,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:14:45,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:14:45,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:14:45,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:14:45,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:14:45,213 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:14:45,213 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:14:45,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:14:45,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:14:45,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:14:45,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:14:45,218 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:14:45,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:14:45,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:14:45,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:14:45,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:14:45,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:14:45,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:14:45,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:14:45,224 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:14:45,250 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:14:45,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:14:45,251 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:14:45,251 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:14:45,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:14:45,252 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:14:45,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:14:45,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:14:45,254 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:14:45,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:14:45,254 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:14:45,254 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:14:45,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:14:45,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:14:45,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:14:45,255 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:14:45,255 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:14:45,256 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:14:45,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:14:45,256 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:14:45,256 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:14:45,256 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:14:45,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:14:45,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:14:45,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:14:45,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:14:45,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:14:45,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:14:45,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:14:45,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:14:45,258 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:14:45,259 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:14:45,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:14:45,259 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_9497dbcf-9807-4510-84a5-e7b8fbadd342/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa [2022-11-25 18:14:45,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:14:45,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:14:45,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:14:45,536 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:14:45,537 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:14:45,538 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2022-11-25 18:14:48,746 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:14:49,042 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:14:49,043 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2022-11-25 18:14:49,072 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/data/c717849de/32c250beab4044ffbe8cd482b065e33a/FLAGe5410ef45 [2022-11-25 18:14:49,086 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/data/c717849de/32c250beab4044ffbe8cd482b065e33a [2022-11-25 18:14:49,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:14:49,091 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:14:49,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:14:49,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:14:49,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:14:49,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:14:49" (1/1) ... [2022-11-25 18:14:49,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6957d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:49, skipping insertion in model container [2022-11-25 18:14:49,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:14:49" (1/1) ... [2022-11-25 18:14:49,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:14:49,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:14:49,745 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2022-11-25 18:14:49,816 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:14:49,933 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:14:49,991 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2022-11-25 18:14:50,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:14:50,070 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:14:50,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:50 WrapperNode [2022-11-25 18:14:50,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:14:50,072 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:14:50,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:14:50,073 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:14:50,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:50" (1/1) ... [2022-11-25 18:14:50,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:50" (1/1) ... [2022-11-25 18:14:50,142 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 224 [2022-11-25 18:14:50,142 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:14:50,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:14:50,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:14:50,144 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:14:50,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:50" (1/1) ... [2022-11-25 18:14:50,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:50" (1/1) ... [2022-11-25 18:14:50,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:50" (1/1) ... [2022-11-25 18:14:50,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:50" (1/1) ... [2022-11-25 18:14:50,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:50" (1/1) ... [2022-11-25 18:14:50,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:50" (1/1) ... [2022-11-25 18:14:50,179 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:50" (1/1) ... [2022-11-25 18:14:50,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:50" (1/1) ... [2022-11-25 18:14:50,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:14:50,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:14:50,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:14:50,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:14:50,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:50" (1/1) ... [2022-11-25 18:14:50,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:14:50,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:14:50,230 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:14:50,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:14:50,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:14:50,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 18:14:50,275 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-11-25 18:14:50,275 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-11-25 18:14:50,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:14:50,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:14:50,276 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-11-25 18:14:50,276 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-11-25 18:14:50,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:14:50,278 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 18:14:50,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:14:50,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:14:50,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 18:14:50,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:14:50,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:14:50,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:14:50,281 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:14:50,504 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:14:50,523 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:14:51,215 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:14:51,226 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:14:51,235 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-25 18:14:51,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:14:51 BoogieIcfgContainer [2022-11-25 18:14:51,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:14:51,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:14:51,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:14:51,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:14:51,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:14:49" (1/3) ... [2022-11-25 18:14:51,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d59eeca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:14:51, skipping insertion in model container [2022-11-25 18:14:51,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:50" (2/3) ... [2022-11-25 18:14:51,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d59eeca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:14:51, skipping insertion in model container [2022-11-25 18:14:51,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:14:51" (3/3) ... [2022-11-25 18:14:51,253 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree.i [2022-11-25 18:14:51,275 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:14:51,276 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2022-11-25 18:14:51,276 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:14:51,499 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-25 18:14:51,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 284 transitions, 590 flow [2022-11-25 18:14:51,788 INFO L130 PetriNetUnfolder]: 54/531 cut-off events. [2022-11-25 18:14:51,789 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-11-25 18:14:51,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 551 conditions, 531 events. 54/531 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2430 event pairs, 0 based on Foata normal form. 0/385 useless extension candidates. Maximal degree in co-relation 269. Up to 8 conditions per place. [2022-11-25 18:14:51,805 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 284 transitions, 590 flow [2022-11-25 18:14:51,821 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 284 transitions, 590 flow [2022-11-25 18:14:51,826 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:14:51,856 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 264 places, 284 transitions, 590 flow [2022-11-25 18:14:51,858 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 264 places, 284 transitions, 590 flow [2022-11-25 18:14:51,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 284 transitions, 590 flow [2022-11-25 18:14:51,985 INFO L130 PetriNetUnfolder]: 54/531 cut-off events. [2022-11-25 18:14:51,985 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-11-25 18:14:51,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 551 conditions, 531 events. 54/531 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2430 event pairs, 0 based on Foata normal form. 0/385 useless extension candidates. Maximal degree in co-relation 269. Up to 8 conditions per place. [2022-11-25 18:14:52,009 INFO L119 LiptonReduction]: Number of co-enabled transitions 26454 [2022-11-25 18:15:17,756 INFO L134 LiptonReduction]: Checked pairs total: 63162 [2022-11-25 18:15:17,756 INFO L136 LiptonReduction]: Total number of compositions: 257 [2022-11-25 18:15:17,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:15:17,780 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;@2b3788d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:15:17,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2022-11-25 18:15:17,784 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2022-11-25 18:15:17,784 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:15:17,784 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:17,785 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:15:17,786 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 18:15:17,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:17,791 INFO L85 PathProgramCache]: Analyzing trace with hash 35730, now seen corresponding path program 1 times [2022-11-25 18:15:17,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:17,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074385071] [2022-11-25 18:15:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:17,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:17,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:17,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074385071] [2022-11-25 18:15:17,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074385071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:17,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:17,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:15:17,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132507098] [2022-11-25 18:15:17,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:17,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:15:17,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:18,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:15:18,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:15:18,033 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 541 [2022-11-25 18:15:18,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 114 transitions, 250 flow. Second operand has 2 states, 2 states have (on average 261.0) internal successors, (522), 2 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:18,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:18,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 541 [2022-11-25 18:15:18,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:21,977 INFO L130 PetriNetUnfolder]: 18093/31193 cut-off events. [2022-11-25 18:15:21,978 INFO L131 PetriNetUnfolder]: For 187/187 co-relation queries the response was YES. [2022-11-25 18:15:22,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59012 conditions, 31193 events. 18093/31193 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 950. Compared 247659 event pairs, 17344 based on Foata normal form. 978/16580 useless extension candidates. Maximal degree in co-relation 56260. Up to 27656 conditions per place. [2022-11-25 18:15:22,174 INFO L137 encePairwiseOnDemand]: 526/541 looper letters, 80 selfloop transitions, 0 changer transitions 0/99 dead transitions. [2022-11-25 18:15:22,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 99 transitions, 380 flow [2022-11-25 18:15:22,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:15:22,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:15:22,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 615 transitions. [2022-11-25 18:15:22,268 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5683918669131238 [2022-11-25 18:15:22,269 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 615 transitions. [2022-11-25 18:15:22,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 615 transitions. [2022-11-25 18:15:22,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:22,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 615 transitions. [2022-11-25 18:15:22,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 307.5) internal successors, (615), 2 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:22,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 541.0) internal successors, (1623), 3 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:22,292 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 541.0) internal successors, (1623), 3 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:22,294 INFO L175 Difference]: Start difference. First operand has 101 places, 114 transitions, 250 flow. Second operand 2 states and 615 transitions. [2022-11-25 18:15:22,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 99 transitions, 380 flow [2022-11-25 18:15:22,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 99 transitions, 380 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:15:22,306 INFO L231 Difference]: Finished difference. Result has 98 places, 99 transitions, 220 flow [2022-11-25 18:15:22,308 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=220, PETRI_PLACES=98, PETRI_TRANSITIONS=99} [2022-11-25 18:15:22,312 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -3 predicate places. [2022-11-25 18:15:22,312 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 99 transitions, 220 flow [2022-11-25 18:15:22,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 261.0) internal successors, (522), 2 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:22,313 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:22,313 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:15:22,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:15:22,314 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 18:15:22,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:22,325 INFO L85 PathProgramCache]: Analyzing trace with hash 35739, now seen corresponding path program 1 times [2022-11-25 18:15:22,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:22,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263523776] [2022-11-25 18:15:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:22,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:22,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:22,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263523776] [2022-11-25 18:15:22,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263523776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:22,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:22,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:15:22,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792323586] [2022-11-25 18:15:22,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:22,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:15:22,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:22,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:15:22,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:15:22,772 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 541 [2022-11-25 18:15:22,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 99 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 255.66666666666666) internal successors, (767), 3 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:22,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:22,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 541 [2022-11-25 18:15:22,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:25,859 INFO L130 PetriNetUnfolder]: 16794/28325 cut-off events. [2022-11-25 18:15:25,860 INFO L131 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2022-11-25 18:15:25,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54317 conditions, 28325 events. 16794/28325 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 221277 event pairs, 11485 based on Foata normal form. 0/14502 useless extension candidates. Maximal degree in co-relation 54312. Up to 18176 conditions per place. [2022-11-25 18:15:26,042 INFO L137 encePairwiseOnDemand]: 536/541 looper letters, 120 selfloop transitions, 2 changer transitions 0/141 dead transitions. [2022-11-25 18:15:26,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 141 transitions, 548 flow [2022-11-25 18:15:26,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:15:26,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:15:26,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 890 transitions. [2022-11-25 18:15:26,046 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5483672211953173 [2022-11-25 18:15:26,046 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 890 transitions. [2022-11-25 18:15:26,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 890 transitions. [2022-11-25 18:15:26,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:26,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 890 transitions. [2022-11-25 18:15:26,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.6666666666667) internal successors, (890), 3 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:26,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:26,057 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:26,057 INFO L175 Difference]: Start difference. First operand has 98 places, 99 transitions, 220 flow. Second operand 3 states and 890 transitions. [2022-11-25 18:15:26,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 141 transitions, 548 flow [2022-11-25 18:15:26,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 141 transitions, 548 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:15:26,068 INFO L231 Difference]: Finished difference. Result has 100 places, 98 transitions, 228 flow [2022-11-25 18:15:26,069 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=100, PETRI_TRANSITIONS=98} [2022-11-25 18:15:26,070 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -1 predicate places. [2022-11-25 18:15:26,070 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 98 transitions, 228 flow [2022-11-25 18:15:26,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.66666666666666) internal successors, (767), 3 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:26,071 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:26,072 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:15:26,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:15:26,072 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 18:15:26,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:26,076 INFO L85 PathProgramCache]: Analyzing trace with hash 35740, now seen corresponding path program 1 times [2022-11-25 18:15:26,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:26,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632215686] [2022-11-25 18:15:26,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:26,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:26,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:26,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:26,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632215686] [2022-11-25 18:15:26,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632215686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:26,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:26,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:15:26,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943684702] [2022-11-25 18:15:26,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:26,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:15:26,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:26,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:15:26,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:15:26,530 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 541 [2022-11-25 18:15:26,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 98 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:26,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:26,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 541 [2022-11-25 18:15:26,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:29,272 INFO L130 PetriNetUnfolder]: 16884/29195 cut-off events. [2022-11-25 18:15:29,272 INFO L131 PetriNetUnfolder]: For 874/874 co-relation queries the response was YES. [2022-11-25 18:15:29,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56417 conditions, 29195 events. 16884/29195 cut-off events. For 874/874 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 230801 event pairs, 16165 based on Foata normal form. 0/15718 useless extension candidates. Maximal degree in co-relation 56410. Up to 25840 conditions per place. [2022-11-25 18:15:29,454 INFO L137 encePairwiseOnDemand]: 537/541 looper letters, 78 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2022-11-25 18:15:29,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 99 transitions, 390 flow [2022-11-25 18:15:29,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:15:29,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:15:29,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 835 transitions. [2022-11-25 18:15:29,459 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.514479359211337 [2022-11-25 18:15:29,459 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 835 transitions. [2022-11-25 18:15:29,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 835 transitions. [2022-11-25 18:15:29,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:29,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 835 transitions. [2022-11-25 18:15:29,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:29,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:29,469 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:29,469 INFO L175 Difference]: Start difference. First operand has 100 places, 98 transitions, 228 flow. Second operand 3 states and 835 transitions. [2022-11-25 18:15:29,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 99 transitions, 390 flow [2022-11-25 18:15:29,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 99 transitions, 386 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:15:29,485 INFO L231 Difference]: Finished difference. Result has 101 places, 99 transitions, 238 flow [2022-11-25 18:15:29,486 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=101, PETRI_TRANSITIONS=99} [2022-11-25 18:15:29,487 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, 0 predicate places. [2022-11-25 18:15:29,488 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 99 transitions, 238 flow [2022-11-25 18:15:29,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:29,489 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:29,489 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:15:29,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:15:29,489 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 18:15:29,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:29,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1109053, now seen corresponding path program 1 times [2022-11-25 18:15:29,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:29,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500860646] [2022-11-25 18:15:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:29,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:29,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:29,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500860646] [2022-11-25 18:15:29,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500860646] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:15:29,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934126472] [2022-11-25 18:15:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:29,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:29,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:29,957 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:29,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:15:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:30,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 18:15:30,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:30,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:15:30,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:15:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:30,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:30,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:15:30,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2022-11-25 18:15:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:32,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934126472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:15:32,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:15:32,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-25 18:15:32,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458447028] [2022-11-25 18:15:32,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:15:32,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:15:32,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:32,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:15:32,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:15:35,186 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 541 [2022-11-25 18:15:35,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 99 transitions, 238 flow. Second operand has 8 states, 8 states have (on average 248.125) internal successors, (1985), 8 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:35,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:35,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 541 [2022-11-25 18:15:35,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:42,489 INFO L130 PetriNetUnfolder]: 41440/70633 cut-off events. [2022-11-25 18:15:42,490 INFO L131 PetriNetUnfolder]: For 730/730 co-relation queries the response was YES. [2022-11-25 18:15:42,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135990 conditions, 70633 events. 41440/70633 cut-off events. For 730/730 co-relation queries the response was YES. Maximal size of possible extension queue 2098. Compared 626395 event pairs, 34069 based on Foata normal form. 0/35255 useless extension candidates. Maximal degree in co-relation 135982. Up to 26826 conditions per place. [2022-11-25 18:15:42,934 INFO L137 encePairwiseOnDemand]: 536/541 looper letters, 216 selfloop transitions, 7 changer transitions 0/242 dead transitions. [2022-11-25 18:15:42,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 242 transitions, 1018 flow [2022-11-25 18:15:42,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:15:42,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:15:42,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1709 transitions. [2022-11-25 18:15:42,940 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.526494146642021 [2022-11-25 18:15:42,941 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1709 transitions. [2022-11-25 18:15:42,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1709 transitions. [2022-11-25 18:15:42,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:42,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1709 transitions. [2022-11-25 18:15:42,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 284.8333333333333) internal successors, (1709), 6 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:42,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:42,957 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:42,957 INFO L175 Difference]: Start difference. First operand has 101 places, 99 transitions, 238 flow. Second operand 6 states and 1709 transitions. [2022-11-25 18:15:42,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 242 transitions, 1018 flow [2022-11-25 18:15:42,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 242 transitions, 1014 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 18:15:42,969 INFO L231 Difference]: Finished difference. Result has 108 places, 104 transitions, 286 flow [2022-11-25 18:15:42,970 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=108, PETRI_TRANSITIONS=104} [2022-11-25 18:15:42,973 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, 7 predicate places. [2022-11-25 18:15:42,973 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 104 transitions, 286 flow [2022-11-25 18:15:42,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 248.125) internal successors, (1985), 8 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:42,975 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:42,975 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2022-11-25 18:15:42,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:15:43,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:43,189 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 18:15:43,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:43,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1065833709, now seen corresponding path program 1 times [2022-11-25 18:15:43,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:43,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799592194] [2022-11-25 18:15:43,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:43,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:15:43,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:43,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799592194] [2022-11-25 18:15:43,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799592194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:43,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:43,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:15:43,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148160156] [2022-11-25 18:15:43,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:43,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:15:43,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:43,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:15:43,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:15:43,432 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 541 [2022-11-25 18:15:43,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 104 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 252.33333333333334) internal successors, (757), 3 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:43,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:43,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 541 [2022-11-25 18:15:43,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:49,058 INFO L130 PetriNetUnfolder]: 38611/65764 cut-off events. [2022-11-25 18:15:49,058 INFO L131 PetriNetUnfolder]: For 2148/2148 co-relation queries the response was YES. [2022-11-25 18:15:49,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129294 conditions, 65764 events. 38611/65764 cut-off events. For 2148/2148 co-relation queries the response was YES. Maximal size of possible extension queue 1953. Compared 577959 event pairs, 31342 based on Foata normal form. 0/34864 useless extension candidates. Maximal degree in co-relation 129283. Up to 50211 conditions per place. [2022-11-25 18:15:49,405 INFO L137 encePairwiseOnDemand]: 537/541 looper letters, 122 selfloop transitions, 4 changer transitions 0/145 dead transitions. [2022-11-25 18:15:49,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 145 transitions, 620 flow [2022-11-25 18:15:49,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:15:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:15:49,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 875 transitions. [2022-11-25 18:15:49,414 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5391250770178682 [2022-11-25 18:15:49,415 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 875 transitions. [2022-11-25 18:15:49,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 875 transitions. [2022-11-25 18:15:49,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:49,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 875 transitions. [2022-11-25 18:15:49,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.6666666666667) internal successors, (875), 3 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:49,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:49,430 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:49,430 INFO L175 Difference]: Start difference. First operand has 108 places, 104 transitions, 286 flow. Second operand 3 states and 875 transitions. [2022-11-25 18:15:49,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 145 transitions, 620 flow [2022-11-25 18:15:49,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 145 transitions, 614 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 18:15:49,439 INFO L231 Difference]: Finished difference. Result has 107 places, 102 transitions, 284 flow [2022-11-25 18:15:49,440 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=107, PETRI_TRANSITIONS=102} [2022-11-25 18:15:49,444 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, 6 predicate places. [2022-11-25 18:15:49,444 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 102 transitions, 284 flow [2022-11-25 18:15:49,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 252.33333333333334) internal successors, (757), 3 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:49,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:49,445 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2022-11-25 18:15:49,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:15:49,446 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 18:15:49,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:49,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1065833710, now seen corresponding path program 1 times [2022-11-25 18:15:49,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:49,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292948621] [2022-11-25 18:15:49,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:49,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:49,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:49,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292948621] [2022-11-25 18:15:49,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292948621] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:15:49,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137961940] [2022-11-25 18:15:49,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:49,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:49,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:49,565 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:49,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:15:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:49,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:15:49,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:49,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:49,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137961940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:15:49,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:15:49,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-25 18:15:49,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039614862] [2022-11-25 18:15:49,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:15:49,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 18:15:49,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:49,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 18:15:49,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:15:49,833 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 541 [2022-11-25 18:15:49,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 102 transitions, 284 flow. Second operand has 9 states, 9 states have (on average 256.22222222222223) internal successors, (2306), 9 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:49,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:49,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 541 [2022-11-25 18:15:49,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:52,773 INFO L130 PetriNetUnfolder]: 15942/27579 cut-off events. [2022-11-25 18:15:52,773 INFO L131 PetriNetUnfolder]: For 1856/1856 co-relation queries the response was YES. [2022-11-25 18:15:52,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53899 conditions, 27579 events. 15942/27579 cut-off events. For 1856/1856 co-relation queries the response was YES. Maximal size of possible extension queue 850. Compared 216058 event pairs, 15256 based on Foata normal form. 4/15116 useless extension candidates. Maximal degree in co-relation 53887. Up to 24403 conditions per place. [2022-11-25 18:15:52,897 INFO L137 encePairwiseOnDemand]: 537/541 looper letters, 77 selfloop transitions, 8 changer transitions 0/104 dead transitions. [2022-11-25 18:15:52,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 104 transitions, 470 flow [2022-11-25 18:15:52,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:15:52,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:15:52,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2129 transitions. [2022-11-25 18:15:52,903 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49191312384473196 [2022-11-25 18:15:52,904 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2129 transitions. [2022-11-25 18:15:52,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2129 transitions. [2022-11-25 18:15:52,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:52,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2129 transitions. [2022-11-25 18:15:52,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 266.125) internal successors, (2129), 8 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:52,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 541.0) internal successors, (4869), 9 states have internal predecessors, (4869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:52,921 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 541.0) internal successors, (4869), 9 states have internal predecessors, (4869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:52,922 INFO L175 Difference]: Start difference. First operand has 107 places, 102 transitions, 284 flow. Second operand 8 states and 2129 transitions. [2022-11-25 18:15:52,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 104 transitions, 470 flow [2022-11-25 18:15:52,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 104 transitions, 456 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-25 18:15:52,933 INFO L231 Difference]: Finished difference. Result has 117 places, 103 transitions, 316 flow [2022-11-25 18:15:52,933 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=316, PETRI_PLACES=117, PETRI_TRANSITIONS=103} [2022-11-25 18:15:52,934 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, 16 predicate places. [2022-11-25 18:15:52,934 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 103 transitions, 316 flow [2022-11-25 18:15:52,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 256.22222222222223) internal successors, (2306), 9 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:52,935 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:52,935 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 18:15:52,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:15:53,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:53,141 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 18:15:53,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:53,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1318835236, now seen corresponding path program 2 times [2022-11-25 18:15:53,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:53,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344112577] [2022-11-25 18:15:53,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:53,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:54,168 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 18:15:54,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:54,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344112577] [2022-11-25 18:15:54,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344112577] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:15:54,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101590128] [2022-11-25 18:15:54,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:15:54,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:54,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:54,174 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:54,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:15:54,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:15:54,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:15:54,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-25 18:15:54,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:54,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:15:54,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:15:54,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:15:54,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:15:54,518 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 18:15:54,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 18:15:54,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:15:54,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:15:54,582 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 18:15:54,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 18:15:54,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:15:54,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:15:54,665 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 18:15:54,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 18:15:54,692 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 18:15:54,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:58,813 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:15:58,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2022-11-25 18:15:58,984 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:15:58,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 70 [2022-11-25 18:15:59,329 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:15:59,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 76 [2022-11-25 18:16:01,701 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:16:01,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 82 [2022-11-25 18:16:08,082 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:16:08,083 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 18:16:08,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101590128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:16:08,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:16:08,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-11-25 18:16:08,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986002427] [2022-11-25 18:16:08,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:16:08,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 18:16:08,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:08,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 18:16:08,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-11-25 18:16:15,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:16:22,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:16:25,699 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 541 [2022-11-25 18:16:25,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 103 transitions, 316 flow. Second operand has 17 states, 17 states have (on average 242.05882352941177) internal successors, (4115), 17 states have internal predecessors, (4115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:25,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:25,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 541 [2022-11-25 18:16:25,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:28,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:16:30,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:16:32,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:16:34,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:16:36,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:16:47,757 INFO L130 PetriNetUnfolder]: 49992/85103 cut-off events. [2022-11-25 18:16:47,758 INFO L131 PetriNetUnfolder]: For 1002/1002 co-relation queries the response was YES. [2022-11-25 18:16:47,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164165 conditions, 85103 events. 49992/85103 cut-off events. For 1002/1002 co-relation queries the response was YES. Maximal size of possible extension queue 2486. Compared 774061 event pairs, 31255 based on Foata normal form. 6/43148 useless extension candidates. Maximal degree in co-relation 164149. Up to 25883 conditions per place. [2022-11-25 18:16:48,197 INFO L137 encePairwiseOnDemand]: 535/541 looper letters, 305 selfloop transitions, 17 changer transitions 0/341 dead transitions. [2022-11-25 18:16:48,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 341 transitions, 1555 flow [2022-11-25 18:16:48,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 18:16:48,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 18:16:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3461 transitions. [2022-11-25 18:16:48,206 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4921086307407934 [2022-11-25 18:16:48,207 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3461 transitions. [2022-11-25 18:16:48,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3461 transitions. [2022-11-25 18:16:48,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:48,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3461 transitions. [2022-11-25 18:16:48,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 266.2307692307692) internal successors, (3461), 13 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:48,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 541.0) internal successors, (7574), 14 states have internal predecessors, (7574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:48,230 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 541.0) internal successors, (7574), 14 states have internal predecessors, (7574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:48,230 INFO L175 Difference]: Start difference. First operand has 117 places, 103 transitions, 316 flow. Second operand 13 states and 3461 transitions. [2022-11-25 18:16:48,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 341 transitions, 1555 flow [2022-11-25 18:16:48,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 341 transitions, 1514 flow, removed 12 selfloop flow, removed 8 redundant places. [2022-11-25 18:16:48,240 INFO L231 Difference]: Finished difference. Result has 125 places, 112 transitions, 389 flow [2022-11-25 18:16:48,241 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=389, PETRI_PLACES=125, PETRI_TRANSITIONS=112} [2022-11-25 18:16:48,241 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, 24 predicate places. [2022-11-25 18:16:48,242 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 112 transitions, 389 flow [2022-11-25 18:16:48,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 242.05882352941177) internal successors, (4115), 17 states have internal predecessors, (4115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:48,244 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:48,244 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1] [2022-11-25 18:16:48,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:16:48,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 18:16:48,450 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 18:16:48,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:48,451 INFO L85 PathProgramCache]: Analyzing trace with hash 941411502, now seen corresponding path program 2 times [2022-11-25 18:16:48,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:48,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366100090] [2022-11-25 18:16:48,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:48,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:48,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:48,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366100090] [2022-11-25 18:16:48,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366100090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:48,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498703484] [2022-11-25 18:16:48,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:16:48,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:48,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:48,719 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:48,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:16:48,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:16:48,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:16:48,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:16:48,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:48,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:16:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 18:16:48,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:16:48,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498703484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:48,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:16:48,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2022-11-25 18:16:48,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608725864] [2022-11-25 18:16:48,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:48,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:16:48,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:48,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:16:48,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:16:49,101 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 541 [2022-11-25 18:16:49,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 112 transitions, 389 flow. Second operand has 3 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:49,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:49,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 541 [2022-11-25 18:16:49,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:57,102 INFO L130 PetriNetUnfolder]: 49494/84252 cut-off events. [2022-11-25 18:16:57,103 INFO L131 PetriNetUnfolder]: For 2969/2969 co-relation queries the response was YES. [2022-11-25 18:16:57,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165233 conditions, 84252 events. 49494/84252 cut-off events. For 2969/2969 co-relation queries the response was YES. Maximal size of possible extension queue 2482. Compared 758323 event pairs, 44415 based on Foata normal form. 4/44791 useless extension candidates. Maximal degree in co-relation 165215. Up to 74944 conditions per place. [2022-11-25 18:16:57,633 INFO L137 encePairwiseOnDemand]: 536/541 looper letters, 92 selfloop transitions, 4 changer transitions 0/115 dead transitions. [2022-11-25 18:16:57,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 115 transitions, 587 flow [2022-11-25 18:16:57,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:16:57,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:16:57,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 841 transitions. [2022-11-25 18:16:57,636 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5181762168823167 [2022-11-25 18:16:57,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 841 transitions. [2022-11-25 18:16:57,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 841 transitions. [2022-11-25 18:16:57,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:57,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 841 transitions. [2022-11-25 18:16:57,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:57,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:57,644 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:57,644 INFO L175 Difference]: Start difference. First operand has 125 places, 112 transitions, 389 flow. Second operand 3 states and 841 transitions. [2022-11-25 18:16:57,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 115 transitions, 587 flow [2022-11-25 18:16:57,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 115 transitions, 550 flow, removed 12 selfloop flow, removed 6 redundant places. [2022-11-25 18:16:57,653 INFO L231 Difference]: Finished difference. Result has 122 places, 114 transitions, 380 flow [2022-11-25 18:16:57,654 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=380, PETRI_PLACES=122, PETRI_TRANSITIONS=114} [2022-11-25 18:16:57,655 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, 21 predicate places. [2022-11-25 18:16:57,655 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 114 transitions, 380 flow [2022-11-25 18:16:57,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:57,656 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:57,656 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-11-25 18:16:57,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-25 18:16:57,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9497dbcf-9807-4510-84a5-e7b8fbadd342/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 18:16:57,862 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 18:16:57,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:57,862 INFO L85 PathProgramCache]: Analyzing trace with hash -490495940, now seen corresponding path program 3 times [2022-11-25 18:16:57,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:57,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630973714] [2022-11-25 18:16:57,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:57,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat