./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/11_fmaxsymopt.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_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/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_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/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_29d3f7b7-8842-4f6c-be19-740800da108b/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 963498115a8eca6e92c68ab7fa8168826446f05b9b398350c3ee0745adf1bb45 --- 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 18:02:01,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:02:01,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:02:01,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:02:01,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:02:01,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:02:01,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:02:01,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:02:01,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:02:01,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:02:01,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:02:01,171 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:02:01,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:02:01,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:02:01,174 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:02:01,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:02:01,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:02:01,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:02:01,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:02:01,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:02:01,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:02:01,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:02:01,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:02:01,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:02:01,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:02:01,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:02:01,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:02:01,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:02:01,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:02:01,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:02:01,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:02:01,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:02:01,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:02:01,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:02:01,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:02:01,220 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:02:01,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:02:01,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:02:01,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:02:01,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:02:01,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:02:01,228 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:02:01,268 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:02:01,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:02:01,270 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:02:01,270 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:02:01,271 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:02:01,271 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:02:01,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:02:01,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:02:01,272 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:02:01,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:02:01,274 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:02:01,274 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:02:01,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:02:01,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:02:01,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:02:01,275 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:02:01,275 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:02:01,275 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:02:01,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:02:01,276 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:02:01,276 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:02:01,276 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:02:01,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:02:01,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:02:01,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:02:01,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:02:01,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:02:01,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:02:01,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:02:01,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:02:01,278 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:02:01,279 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:02:01,279 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:02:01,279 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_29d3f7b7-8842-4f6c-be19-740800da108b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 963498115a8eca6e92c68ab7fa8168826446f05b9b398350c3ee0745adf1bb45 [2022-11-25 18:02:01,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:02:01,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:02:01,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:02:01,602 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:02:01,603 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:02:01,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i [2022-11-25 18:02:04,656 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:02:04,906 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:02:04,907 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i [2022-11-25 18:02:04,921 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/data/4c7549db9/b9e9cf5cd51f4645a286f7f2a740e322/FLAGc72761201 [2022-11-25 18:02:04,945 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/data/4c7549db9/b9e9cf5cd51f4645a286f7f2a740e322 [2022-11-25 18:02:04,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:02:04,950 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:02:04,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:02:04,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:02:04,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:02:04,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:02:04" (1/1) ... [2022-11-25 18:02:04,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fdb6817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:04, skipping insertion in model container [2022-11-25 18:02:04,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:02:04" (1/1) ... [2022-11-25 18:02:04,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:02:05,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:02:05,455 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_29d3f7b7-8842-4f6c-be19-740800da108b/sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i[30540,30553] [2022-11-25 18:02:05,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:02:05,478 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:02:05,526 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_29d3f7b7-8842-4f6c-be19-740800da108b/sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i[30540,30553] [2022-11-25 18:02:05,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:02:05,572 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:02:05,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:05 WrapperNode [2022-11-25 18:02:05,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:02:05,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:02:05,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:02:05,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:02:05,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:05" (1/1) ... [2022-11-25 18:02:05,605 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:05" (1/1) ... [2022-11-25 18:02:05,626 INFO L138 Inliner]: procedures = 171, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 82 [2022-11-25 18:02:05,627 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:02:05,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:02:05,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:02:05,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:02:05,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:05" (1/1) ... [2022-11-25 18:02:05,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:05" (1/1) ... [2022-11-25 18:02:05,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:05" (1/1) ... [2022-11-25 18:02:05,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:05" (1/1) ... [2022-11-25 18:02:05,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:05" (1/1) ... [2022-11-25 18:02:05,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:05" (1/1) ... [2022-11-25 18:02:05,662 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:05" (1/1) ... [2022-11-25 18:02:05,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:05" (1/1) ... [2022-11-25 18:02:05,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:02:05,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:02:05,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:02:05,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:02:05,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:05" (1/1) ... [2022-11-25 18:02:05,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:02:05,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:05,696 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:02:05,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:02:05,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:02:05,734 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-25 18:02:05,734 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-25 18:02:05,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:02:05,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:02:05,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:02:05,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:02:05,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:02:05,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:02:05,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:02:05,737 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 18:02:05,853 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:02:05,854 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:02:06,051 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:02:06,094 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:02:06,094 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 18:02:06,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:02:06 BoogieIcfgContainer [2022-11-25 18:02:06,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:02:06,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:02:06,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:02:06,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:02:06,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:02:04" (1/3) ... [2022-11-25 18:02:06,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a21890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:02:06, skipping insertion in model container [2022-11-25 18:02:06,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:05" (2/3) ... [2022-11-25 18:02:06,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a21890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:02:06, skipping insertion in model container [2022-11-25 18:02:06,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:02:06" (3/3) ... [2022-11-25 18:02:06,106 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt.i [2022-11-25 18:02:06,126 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:02:06,126 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-25 18:02:06,127 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:02:06,224 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 18:02:06,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 93 transitions, 191 flow [2022-11-25 18:02:06,337 INFO L130 PetriNetUnfolder]: 9/109 cut-off events. [2022-11-25 18:02:06,338 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:02:06,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 109 events. 9/109 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 145 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 67. Up to 4 conditions per place. [2022-11-25 18:02:06,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 93 transitions, 191 flow [2022-11-25 18:02:06,349 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 93 transitions, 191 flow [2022-11-25 18:02:06,353 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:02:06,368 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 88 places, 93 transitions, 191 flow [2022-11-25 18:02:06,373 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 88 places, 93 transitions, 191 flow [2022-11-25 18:02:06,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 93 transitions, 191 flow [2022-11-25 18:02:06,428 INFO L130 PetriNetUnfolder]: 9/109 cut-off events. [2022-11-25 18:02:06,428 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:02:06,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 109 events. 9/109 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 145 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 67. Up to 4 conditions per place. [2022-11-25 18:02:06,440 INFO L119 LiptonReduction]: Number of co-enabled transitions 1862 [2022-11-25 18:02:10,453 INFO L134 LiptonReduction]: Checked pairs total: 1716 [2022-11-25 18:02:10,453 INFO L136 LiptonReduction]: Total number of compositions: 103 [2022-11-25 18:02:10,470 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:02:10,477 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;@36d025c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:02:10,477 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-11-25 18:02:10,479 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-11-25 18:02:10,480 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:02:10,480 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:10,481 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:02:10,482 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2022-11-25 18:02:10,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:10,490 INFO L85 PathProgramCache]: Analyzing trace with hash 14580, now seen corresponding path program 1 times [2022-11-25 18:02:10,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:10,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420868009] [2022-11-25 18:02:10,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:10,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:10,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:10,829 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 18:02:10,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:10,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420868009] [2022-11-25 18:02:10,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420868009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:10,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:10,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:02:10,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337790270] [2022-11-25 18:02:10,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:10,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:02:10,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:10,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:02:10,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:02:10,924 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 196 [2022-11-25 18:02:10,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 35 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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 18:02:10,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:10,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 196 [2022-11-25 18:02:10,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:10,966 INFO L130 PetriNetUnfolder]: 16/40 cut-off events. [2022-11-25 18:02:10,966 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:02:10,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 40 events. 16/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 94 event pairs, 12 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 70. Up to 39 conditions per place. [2022-11-25 18:02:10,968 INFO L137 encePairwiseOnDemand]: 191/196 looper letters, 9 selfloop transitions, 1 changer transitions 0/11 dead transitions. [2022-11-25 18:02:10,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 11 transitions, 47 flow [2022-11-25 18:02:10,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:10,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:10,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2022-11-25 18:02:10,990 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2022-11-25 18:02:10,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 254 transitions. [2022-11-25 18:02:10,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 254 transitions. [2022-11-25 18:02:10,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:10,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 254 transitions. [2022-11-25 18:02:11,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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 18:02:11,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 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 18:02:11,013 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 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 18:02:11,015 INFO L175 Difference]: Start difference. First operand has 17 places, 15 transitions, 35 flow. Second operand 3 states and 254 transitions. [2022-11-25 18:02:11,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 11 transitions, 47 flow [2022-11-25 18:02:11,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 11 transitions, 47 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:02:11,020 INFO L231 Difference]: Finished difference. Result has 15 places, 11 transitions, 29 flow [2022-11-25 18:02:11,022 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=27, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=29, PETRI_PLACES=15, PETRI_TRANSITIONS=11} [2022-11-25 18:02:11,026 INFO L288 CegarLoopForPetriNet]: 17 programPoint places, -2 predicate places. [2022-11-25 18:02:11,026 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 11 transitions, 29 flow [2022-11-25 18:02:11,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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 18:02:11,027 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:11,027 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:02:11,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:02:11,028 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2022-11-25 18:02:11,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:11,030 INFO L85 PathProgramCache]: Analyzing trace with hash 14581, now seen corresponding path program 1 times [2022-11-25 18:02:11,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:11,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540227732] [2022-11-25 18:02:11,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:11,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:11,147 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 18:02:11,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:11,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540227732] [2022-11-25 18:02:11,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540227732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:11,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:11,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:02:11,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393332881] [2022-11-25 18:02:11,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:11,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:02:11,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:11,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:02:11,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:02:11,194 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 196 [2022-11-25 18:02:11,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 11 transitions, 29 flow. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:11,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:11,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 196 [2022-11-25 18:02:11,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:11,216 INFO L130 PetriNetUnfolder]: 11/29 cut-off events. [2022-11-25 18:02:11,216 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:02:11,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 29 events. 11/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 57 event pairs, 8 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 58. Up to 28 conditions per place. [2022-11-25 18:02:11,217 INFO L137 encePairwiseOnDemand]: 194/196 looper letters, 8 selfloop transitions, 1 changer transitions 0/10 dead transitions. [2022-11-25 18:02:11,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 10 transitions, 45 flow [2022-11-25 18:02:11,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:11,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:11,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2022-11-25 18:02:11,220 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2022-11-25 18:02:11,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 244 transitions. [2022-11-25 18:02:11,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 244 transitions. [2022-11-25 18:02:11,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:11,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 244 transitions. [2022-11-25 18:02:11,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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 18:02:11,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 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 18:02:11,224 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 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 18:02:11,224 INFO L175 Difference]: Start difference. First operand has 15 places, 11 transitions, 29 flow. Second operand 3 states and 244 transitions. [2022-11-25 18:02:11,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 10 transitions, 45 flow [2022-11-25 18:02:11,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 10 transitions, 44 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:02:11,225 INFO L231 Difference]: Finished difference. Result has 15 places, 10 transitions, 28 flow [2022-11-25 18:02:11,225 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=28, PETRI_PLACES=15, PETRI_TRANSITIONS=10} [2022-11-25 18:02:11,226 INFO L288 CegarLoopForPetriNet]: 17 programPoint places, -2 predicate places. [2022-11-25 18:02:11,226 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 10 transitions, 28 flow [2022-11-25 18:02:11,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:11,227 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:11,227 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:02:11,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:02:11,227 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2022-11-25 18:02:11,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:11,228 INFO L85 PathProgramCache]: Analyzing trace with hash 434647886, now seen corresponding path program 1 times [2022-11-25 18:02:11,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:11,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112406862] [2022-11-25 18:02:11,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:11,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:11,553 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 18:02:11,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:11,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112406862] [2022-11-25 18:02:11,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112406862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:11,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:11,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:02:11,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073008069] [2022-11-25 18:02:11,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:11,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:02:11,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:11,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:02:11,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:02:11,643 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2022-11-25 18:02:11,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 10 transitions, 28 flow. Second operand has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 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 18:02:11,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:11,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2022-11-25 18:02:11,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:11,698 INFO L130 PetriNetUnfolder]: 17/44 cut-off events. [2022-11-25 18:02:11,698 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:02:11,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 44 events. 17/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 110 event pairs, 8 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 88. Up to 28 conditions per place. [2022-11-25 18:02:11,699 INFO L137 encePairwiseOnDemand]: 192/196 looper letters, 11 selfloop transitions, 3 changer transitions 0/15 dead transitions. [2022-11-25 18:02:11,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 15 transitions, 66 flow [2022-11-25 18:02:11,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:02:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:02:11,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 319 transitions. [2022-11-25 18:02:11,702 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40688775510204084 [2022-11-25 18:02:11,702 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 319 transitions. [2022-11-25 18:02:11,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 319 transitions. [2022-11-25 18:02:11,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:11,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 319 transitions. [2022-11-25 18:02:11,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 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 18:02:11,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 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 18:02:11,707 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 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 18:02:11,707 INFO L175 Difference]: Start difference. First operand has 15 places, 10 transitions, 28 flow. Second operand 4 states and 319 transitions. [2022-11-25 18:02:11,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 15 transitions, 66 flow [2022-11-25 18:02:11,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 15 transitions, 65 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:02:11,708 INFO L231 Difference]: Finished difference. Result has 18 places, 11 transitions, 41 flow [2022-11-25 18:02:11,709 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=27, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=41, PETRI_PLACES=18, PETRI_TRANSITIONS=11} [2022-11-25 18:02:11,710 INFO L288 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2022-11-25 18:02:11,711 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 11 transitions, 41 flow [2022-11-25 18:02:11,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 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 18:02:11,730 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:11,730 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:02:11,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:02:11,731 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2022-11-25 18:02:11,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:11,732 INFO L85 PathProgramCache]: Analyzing trace with hash 434647885, now seen corresponding path program 1 times [2022-11-25 18:02:11,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:11,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386461450] [2022-11-25 18:02:11,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:11,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:11,843 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 18:02:11,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:11,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386461450] [2022-11-25 18:02:11,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386461450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:11,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:11,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:02:11,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917818509] [2022-11-25 18:02:11,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:11,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:02:11,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:11,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:02:11,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:02:11,923 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 196 [2022-11-25 18:02:11,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 11 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 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 18:02:11,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:11,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 196 [2022-11-25 18:02:11,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:11,968 INFO L130 PetriNetUnfolder]: 13/34 cut-off events. [2022-11-25 18:02:11,968 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 18:02:11,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 34 events. 13/34 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 71 event pairs, 10 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 83. Up to 33 conditions per place. [2022-11-25 18:02:11,970 INFO L137 encePairwiseOnDemand]: 194/196 looper letters, 8 selfloop transitions, 1 changer transitions 0/10 dead transitions. [2022-11-25 18:02:11,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 57 flow [2022-11-25 18:02:11,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:11,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:11,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2022-11-25 18:02:11,972 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2022-11-25 18:02:11,975 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2022-11-25 18:02:11,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2022-11-25 18:02:11,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:11,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2022-11-25 18:02:11,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 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 18:02:11,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 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 18:02:11,981 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 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 18:02:11,982 INFO L175 Difference]: Start difference. First operand has 18 places, 11 transitions, 41 flow. Second operand 3 states and 234 transitions. [2022-11-25 18:02:11,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 57 flow [2022-11-25 18:02:11,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 10 transitions, 53 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:02:11,987 INFO L231 Difference]: Finished difference. Result has 17 places, 10 transitions, 37 flow [2022-11-25 18:02:11,988 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=35, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=37, PETRI_PLACES=17, PETRI_TRANSITIONS=10} [2022-11-25 18:02:11,989 INFO L288 CegarLoopForPetriNet]: 17 programPoint places, 0 predicate places. [2022-11-25 18:02:11,990 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 10 transitions, 37 flow [2022-11-25 18:02:11,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 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 18:02:11,990 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:11,990 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 18:02:11,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:02:11,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2022-11-25 18:02:11,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:11,994 INFO L85 PathProgramCache]: Analyzing trace with hash 589113461, now seen corresponding path program 1 times [2022-11-25 18:02:11,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:11,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473770626] [2022-11-25 18:02:11,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:11,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:02:12,014 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:02:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:02:12,046 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:02:12,046 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:02:12,048 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2022-11-25 18:02:12,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2022-11-25 18:02:12,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2022-11-25 18:02:12,051 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2022-11-25 18:02:12,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2022-11-25 18:02:12,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2022-11-25 18:02:12,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 10 remaining) [2022-11-25 18:02:12,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2022-11-25 18:02:12,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 10 remaining) [2022-11-25 18:02:12,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2022-11-25 18:02:12,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:02:12,054 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-25 18:02:12,056 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:02:12,057 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 18:02:12,105 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 18:02:12,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 143 transitions, 298 flow [2022-11-25 18:02:12,157 INFO L130 PetriNetUnfolder]: 17/177 cut-off events. [2022-11-25 18:02:12,157 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:02:12,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 177 events. 17/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 387 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 116. Up to 6 conditions per place. [2022-11-25 18:02:12,164 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 143 transitions, 298 flow [2022-11-25 18:02:12,166 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 143 transitions, 298 flow [2022-11-25 18:02:12,166 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:02:12,166 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 143 transitions, 298 flow [2022-11-25 18:02:12,176 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 143 transitions, 298 flow [2022-11-25 18:02:12,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 143 transitions, 298 flow [2022-11-25 18:02:12,203 INFO L130 PetriNetUnfolder]: 17/177 cut-off events. [2022-11-25 18:02:12,204 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:02:12,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 177 events. 17/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 387 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 116. Up to 6 conditions per place. [2022-11-25 18:02:12,212 INFO L119 LiptonReduction]: Number of co-enabled transitions 8624 [2022-11-25 18:02:15,862 INFO L134 LiptonReduction]: Checked pairs total: 12250 [2022-11-25 18:02:15,862 INFO L136 LiptonReduction]: Total number of compositions: 137 [2022-11-25 18:02:15,864 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:02:15,866 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;@36d025c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:02:15,868 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-11-25 18:02:15,870 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-11-25 18:02:15,871 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:02:15,872 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:15,872 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:02:15,872 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2022-11-25 18:02:15,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:15,873 INFO L85 PathProgramCache]: Analyzing trace with hash 25113, now seen corresponding path program 1 times [2022-11-25 18:02:15,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:15,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158900313] [2022-11-25 18:02:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:15,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:15,896 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 18:02:15,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:15,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158900313] [2022-11-25 18:02:15,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158900313] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:15,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:15,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:02:15,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566029347] [2022-11-25 18:02:15,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:15,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:02:15,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:15,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:02:15,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:02:15,909 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 280 [2022-11-25 18:02:15,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 39 transitions, 90 flow. Second operand has 2 states, 2 states have (on average 128.0) internal successors, (256), 2 states have internal predecessors, (256), 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 18:02:15,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:15,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 280 [2022-11-25 18:02:15,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:16,093 INFO L130 PetriNetUnfolder]: 404/780 cut-off events. [2022-11-25 18:02:16,094 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-25 18:02:16,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1419 conditions, 780 events. 404/780 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4588 event pairs, 312 based on Foata normal form. 59/502 useless extension candidates. Maximal degree in co-relation 344. Up to 601 conditions per place. [2022-11-25 18:02:16,100 INFO L137 encePairwiseOnDemand]: 274/280 looper letters, 20 selfloop transitions, 0 changer transitions 0/33 dead transitions. [2022-11-25 18:02:16,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 33 transitions, 118 flow [2022-11-25 18:02:16,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:02:16,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:02:16,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 280 transitions. [2022-11-25 18:02:16,103 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5 [2022-11-25 18:02:16,103 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 280 transitions. [2022-11-25 18:02:16,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 280 transitions. [2022-11-25 18:02:16,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:16,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 280 transitions. [2022-11-25 18:02:16,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 140.0) internal successors, (280), 2 states have internal predecessors, (280), 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 18:02:16,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 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 18:02:16,107 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 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 18:02:16,107 INFO L175 Difference]: Start difference. First operand has 36 places, 39 transitions, 90 flow. Second operand 2 states and 280 transitions. [2022-11-25 18:02:16,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 33 transitions, 118 flow [2022-11-25 18:02:16,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 33 transitions, 116 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-25 18:02:16,109 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 76 flow [2022-11-25 18:02:16,109 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2022-11-25 18:02:16,112 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2022-11-25 18:02:16,113 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 76 flow [2022-11-25 18:02:16,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 128.0) internal successors, (256), 2 states have internal predecessors, (256), 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 18:02:16,113 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:16,113 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:02:16,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 18:02:16,114 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2022-11-25 18:02:16,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:16,114 INFO L85 PathProgramCache]: Analyzing trace with hash 25103, now seen corresponding path program 1 times [2022-11-25 18:02:16,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:16,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843549276] [2022-11-25 18:02:16,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:16,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:16,167 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 18:02:16,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:16,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843549276] [2022-11-25 18:02:16,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843549276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:16,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:16,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:02:16,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883883373] [2022-11-25 18:02:16,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:16,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:02:16,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:16,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:02:16,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:02:16,203 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 280 [2022-11-25 18:02:16,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 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 18:02:16,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:16,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 280 [2022-11-25 18:02:16,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:16,289 INFO L130 PetriNetUnfolder]: 291/578 cut-off events. [2022-11-25 18:02:16,289 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 18:02:16,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1050 conditions, 578 events. 291/578 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3184 event pairs, 222 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 1045. Up to 438 conditions per place. [2022-11-25 18:02:16,294 INFO L137 encePairwiseOnDemand]: 278/280 looper letters, 18 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2022-11-25 18:02:16,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 112 flow [2022-11-25 18:02:16,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:16,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:16,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2022-11-25 18:02:16,296 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4630952380952381 [2022-11-25 18:02:16,296 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2022-11-25 18:02:16,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2022-11-25 18:02:16,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:16,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2022-11-25 18:02:16,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 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 18:02:16,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 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 18:02:16,300 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 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 18:02:16,300 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 76 flow. Second operand 3 states and 389 transitions. [2022-11-25 18:02:16,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 112 flow [2022-11-25 18:02:16,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 112 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:02:16,301 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 76 flow [2022-11-25 18:02:16,301 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2022-11-25 18:02:16,302 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2022-11-25 18:02:16,302 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 76 flow [2022-11-25 18:02:16,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 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 18:02:16,303 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:16,303 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:02:16,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 18:02:16,303 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2022-11-25 18:02:16,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:16,304 INFO L85 PathProgramCache]: Analyzing trace with hash 25105, now seen corresponding path program 1 times [2022-11-25 18:02:16,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:16,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513046366] [2022-11-25 18:02:16,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:16,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:16,327 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 18:02:16,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:16,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513046366] [2022-11-25 18:02:16,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513046366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:16,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:16,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:02:16,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782356397] [2022-11-25 18:02:16,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:16,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:02:16,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:16,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:02:16,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:02:16,358 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 280 [2022-11-25 18:02:16,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 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 18:02:16,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:16,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 280 [2022-11-25 18:02:16,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:16,421 INFO L130 PetriNetUnfolder]: 178/376 cut-off events. [2022-11-25 18:02:16,421 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 18:02:16,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 688 conditions, 376 events. 178/376 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1856 event pairs, 132 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 682. Up to 276 conditions per place. [2022-11-25 18:02:16,424 INFO L137 encePairwiseOnDemand]: 278/280 looper letters, 17 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2022-11-25 18:02:16,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 110 flow [2022-11-25 18:02:16,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2022-11-25 18:02:16,426 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2022-11-25 18:02:16,426 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2022-11-25 18:02:16,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2022-11-25 18:02:16,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:16,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2022-11-25 18:02:16,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 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 18:02:16,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 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 18:02:16,430 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 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 18:02:16,430 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 382 transitions. [2022-11-25 18:02:16,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 110 flow [2022-11-25 18:02:16,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 109 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:02:16,431 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 75 flow [2022-11-25 18:02:16,431 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2022-11-25 18:02:16,432 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2022-11-25 18:02:16,432 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 75 flow [2022-11-25 18:02:16,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 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 18:02:16,433 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:16,433 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:02:16,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 18:02:16,433 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2022-11-25 18:02:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:16,433 INFO L85 PathProgramCache]: Analyzing trace with hash 748492267, now seen corresponding path program 1 times [2022-11-25 18:02:16,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:16,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219762205] [2022-11-25 18:02:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:16,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:16,506 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 18:02:16,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:16,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219762205] [2022-11-25 18:02:16,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219762205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:16,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:16,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:02:16,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969877662] [2022-11-25 18:02:16,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:16,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:02:16,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:16,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:02:16,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:02:16,602 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 280 [2022-11-25 18:02:16,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:16,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:16,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 280 [2022-11-25 18:02:16,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:16,699 INFO L130 PetriNetUnfolder]: 135/294 cut-off events. [2022-11-25 18:02:16,699 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 18:02:16,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534 conditions, 294 events. 135/294 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1339 event pairs, 95 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 528. Up to 207 conditions per place. [2022-11-25 18:02:16,701 INFO L137 encePairwiseOnDemand]: 277/280 looper letters, 15 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2022-11-25 18:02:16,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 103 flow [2022-11-25 18:02:16,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:16,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:16,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2022-11-25 18:02:16,704 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2022-11-25 18:02:16,704 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2022-11-25 18:02:16,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2022-11-25 18:02:16,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:16,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2022-11-25 18:02:16,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 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 18:02:16,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 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 18:02:16,708 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 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 18:02:16,708 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 75 flow. Second operand 3 states and 366 transitions. [2022-11-25 18:02:16,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 103 flow [2022-11-25 18:02:16,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 29 transitions, 102 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:02:16,710 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 72 flow [2022-11-25 18:02:16,710 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2022-11-25 18:02:16,711 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2022-11-25 18:02:16,712 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 72 flow [2022-11-25 18:02:16,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:16,712 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:16,712 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:02:16,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 18:02:16,713 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2022-11-25 18:02:16,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:16,713 INFO L85 PathProgramCache]: Analyzing trace with hash 748492268, now seen corresponding path program 1 times [2022-11-25 18:02:16,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:16,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150857355] [2022-11-25 18:02:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:16,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:16,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:16,900 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 18:02:16,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:16,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150857355] [2022-11-25 18:02:16,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150857355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:16,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:16,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:02:16,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332862906] [2022-11-25 18:02:16,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:16,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:02:16,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:16,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:02:16,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:02:17,001 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 280 [2022-11-25 18:02:17,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 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 18:02:17,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:17,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 280 [2022-11-25 18:02:17,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:17,106 INFO L130 PetriNetUnfolder]: 153/318 cut-off events. [2022-11-25 18:02:17,106 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 18:02:17,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 318 events. 153/318 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1466 event pairs, 95 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 590. Up to 207 conditions per place. [2022-11-25 18:02:17,108 INFO L137 encePairwiseOnDemand]: 275/280 looper letters, 22 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2022-11-25 18:02:17,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 145 flow [2022-11-25 18:02:17,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:02:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:02:17,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 503 transitions. [2022-11-25 18:02:17,111 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44910714285714287 [2022-11-25 18:02:17,111 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 503 transitions. [2022-11-25 18:02:17,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 503 transitions. [2022-11-25 18:02:17,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:17,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 503 transitions. [2022-11-25 18:02:17,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 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 18:02:17,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 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 18:02:17,115 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 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 18:02:17,116 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 72 flow. Second operand 4 states and 503 transitions. [2022-11-25 18:02:17,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 145 flow [2022-11-25 18:02:17,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:02:17,117 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 87 flow [2022-11-25 18:02:17,117 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=87, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2022-11-25 18:02:17,118 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2022-11-25 18:02:17,118 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 87 flow [2022-11-25 18:02:17,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 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 18:02:17,119 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:17,119 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:02:17,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 18:02:17,119 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2022-11-25 18:02:17,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:17,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1728426552, now seen corresponding path program 1 times [2022-11-25 18:02:17,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:17,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055085032] [2022-11-25 18:02:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:17,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:17,303 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 18:02:17,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:17,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055085032] [2022-11-25 18:02:17,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055085032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:17,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389658120] [2022-11-25 18:02:17,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:17,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:17,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:17,311 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:17,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:02:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:17,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 18:02:17,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:17,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:02:17,494 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 18:02:17,734 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 18:02:17,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:17,911 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 18:02:17,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389658120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:17,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:17,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-25 18:02:17,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710333349] [2022-11-25 18:02:17,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:17,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:02:17,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:17,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:02:17,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:02:18,291 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 280 [2022-11-25 18:02:18,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 87 flow. Second operand has 11 states, 11 states have (on average 118.63636363636364) internal successors, (1305), 11 states have internal predecessors, (1305), 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 18:02:18,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:18,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 280 [2022-11-25 18:02:18,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:18,699 INFO L130 PetriNetUnfolder]: 453/961 cut-off events. [2022-11-25 18:02:18,700 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2022-11-25 18:02:18,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1878 conditions, 961 events. 453/961 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6250 event pairs, 77 based on Foata normal form. 0/737 useless extension candidates. Maximal degree in co-relation 1871. Up to 184 conditions per place. [2022-11-25 18:02:18,707 INFO L137 encePairwiseOnDemand]: 276/280 looper letters, 55 selfloop transitions, 7 changer transitions 0/75 dead transitions. [2022-11-25 18:02:18,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 75 transitions, 335 flow [2022-11-25 18:02:18,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:02:18,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:02:18,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 883 transitions. [2022-11-25 18:02:18,711 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45051020408163267 [2022-11-25 18:02:18,711 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 883 transitions. [2022-11-25 18:02:18,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 883 transitions. [2022-11-25 18:02:18,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:18,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 883 transitions. [2022-11-25 18:02:18,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 126.14285714285714) internal successors, (883), 7 states have internal predecessors, (883), 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 18:02:18,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 280.0) internal successors, (2240), 8 states have internal predecessors, (2240), 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 18:02:18,720 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 280.0) internal successors, (2240), 8 states have internal predecessors, (2240), 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 18:02:18,720 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 87 flow. Second operand 7 states and 883 transitions. [2022-11-25 18:02:18,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 75 transitions, 335 flow [2022-11-25 18:02:18,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 75 transitions, 329 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 18:02:18,723 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 127 flow [2022-11-25 18:02:18,723 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=127, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2022-11-25 18:02:18,724 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2022-11-25 18:02:18,724 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 127 flow [2022-11-25 18:02:18,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 118.63636363636364) internal successors, (1305), 11 states have internal predecessors, (1305), 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 18:02:18,725 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:18,725 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-25 18:02:18,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:18,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 18:02:18,931 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2022-11-25 18:02:18,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:18,931 INFO L85 PathProgramCache]: Analyzing trace with hash 2041618284, now seen corresponding path program 2 times [2022-11-25 18:02:18,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:18,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857749647] [2022-11-25 18:02:18,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:18,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:19,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:19,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857749647] [2022-11-25 18:02:19,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857749647] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:19,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754991045] [2022-11-25 18:02:19,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:02:19,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:19,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:19,012 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:19,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:02:19,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:02:19,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:19,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:02:19,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:19,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:02:19,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754991045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:19,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:02:19,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-25 18:02:19,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225609572] [2022-11-25 18:02:19,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:19,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:02:19,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:19,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:02:19,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:02:19,156 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 280 [2022-11-25 18:02:19,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 121.4) internal successors, (607), 5 states have internal predecessors, (607), 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 18:02:19,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:19,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 280 [2022-11-25 18:02:19,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:19,308 INFO L130 PetriNetUnfolder]: 217/484 cut-off events. [2022-11-25 18:02:19,308 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2022-11-25 18:02:19,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 986 conditions, 484 events. 217/484 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2794 event pairs, 5 based on Foata normal form. 28/440 useless extension candidates. Maximal degree in co-relation 976. Up to 238 conditions per place. [2022-11-25 18:02:19,312 INFO L137 encePairwiseOnDemand]: 276/280 looper letters, 37 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2022-11-25 18:02:19,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 238 flow [2022-11-25 18:02:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:02:19,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:02:19,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 643 transitions. [2022-11-25 18:02:19,314 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4592857142857143 [2022-11-25 18:02:19,314 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 643 transitions. [2022-11-25 18:02:19,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 643 transitions. [2022-11-25 18:02:19,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:19,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 643 transitions. [2022-11-25 18:02:19,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 128.6) internal successors, (643), 5 states have internal predecessors, (643), 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 18:02:19,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 280.0) internal successors, (1680), 6 states have internal predecessors, (1680), 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 18:02:19,320 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 280.0) internal successors, (1680), 6 states have internal predecessors, (1680), 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 18:02:19,320 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 127 flow. Second operand 5 states and 643 transitions. [2022-11-25 18:02:19,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 238 flow [2022-11-25 18:02:19,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 54 transitions, 229 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-25 18:02:19,323 INFO L231 Difference]: Finished difference. Result has 43 places, 30 transitions, 97 flow [2022-11-25 18:02:19,324 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=97, PETRI_PLACES=43, PETRI_TRANSITIONS=30} [2022-11-25 18:02:19,324 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 7 predicate places. [2022-11-25 18:02:19,324 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 30 transitions, 97 flow [2022-11-25 18:02:19,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.4) internal successors, (607), 5 states have internal predecessors, (607), 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 18:02:19,325 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:19,325 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:19,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:19,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 18:02:19,531 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2022-11-25 18:02:19,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:19,531 INFO L85 PathProgramCache]: Analyzing trace with hash -980297004, now seen corresponding path program 1 times [2022-11-25 18:02:19,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:19,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228216908] [2022-11-25 18:02:19,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:19,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:02:19,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:19,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228216908] [2022-11-25 18:02:19,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228216908] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:19,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:19,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:02:19,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117226098] [2022-11-25 18:02:19,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:19,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:02:19,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:19,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:02:19,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:02:19,795 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 280 [2022-11-25 18:02:19,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 30 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 120.5) internal successors, (482), 4 states have internal predecessors, (482), 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 18:02:19,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:19,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 280 [2022-11-25 18:02:19,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:19,944 INFO L130 PetriNetUnfolder]: 345/771 cut-off events. [2022-11-25 18:02:19,945 INFO L131 PetriNetUnfolder]: For 392/392 co-relation queries the response was YES. [2022-11-25 18:02:19,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1628 conditions, 771 events. 345/771 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4805 event pairs, 167 based on Foata normal form. 0/660 useless extension candidates. Maximal degree in co-relation 1619. Up to 329 conditions per place. [2022-11-25 18:02:19,951 INFO L137 encePairwiseOnDemand]: 276/280 looper letters, 26 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2022-11-25 18:02:19,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 42 transitions, 203 flow [2022-11-25 18:02:19,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:02:19,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:02:19,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 502 transitions. [2022-11-25 18:02:19,953 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44821428571428573 [2022-11-25 18:02:19,953 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 502 transitions. [2022-11-25 18:02:19,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 502 transitions. [2022-11-25 18:02:19,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:19,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 502 transitions. [2022-11-25 18:02:19,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.5) internal successors, (502), 4 states have internal predecessors, (502), 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 18:02:19,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 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 18:02:19,958 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 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 18:02:19,958 INFO L175 Difference]: Start difference. First operand has 43 places, 30 transitions, 97 flow. Second operand 4 states and 502 transitions. [2022-11-25 18:02:19,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 42 transitions, 203 flow [2022-11-25 18:02:19,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 181 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-25 18:02:19,961 INFO L231 Difference]: Finished difference. Result has 44 places, 31 transitions, 100 flow [2022-11-25 18:02:19,962 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=44, PETRI_TRANSITIONS=31} [2022-11-25 18:02:19,962 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 8 predicate places. [2022-11-25 18:02:19,962 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 31 transitions, 100 flow [2022-11-25 18:02:19,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.5) internal successors, (482), 4 states have internal predecessors, (482), 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 18:02:19,963 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:19,963 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:19,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 18:02:19,964 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2022-11-25 18:02:19,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:19,964 INFO L85 PathProgramCache]: Analyzing trace with hash -324433116, now seen corresponding path program 1 times [2022-11-25 18:02:19,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:19,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164344810] [2022-11-25 18:02:19,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:19,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:02:20,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:20,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164344810] [2022-11-25 18:02:20,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164344810] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:20,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128881801] [2022-11-25 18:02:20,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:20,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:20,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:20,281 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:20,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:02:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:20,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 18:02:20,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:20,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:02:20,388 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 18:02:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:02:20,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:02:20,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128881801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:20,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:20,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-25 18:02:20,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623137446] [2022-11-25 18:02:20,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:20,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:02:20,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:20,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:02:20,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:02:21,039 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 280 [2022-11-25 18:02:21,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 31 transitions, 100 flow. Second operand has 11 states, 11 states have (on average 119.9090909090909) internal successors, (1319), 11 states have internal predecessors, (1319), 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 18:02:21,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:21,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 280 [2022-11-25 18:02:21,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:21,414 INFO L130 PetriNetUnfolder]: 477/1063 cut-off events. [2022-11-25 18:02:21,414 INFO L131 PetriNetUnfolder]: For 251/251 co-relation queries the response was YES. [2022-11-25 18:02:21,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2188 conditions, 1063 events. 477/1063 cut-off events. For 251/251 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7242 event pairs, 167 based on Foata normal form. 0/973 useless extension candidates. Maximal degree in co-relation 2178. Up to 329 conditions per place. [2022-11-25 18:02:21,422 INFO L137 encePairwiseOnDemand]: 276/280 looper letters, 37 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2022-11-25 18:02:21,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 54 transitions, 256 flow [2022-11-25 18:02:21,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:02:21,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:02:21,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 626 transitions. [2022-11-25 18:02:21,425 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4471428571428571 [2022-11-25 18:02:21,425 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 626 transitions. [2022-11-25 18:02:21,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 626 transitions. [2022-11-25 18:02:21,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:21,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 626 transitions. [2022-11-25 18:02:21,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.2) internal successors, (626), 5 states have internal predecessors, (626), 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 18:02:21,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 280.0) internal successors, (1680), 6 states have internal predecessors, (1680), 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 18:02:21,430 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 280.0) internal successors, (1680), 6 states have internal predecessors, (1680), 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 18:02:21,431 INFO L175 Difference]: Start difference. First operand has 44 places, 31 transitions, 100 flow. Second operand 5 states and 626 transitions. [2022-11-25 18:02:21,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 54 transitions, 256 flow [2022-11-25 18:02:21,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:02:21,436 INFO L231 Difference]: Finished difference. Result has 47 places, 32 transitions, 114 flow [2022-11-25 18:02:21,436 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=47, PETRI_TRANSITIONS=32} [2022-11-25 18:02:21,437 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2022-11-25 18:02:21,437 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 114 flow [2022-11-25 18:02:21,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 119.9090909090909) internal successors, (1319), 11 states have internal predecessors, (1319), 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 18:02:21,438 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:21,438 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:21,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:21,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:21,644 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2022-11-25 18:02:21,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:21,645 INFO L85 PathProgramCache]: Analyzing trace with hash 759344483, now seen corresponding path program 1 times [2022-11-25 18:02:21,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:21,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093901405] [2022-11-25 18:02:21,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:21,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:21,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:21,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093901405] [2022-11-25 18:02:21,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093901405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:21,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:21,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:02:21,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696246914] [2022-11-25 18:02:21,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:21,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:02:21,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:21,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:02:21,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:02:21,701 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 280 [2022-11-25 18:02:21,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 32 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 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 18:02:21,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:21,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 280 [2022-11-25 18:02:21,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:21,940 INFO L130 PetriNetUnfolder]: 869/1764 cut-off events. [2022-11-25 18:02:21,940 INFO L131 PetriNetUnfolder]: For 429/429 co-relation queries the response was YES. [2022-11-25 18:02:21,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3823 conditions, 1764 events. 869/1764 cut-off events. For 429/429 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 12662 event pairs, 403 based on Foata normal form. 0/1584 useless extension candidates. Maximal degree in co-relation 3812. Up to 890 conditions per place. [2022-11-25 18:02:21,953 INFO L137 encePairwiseOnDemand]: 275/280 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2022-11-25 18:02:21,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 45 transitions, 241 flow [2022-11-25 18:02:21,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:21,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 383 transitions. [2022-11-25 18:02:21,955 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45595238095238094 [2022-11-25 18:02:21,956 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 383 transitions. [2022-11-25 18:02:21,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 383 transitions. [2022-11-25 18:02:21,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:21,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 383 transitions. [2022-11-25 18:02:21,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 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 18:02:21,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 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 18:02:21,959 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 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 18:02:21,959 INFO L175 Difference]: Start difference. First operand has 47 places, 32 transitions, 114 flow. Second operand 3 states and 383 transitions. [2022-11-25 18:02:21,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 45 transitions, 241 flow [2022-11-25 18:02:21,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 227 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-25 18:02:21,962 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 132 flow [2022-11-25 18:02:21,962 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2022-11-25 18:02:21,963 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 12 predicate places. [2022-11-25 18:02:21,963 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 132 flow [2022-11-25 18:02:21,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 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 18:02:21,963 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:21,963 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 18:02:21,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 18:02:21,964 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2022-11-25 18:02:21,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:21,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1476522771, now seen corresponding path program 1 times [2022-11-25 18:02:21,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:21,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264113681] [2022-11-25 18:02:21,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:21,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:02:21,979 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:02:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:02:21,991 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:02:21,991 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:02:21,991 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2022-11-25 18:02:21,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2022-11-25 18:02:21,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2022-11-25 18:02:21,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (9 of 13 remaining) [2022-11-25 18:02:21,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (8 of 13 remaining) [2022-11-25 18:02:21,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2022-11-25 18:02:21,993 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2022-11-25 18:02:21,993 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2022-11-25 18:02:21,993 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2022-11-25 18:02:21,993 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 13 remaining) [2022-11-25 18:02:21,993 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2022-11-25 18:02:21,994 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2022-11-25 18:02:21,995 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2022-11-25 18:02:21,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 18:02:21,995 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:21,996 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:02:21,996 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 18:02:22,029 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 18:02:22,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 193 transitions, 407 flow [2022-11-25 18:02:22,082 INFO L130 PetriNetUnfolder]: 25/245 cut-off events. [2022-11-25 18:02:22,082 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 18:02:22,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 245 events. 25/245 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 691 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 181. Up to 8 conditions per place. [2022-11-25 18:02:22,084 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 193 transitions, 407 flow [2022-11-25 18:02:22,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 193 transitions, 407 flow [2022-11-25 18:02:22,087 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:02:22,087 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 193 transitions, 407 flow [2022-11-25 18:02:22,088 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 193 transitions, 407 flow [2022-11-25 18:02:22,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 193 transitions, 407 flow [2022-11-25 18:02:22,123 INFO L130 PetriNetUnfolder]: 25/245 cut-off events. [2022-11-25 18:02:22,123 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 18:02:22,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 245 events. 25/245 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 691 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 181. Up to 8 conditions per place. [2022-11-25 18:02:22,135 INFO L119 LiptonReduction]: Number of co-enabled transitions 20286 [2022-11-25 18:02:27,588 INFO L134 LiptonReduction]: Checked pairs total: 30449 [2022-11-25 18:02:27,589 INFO L136 LiptonReduction]: Total number of compositions: 185 [2022-11-25 18:02:27,591 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:02:27,591 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;@36d025c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:02:27,592 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2022-11-25 18:02:27,593 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 18:02:27,593 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:02:27,593 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:27,594 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:02:27,594 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 18:02:27,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:27,594 INFO L85 PathProgramCache]: Analyzing trace with hash 38812, now seen corresponding path program 1 times [2022-11-25 18:02:27,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:27,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337418564] [2022-11-25 18:02:27,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:27,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:27,651 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 18:02:27,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:27,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337418564] [2022-11-25 18:02:27,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337418564] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:27,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:27,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:02:27,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697442089] [2022-11-25 18:02:27,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:27,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:02:27,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:27,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:02:27,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:02:27,686 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 378 [2022-11-25 18:02:27,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 54 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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 18:02:27,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:27,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 378 [2022-11-25 18:02:27,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:28,466 INFO L130 PetriNetUnfolder]: 3231/5255 cut-off events. [2022-11-25 18:02:28,467 INFO L131 PetriNetUnfolder]: For 421/421 co-relation queries the response was YES. [2022-11-25 18:02:28,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9865 conditions, 5255 events. 3231/5255 cut-off events. For 421/421 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 34609 event pairs, 2574 based on Foata normal form. 478/3647 useless extension candidates. Maximal degree in co-relation 1065. Up to 4260 conditions per place. [2022-11-25 18:02:28,531 INFO L137 encePairwiseOnDemand]: 368/378 looper letters, 26 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2022-11-25 18:02:28,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 165 flow [2022-11-25 18:02:28,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:28,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:28,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 534 transitions. [2022-11-25 18:02:28,534 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2022-11-25 18:02:28,534 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 534 transitions. [2022-11-25 18:02:28,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 534 transitions. [2022-11-25 18:02:28,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:28,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 534 transitions. [2022-11-25 18:02:28,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 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 18:02:28,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 18:02:28,539 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 18:02:28,539 INFO L175 Difference]: Start difference. First operand has 49 places, 54 transitions, 129 flow. Second operand 3 states and 534 transitions. [2022-11-25 18:02:28,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 165 flow [2022-11-25 18:02:28,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 45 transitions, 159 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-25 18:02:28,544 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 107 flow [2022-11-25 18:02:28,545 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2022-11-25 18:02:28,545 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2022-11-25 18:02:28,545 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 107 flow [2022-11-25 18:02:28,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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 18:02:28,546 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:28,546 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:02:28,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 18:02:28,547 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 18:02:28,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:28,547 INFO L85 PathProgramCache]: Analyzing trace with hash 38813, now seen corresponding path program 1 times [2022-11-25 18:02:28,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:28,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182144756] [2022-11-25 18:02:28,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:28,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:28,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:28,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182144756] [2022-11-25 18:02:28,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182144756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:28,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:28,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:02:28,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086253373] [2022-11-25 18:02:28,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:28,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:02:28,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:28,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:02:28,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:02:28,649 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 378 [2022-11-25 18:02:28,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 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 18:02:28,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:28,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 378 [2022-11-25 18:02:28,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:29,169 INFO L130 PetriNetUnfolder]: 2040/3436 cut-off events. [2022-11-25 18:02:29,170 INFO L131 PetriNetUnfolder]: For 154/154 co-relation queries the response was YES. [2022-11-25 18:02:29,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6381 conditions, 3436 events. 2040/3436 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 21509 event pairs, 1602 based on Foata normal form. 0/2293 useless extension candidates. Maximal degree in co-relation 6372. Up to 2726 conditions per place. [2022-11-25 18:02:29,195 INFO L137 encePairwiseOnDemand]: 376/378 looper letters, 25 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2022-11-25 18:02:29,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 157 flow [2022-11-25 18:02:29,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:29,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2022-11-25 18:02:29,198 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2022-11-25 18:02:29,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2022-11-25 18:02:29,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2022-11-25 18:02:29,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:29,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2022-11-25 18:02:29,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 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 18:02:29,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 18:02:29,203 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 18:02:29,203 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 107 flow. Second operand 3 states and 519 transitions. [2022-11-25 18:02:29,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 157 flow [2022-11-25 18:02:29,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:02:29,205 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 106 flow [2022-11-25 18:02:29,205 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2022-11-25 18:02:29,206 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2022-11-25 18:02:29,206 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 106 flow [2022-11-25 18:02:29,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 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 18:02:29,207 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:29,207 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:02:29,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 18:02:29,207 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 18:02:29,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:29,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1157215319, now seen corresponding path program 1 times [2022-11-25 18:02:29,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:29,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817211482] [2022-11-25 18:02:29,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:29,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:29,350 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 18:02:29,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:29,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817211482] [2022-11-25 18:02:29,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817211482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:29,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:29,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:02:29,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935009889] [2022-11-25 18:02:29,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:29,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:02:29,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:29,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:02:29,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:02:29,484 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 378 [2022-11-25 18:02:29,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 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 18:02:29,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:29,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 378 [2022-11-25 18:02:29,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:30,135 INFO L130 PetriNetUnfolder]: 2602/4190 cut-off events. [2022-11-25 18:02:30,135 INFO L131 PetriNetUnfolder]: For 202/202 co-relation queries the response was YES. [2022-11-25 18:02:30,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7962 conditions, 4190 events. 2602/4190 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 26462 event pairs, 1462 based on Foata normal form. 0/2739 useless extension candidates. Maximal degree in co-relation 7952. Up to 2726 conditions per place. [2022-11-25 18:02:30,170 INFO L137 encePairwiseOnDemand]: 373/378 looper letters, 42 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2022-11-25 18:02:30,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 63 transitions, 244 flow [2022-11-25 18:02:30,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:02:30,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:02:30,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 695 transitions. [2022-11-25 18:02:30,173 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45965608465608465 [2022-11-25 18:02:30,173 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 695 transitions. [2022-11-25 18:02:30,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 695 transitions. [2022-11-25 18:02:30,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:30,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 695 transitions. [2022-11-25 18:02:30,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 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 18:02:30,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 378.0) internal successors, (1890), 5 states have internal predecessors, (1890), 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 18:02:30,179 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 378.0) internal successors, (1890), 5 states have internal predecessors, (1890), 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 18:02:30,180 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 106 flow. Second operand 4 states and 695 transitions. [2022-11-25 18:02:30,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 63 transitions, 244 flow [2022-11-25 18:02:30,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 63 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:02:30,182 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 121 flow [2022-11-25 18:02:30,182 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2022-11-25 18:02:30,183 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2022-11-25 18:02:30,183 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 121 flow [2022-11-25 18:02:30,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 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 18:02:30,184 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:30,184 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:02:30,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 18:02:30,185 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 18:02:30,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:30,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1157215318, now seen corresponding path program 1 times [2022-11-25 18:02:30,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:30,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990310164] [2022-11-25 18:02:30,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:30,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:30,251 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 18:02:30,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:30,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990310164] [2022-11-25 18:02:30,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990310164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:30,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:30,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:02:30,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068158239] [2022-11-25 18:02:30,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:30,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:02:30,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:30,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:02:30,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:02:30,326 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 378 [2022-11-25 18:02:30,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 158.25) internal successors, (633), 4 states have internal predecessors, (633), 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 18:02:30,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:30,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 378 [2022-11-25 18:02:30,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:30,716 INFO L130 PetriNetUnfolder]: 1541/2656 cut-off events. [2022-11-25 18:02:30,717 INFO L131 PetriNetUnfolder]: For 557/557 co-relation queries the response was YES. [2022-11-25 18:02:30,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5413 conditions, 2656 events. 1541/2656 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15976 event pairs, 1175 based on Foata normal form. 172/2141 useless extension candidates. Maximal degree in co-relation 5401. Up to 2047 conditions per place. [2022-11-25 18:02:30,738 INFO L137 encePairwiseOnDemand]: 374/378 looper letters, 23 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2022-11-25 18:02:30,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 42 transitions, 163 flow [2022-11-25 18:02:30,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:30,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:30,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 497 transitions. [2022-11-25 18:02:30,741 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4382716049382716 [2022-11-25 18:02:30,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 497 transitions. [2022-11-25 18:02:30,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 497 transitions. [2022-11-25 18:02:30,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:30,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 497 transitions. [2022-11-25 18:02:30,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 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 18:02:30,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 18:02:30,747 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 18:02:30,747 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 121 flow. Second operand 3 states and 497 transitions. [2022-11-25 18:02:30,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 42 transitions, 163 flow [2022-11-25 18:02:30,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 42 transitions, 157 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 18:02:30,749 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 111 flow [2022-11-25 18:02:30,749 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2022-11-25 18:02:30,750 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2022-11-25 18:02:30,750 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 111 flow [2022-11-25 18:02:30,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.25) internal successors, (633), 4 states have internal predecessors, (633), 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 18:02:30,751 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:30,751 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:02:30,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-25 18:02:30,751 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 18:02:30,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:30,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1513941525, now seen corresponding path program 1 times [2022-11-25 18:02:30,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:30,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824348808] [2022-11-25 18:02:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:30,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:30,989 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 18:02:30,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:30,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824348808] [2022-11-25 18:02:30,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824348808] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:30,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003542104] [2022-11-25 18:02:30,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:30,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:30,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:30,994 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:31,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:02:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:31,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 18:02:31,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:31,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:02:31,131 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 18:02:31,254 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 18:02:31,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:31,358 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 18:02:31,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003542104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:31,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:31,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-25 18:02:31,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029193570] [2022-11-25 18:02:31,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:31,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:02:31,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:31,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:02:31,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:02:31,904 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 378 [2022-11-25 18:02:31,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 111 flow. Second operand has 11 states, 11 states have (on average 160.63636363636363) internal successors, (1767), 11 states have internal predecessors, (1767), 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 18:02:31,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:31,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 378 [2022-11-25 18:02:31,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:32,782 INFO L130 PetriNetUnfolder]: 2451/4139 cut-off events. [2022-11-25 18:02:32,783 INFO L131 PetriNetUnfolder]: For 382/382 co-relation queries the response was YES. [2022-11-25 18:02:32,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8143 conditions, 4139 events. 2451/4139 cut-off events. For 382/382 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 27591 event pairs, 849 based on Foata normal form. 0/3085 useless extension candidates. Maximal degree in co-relation 8131. Up to 1755 conditions per place. [2022-11-25 18:02:32,820 INFO L137 encePairwiseOnDemand]: 374/378 looper letters, 54 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2022-11-25 18:02:32,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 76 transitions, 319 flow [2022-11-25 18:02:32,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:02:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:02:32,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 854 transitions. [2022-11-25 18:02:32,823 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45185185185185184 [2022-11-25 18:02:32,824 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 854 transitions. [2022-11-25 18:02:32,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 854 transitions. [2022-11-25 18:02:32,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:32,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 854 transitions. [2022-11-25 18:02:32,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 170.8) internal successors, (854), 5 states have internal predecessors, (854), 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 18:02:32,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 378.0) internal successors, (2268), 6 states have internal predecessors, (2268), 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 18:02:32,831 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 378.0) internal successors, (2268), 6 states have internal predecessors, (2268), 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 18:02:32,831 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 111 flow. Second operand 5 states and 854 transitions. [2022-11-25 18:02:32,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 76 transitions, 319 flow [2022-11-25 18:02:32,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 76 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:02:32,834 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 128 flow [2022-11-25 18:02:32,834 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2022-11-25 18:02:32,835 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2022-11-25 18:02:32,835 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 128 flow [2022-11-25 18:02:32,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 160.63636363636363) internal successors, (1767), 11 states have internal predecessors, (1767), 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 18:02:32,851 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:32,852 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-25 18:02:32,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:33,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:33,052 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 18:02:33,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:33,053 INFO L85 PathProgramCache]: Analyzing trace with hash -312447977, now seen corresponding path program 2 times [2022-11-25 18:02:33,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:33,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430732125] [2022-11-25 18:02:33,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:33,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:33,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:33,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430732125] [2022-11-25 18:02:33,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430732125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:33,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889613126] [2022-11-25 18:02:33,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:02:33,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:33,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:33,120 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:33,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:02:33,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:02:33,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:33,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:02:33,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:33,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:02:33,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889613126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:33,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:02:33,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-25 18:02:33,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915798332] [2022-11-25 18:02:33,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:33,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:02:33,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:33,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:02:33,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:02:33,285 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 378 [2022-11-25 18:02:33,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 164.4) internal successors, (822), 5 states have internal predecessors, (822), 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 18:02:33,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:33,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 378 [2022-11-25 18:02:33,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:33,981 INFO L130 PetriNetUnfolder]: 2161/3786 cut-off events. [2022-11-25 18:02:33,982 INFO L131 PetriNetUnfolder]: For 462/462 co-relation queries the response was YES. [2022-11-25 18:02:33,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7540 conditions, 3786 events. 2161/3786 cut-off events. For 462/462 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26758 event pairs, 95 based on Foata normal form. 86/3159 useless extension candidates. Maximal degree in co-relation 7526. Up to 2044 conditions per place. [2022-11-25 18:02:34,019 INFO L137 encePairwiseOnDemand]: 374/378 looper letters, 65 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2022-11-25 18:02:34,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 87 transitions, 378 flow [2022-11-25 18:02:34,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:02:34,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:02:34,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 886 transitions. [2022-11-25 18:02:34,023 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4687830687830688 [2022-11-25 18:02:34,023 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 886 transitions. [2022-11-25 18:02:34,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 886 transitions. [2022-11-25 18:02:34,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:34,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 886 transitions. [2022-11-25 18:02:34,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 177.2) internal successors, (886), 5 states have internal predecessors, (886), 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 18:02:34,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 378.0) internal successors, (2268), 6 states have internal predecessors, (2268), 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 18:02:34,030 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 378.0) internal successors, (2268), 6 states have internal predecessors, (2268), 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 18:02:34,030 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 128 flow. Second operand 5 states and 886 transitions. [2022-11-25 18:02:34,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 87 transitions, 378 flow [2022-11-25 18:02:34,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 87 transitions, 370 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:02:34,035 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 125 flow [2022-11-25 18:02:34,036 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=125, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2022-11-25 18:02:34,036 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2022-11-25 18:02:34,036 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 125 flow [2022-11-25 18:02:34,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 164.4) internal successors, (822), 5 states have internal predecessors, (822), 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 18:02:34,037 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:34,037 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:34,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-25 18:02:34,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-25 18:02:34,243 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 18:02:34,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:34,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1644290105, now seen corresponding path program 1 times [2022-11-25 18:02:34,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:34,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035360876] [2022-11-25 18:02:34,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:34,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:02:34,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:34,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035360876] [2022-11-25 18:02:34,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035360876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:34,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:34,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:02:34,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361731251] [2022-11-25 18:02:34,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:34,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:02:34,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:34,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:02:34,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:02:34,472 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 378 [2022-11-25 18:02:34,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 163.5) internal successors, (654), 4 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:34,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:34,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 378 [2022-11-25 18:02:34,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:35,384 INFO L130 PetriNetUnfolder]: 3545/6195 cut-off events. [2022-11-25 18:02:35,384 INFO L131 PetriNetUnfolder]: For 2840/2840 co-relation queries the response was YES. [2022-11-25 18:02:35,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12993 conditions, 6195 events. 3545/6195 cut-off events. For 2840/2840 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 45857 event pairs, 1715 based on Foata normal form. 0/5025 useless extension candidates. Maximal degree in co-relation 12980. Up to 2837 conditions per place. [2022-11-25 18:02:35,455 INFO L137 encePairwiseOnDemand]: 374/378 looper letters, 40 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2022-11-25 18:02:35,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 277 flow [2022-11-25 18:02:35,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:02:35,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:02:35,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 688 transitions. [2022-11-25 18:02:35,459 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2022-11-25 18:02:35,459 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 688 transitions. [2022-11-25 18:02:35,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 688 transitions. [2022-11-25 18:02:35,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:35,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 688 transitions. [2022-11-25 18:02:35,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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 18:02:35,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 378.0) internal successors, (1890), 5 states have internal predecessors, (1890), 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 18:02:35,467 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 378.0) internal successors, (1890), 5 states have internal predecessors, (1890), 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 18:02:35,467 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 125 flow. Second operand 4 states and 688 transitions. [2022-11-25 18:02:35,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 277 flow [2022-11-25 18:02:35,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 255 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-25 18:02:35,471 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 128 flow [2022-11-25 18:02:35,471 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2022-11-25 18:02:35,472 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2022-11-25 18:02:35,472 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 128 flow [2022-11-25 18:02:35,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.5) internal successors, (654), 4 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:35,473 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:35,473 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:35,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-25 18:02:35,473 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 18:02:35,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:35,474 INFO L85 PathProgramCache]: Analyzing trace with hash -566609248, now seen corresponding path program 1 times [2022-11-25 18:02:35,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:35,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629416798] [2022-11-25 18:02:35,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:35,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:02:35,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:35,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629416798] [2022-11-25 18:02:35,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629416798] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:35,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555931297] [2022-11-25 18:02:35,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:35,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:35,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:35,771 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:35,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:02:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:35,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 18:02:35,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:35,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:02:35,917 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 18:02:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:02:36,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:02:36,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555931297] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:36,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:36,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-25 18:02:36,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516774654] [2022-11-25 18:02:36,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:36,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:02:36,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:36,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:02:36,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:02:36,795 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 378 [2022-11-25 18:02:36,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 128 flow. Second operand has 11 states, 11 states have (on average 162.9090909090909) internal successors, (1792), 11 states have internal predecessors, (1792), 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 18:02:36,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:36,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 378 [2022-11-25 18:02:36,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:37,865 INFO L130 PetriNetUnfolder]: 3643/6271 cut-off events. [2022-11-25 18:02:37,866 INFO L131 PetriNetUnfolder]: For 1848/1848 co-relation queries the response was YES. [2022-11-25 18:02:37,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13324 conditions, 6271 events. 3643/6271 cut-off events. For 1848/1848 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 45992 event pairs, 1175 based on Foata normal form. 0/5454 useless extension candidates. Maximal degree in co-relation 13309. Up to 2047 conditions per place. [2022-11-25 18:02:37,918 INFO L137 encePairwiseOnDemand]: 374/378 looper letters, 58 selfloop transitions, 4 changer transitions 0/80 dead transitions. [2022-11-25 18:02:37,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 80 transitions, 362 flow [2022-11-25 18:02:37,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:02:37,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:02:37,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 862 transitions. [2022-11-25 18:02:37,921 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4560846560846561 [2022-11-25 18:02:37,921 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 862 transitions. [2022-11-25 18:02:37,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 862 transitions. [2022-11-25 18:02:37,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:37,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 862 transitions. [2022-11-25 18:02:37,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 172.4) internal successors, (862), 5 states have internal predecessors, (862), 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 18:02:37,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 378.0) internal successors, (2268), 6 states have internal predecessors, (2268), 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 18:02:37,928 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 378.0) internal successors, (2268), 6 states have internal predecessors, (2268), 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 18:02:37,928 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 128 flow. Second operand 5 states and 862 transitions. [2022-11-25 18:02:37,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 80 transitions, 362 flow [2022-11-25 18:02:37,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 80 transitions, 358 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:02:37,931 INFO L231 Difference]: Finished difference. Result has 56 places, 44 transitions, 142 flow [2022-11-25 18:02:37,931 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=56, PETRI_TRANSITIONS=44} [2022-11-25 18:02:37,932 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2022-11-25 18:02:37,932 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 44 transitions, 142 flow [2022-11-25 18:02:37,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 162.9090909090909) internal successors, (1792), 11 states have internal predecessors, (1792), 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 18:02:37,933 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:37,933 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:37,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:38,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:38,139 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 18:02:38,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:38,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1018834195, now seen corresponding path program 1 times [2022-11-25 18:02:38,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:38,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661619023] [2022-11-25 18:02:38,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:38,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:38,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:38,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661619023] [2022-11-25 18:02:38,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661619023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:38,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:38,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:02:38,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927872953] [2022-11-25 18:02:38,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:38,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:02:38,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:38,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:02:38,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:02:38,195 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 378 [2022-11-25 18:02:38,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 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 18:02:38,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:38,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 378 [2022-11-25 18:02:38,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:39,504 INFO L130 PetriNetUnfolder]: 7620/12237 cut-off events. [2022-11-25 18:02:39,505 INFO L131 PetriNetUnfolder]: For 4031/4031 co-relation queries the response was YES. [2022-11-25 18:02:39,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26630 conditions, 12237 events. 7620/12237 cut-off events. For 4031/4031 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 90194 event pairs, 3942 based on Foata normal form. 0/10515 useless extension candidates. Maximal degree in co-relation 26614. Up to 7581 conditions per place. [2022-11-25 18:02:39,601 INFO L137 encePairwiseOnDemand]: 372/378 looper letters, 48 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2022-11-25 18:02:39,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 65 transitions, 322 flow [2022-11-25 18:02:39,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:39,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:39,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 525 transitions. [2022-11-25 18:02:39,603 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2022-11-25 18:02:39,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 525 transitions. [2022-11-25 18:02:39,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 525 transitions. [2022-11-25 18:02:39,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:39,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 525 transitions. [2022-11-25 18:02:39,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 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 18:02:39,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 18:02:39,609 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 18:02:39,609 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 142 flow. Second operand 3 states and 525 transitions. [2022-11-25 18:02:39,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 65 transitions, 322 flow [2022-11-25 18:02:39,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 65 transitions, 308 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-25 18:02:39,614 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 168 flow [2022-11-25 18:02:39,614 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2022-11-25 18:02:39,615 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 8 predicate places. [2022-11-25 18:02:39,615 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 168 flow [2022-11-25 18:02:39,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 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 18:02:39,616 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:39,616 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:39,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-25 18:02:39,617 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 18:02:39,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:39,617 INFO L85 PathProgramCache]: Analyzing trace with hash -385012455, now seen corresponding path program 2 times [2022-11-25 18:02:39,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:39,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042608076] [2022-11-25 18:02:39,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:39,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:02:39,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:39,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042608076] [2022-11-25 18:02:39,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042608076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:39,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724017744] [2022-11-25 18:02:39,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:02:39,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:39,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:39,684 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:39,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:02:39,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:02:39,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:39,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:02:39,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:02:39,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:02:39,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724017744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:39,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:02:39,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-25 18:02:39,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189367376] [2022-11-25 18:02:39,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:39,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:02:39,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:39,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:02:39,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:02:39,821 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 378 [2022-11-25 18:02:39,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 164.6) internal successors, (823), 5 states have internal predecessors, (823), 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 18:02:39,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:39,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 378 [2022-11-25 18:02:39,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:40,839 INFO L130 PetriNetUnfolder]: 4282/7871 cut-off events. [2022-11-25 18:02:40,839 INFO L131 PetriNetUnfolder]: For 2479/2567 co-relation queries the response was YES. [2022-11-25 18:02:40,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16838 conditions, 7871 events. 4282/7871 cut-off events. For 2479/2567 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 64636 event pairs, 155 based on Foata normal form. 112/7117 useless extension candidates. Maximal degree in co-relation 16822. Up to 4575 conditions per place. [2022-11-25 18:02:40,887 INFO L137 encePairwiseOnDemand]: 374/378 looper letters, 70 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2022-11-25 18:02:40,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 95 transitions, 475 flow [2022-11-25 18:02:40,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:02:40,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:02:40,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 880 transitions. [2022-11-25 18:02:40,890 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2022-11-25 18:02:40,891 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 880 transitions. [2022-11-25 18:02:40,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 880 transitions. [2022-11-25 18:02:40,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:40,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 880 transitions. [2022-11-25 18:02:40,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 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 18:02:40,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 378.0) internal successors, (2268), 6 states have internal predecessors, (2268), 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 18:02:40,897 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 378.0) internal successors, (2268), 6 states have internal predecessors, (2268), 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 18:02:40,897 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 168 flow. Second operand 5 states and 880 transitions. [2022-11-25 18:02:40,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 95 transitions, 475 flow [2022-11-25 18:02:40,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 95 transitions, 455 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:02:40,905 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 158 flow [2022-11-25 18:02:40,906 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2022-11-25 18:02:40,906 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2022-11-25 18:02:40,906 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 158 flow [2022-11-25 18:02:40,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 164.6) internal successors, (823), 5 states have internal predecessors, (823), 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 18:02:40,907 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:40,907 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:40,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:41,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 18:02:41,115 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 18:02:41,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:41,116 INFO L85 PathProgramCache]: Analyzing trace with hash 815395499, now seen corresponding path program 1 times [2022-11-25 18:02:41,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:41,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161152084] [2022-11-25 18:02:41,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:41,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 18:02:41,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:41,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161152084] [2022-11-25 18:02:41,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161152084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:41,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:41,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:02:41,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872335749] [2022-11-25 18:02:41,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:41,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:02:41,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:41,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:02:41,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:02:41,338 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 378 [2022-11-25 18:02:41,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 163.75) internal successors, (655), 4 states have internal predecessors, (655), 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 18:02:41,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:41,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 378 [2022-11-25 18:02:41,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:42,160 INFO L130 PetriNetUnfolder]: 4768/8296 cut-off events. [2022-11-25 18:02:42,161 INFO L131 PetriNetUnfolder]: For 3124/3258 co-relation queries the response was YES. [2022-11-25 18:02:42,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18407 conditions, 8296 events. 4768/8296 cut-off events. For 3124/3258 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 62556 event pairs, 3273 based on Foata normal form. 0/7347 useless extension candidates. Maximal degree in co-relation 18393. Up to 5645 conditions per place. [2022-11-25 18:02:42,203 INFO L137 encePairwiseOnDemand]: 373/378 looper letters, 42 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2022-11-25 18:02:42,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 65 transitions, 316 flow [2022-11-25 18:02:42,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:02:42,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:02:42,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 683 transitions. [2022-11-25 18:02:42,206 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45171957671957674 [2022-11-25 18:02:42,206 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 683 transitions. [2022-11-25 18:02:42,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 683 transitions. [2022-11-25 18:02:42,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:42,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 683 transitions. [2022-11-25 18:02:42,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 170.75) internal successors, (683), 4 states have internal predecessors, (683), 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 18:02:42,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 378.0) internal successors, (1890), 5 states have internal predecessors, (1890), 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 18:02:42,212 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 378.0) internal successors, (1890), 5 states have internal predecessors, (1890), 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 18:02:42,212 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 158 flow. Second operand 4 states and 683 transitions. [2022-11-25 18:02:42,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 65 transitions, 316 flow [2022-11-25 18:02:42,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 298 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-11-25 18:02:42,216 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 165 flow [2022-11-25 18:02:42,216 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2022-11-25 18:02:42,216 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 8 predicate places. [2022-11-25 18:02:42,217 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 165 flow [2022-11-25 18:02:42,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.75) internal successors, (655), 4 states have internal predecessors, (655), 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 18:02:42,217 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:42,217 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:42,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-25 18:02:42,217 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 18:02:42,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:42,218 INFO L85 PathProgramCache]: Analyzing trace with hash -723600702, now seen corresponding path program 1 times [2022-11-25 18:02:42,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:42,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251712343] [2022-11-25 18:02:42,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:42,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:02:42,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:42,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251712343] [2022-11-25 18:02:42,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251712343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:42,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:42,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:02:42,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110751476] [2022-11-25 18:02:42,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:42,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:02:42,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:42,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:02:42,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:02:42,278 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 378 [2022-11-25 18:02:42,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 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 18:02:42,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:42,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 378 [2022-11-25 18:02:42,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:42,738 INFO L130 PetriNetUnfolder]: 2461/4150 cut-off events. [2022-11-25 18:02:42,738 INFO L131 PetriNetUnfolder]: For 1597/1650 co-relation queries the response was YES. [2022-11-25 18:02:42,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9926 conditions, 4150 events. 2461/4150 cut-off events. For 1597/1650 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 26569 event pairs, 1622 based on Foata normal form. 126/3815 useless extension candidates. Maximal degree in co-relation 9910. Up to 2907 conditions per place. [2022-11-25 18:02:42,755 INFO L137 encePairwiseOnDemand]: 375/378 looper letters, 42 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2022-11-25 18:02:42,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 64 transitions, 316 flow [2022-11-25 18:02:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:42,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:42,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2022-11-25 18:02:42,757 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2022-11-25 18:02:42,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2022-11-25 18:02:42,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2022-11-25 18:02:42,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:42,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2022-11-25 18:02:42,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 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 18:02:42,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 18:02:42,762 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 18:02:42,762 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 165 flow. Second operand 3 states and 528 transitions. [2022-11-25 18:02:42,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 64 transitions, 316 flow [2022-11-25 18:02:42,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 64 transitions, 306 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-25 18:02:42,768 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 159 flow [2022-11-25 18:02:42,768 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2022-11-25 18:02:42,769 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 8 predicate places. [2022-11-25 18:02:42,769 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 159 flow [2022-11-25 18:02:42,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 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 18:02:42,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:42,770 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:42,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-25 18:02:42,770 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 18:02:42,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:42,771 INFO L85 PathProgramCache]: Analyzing trace with hash -492537506, now seen corresponding path program 1 times [2022-11-25 18:02:42,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:42,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984870158] [2022-11-25 18:02:42,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:42,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 18:02:42,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:42,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984870158] [2022-11-25 18:02:42,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984870158] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:42,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382245748] [2022-11-25 18:02:42,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:42,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:42,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:42,956 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:42,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:02:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:43,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 18:02:43,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:43,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:02:43,075 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 18:02:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 18:02:43,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 18:02:43,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382245748] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:43,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:43,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-25 18:02:43,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330646493] [2022-11-25 18:02:43,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:43,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:02:43,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:43,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:02:43,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:02:43,783 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 378 [2022-11-25 18:02:43,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 159 flow. Second operand has 11 states, 11 states have (on average 161.1818181818182) internal successors, (1773), 11 states have internal predecessors, (1773), 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 18:02:43,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:43,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 378 [2022-11-25 18:02:43,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:44,733 INFO L130 PetriNetUnfolder]: 3862/6744 cut-off events. [2022-11-25 18:02:44,733 INFO L131 PetriNetUnfolder]: For 2307/2392 co-relation queries the response was YES. [2022-11-25 18:02:44,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15597 conditions, 6744 events. 3862/6744 cut-off events. For 2307/2392 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 48937 event pairs, 1647 based on Foata normal form. 0/6033 useless extension candidates. Maximal degree in co-relation 15582. Up to 2941 conditions per place. [2022-11-25 18:02:44,771 INFO L137 encePairwiseOnDemand]: 374/378 looper letters, 59 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2022-11-25 18:02:44,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 83 transitions, 411 flow [2022-11-25 18:02:44,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:02:44,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:02:44,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 844 transitions. [2022-11-25 18:02:44,775 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44656084656084655 [2022-11-25 18:02:44,775 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 844 transitions. [2022-11-25 18:02:44,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 844 transitions. [2022-11-25 18:02:44,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:44,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 844 transitions. [2022-11-25 18:02:44,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.8) internal successors, (844), 5 states have internal predecessors, (844), 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 18:02:44,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 378.0) internal successors, (2268), 6 states have internal predecessors, (2268), 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 18:02:44,783 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 378.0) internal successors, (2268), 6 states have internal predecessors, (2268), 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 18:02:44,783 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 159 flow. Second operand 5 states and 844 transitions. [2022-11-25 18:02:44,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 83 transitions, 411 flow [2022-11-25 18:02:44,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 83 transitions, 399 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:02:44,789 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 173 flow [2022-11-25 18:02:44,790 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2022-11-25 18:02:44,790 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 11 predicate places. [2022-11-25 18:02:44,790 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 173 flow [2022-11-25 18:02:44,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 161.1818181818182) internal successors, (1773), 11 states have internal predecessors, (1773), 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 18:02:44,791 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:44,791 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:44,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:44,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 18:02:44,997 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thr1Err2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 18:02:44,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:44,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1862633897, now seen corresponding path program 1 times [2022-11-25 18:02:44,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:44,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852691698] [2022-11-25 18:02:44,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:44,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:45,030 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 18:02:45,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:45,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852691698] [2022-11-25 18:02:45,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852691698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:45,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:45,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:02:45,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122991413] [2022-11-25 18:02:45,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:45,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:02:45,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:45,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:02:45,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:02:45,069 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 378 [2022-11-25 18:02:45,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:45,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:45,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 378 [2022-11-25 18:02:45,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:46,725 INFO L130 PetriNetUnfolder]: 7422/12068 cut-off events. [2022-11-25 18:02:46,725 INFO L131 PetriNetUnfolder]: For 4919/4995 co-relation queries the response was YES. [2022-11-25 18:02:46,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29147 conditions, 12068 events. 7422/12068 cut-off events. For 4919/4995 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 89091 event pairs, 3735 based on Foata normal form. 0/11184 useless extension candidates. Maximal degree in co-relation 29130. Up to 7076 conditions per place. [2022-11-25 18:02:46,803 INFO L137 encePairwiseOnDemand]: 372/378 looper letters, 52 selfloop transitions, 7 changer transitions 0/71 dead transitions. [2022-11-25 18:02:46,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 71 transitions, 386 flow [2022-11-25 18:02:46,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:46,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:46,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2022-11-25 18:02:46,808 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2022-11-25 18:02:46,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2022-11-25 18:02:46,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2022-11-25 18:02:46,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:46,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2022-11-25 18:02:46,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 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 18:02:46,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 18:02:46,813 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 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 18:02:46,813 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 173 flow. Second operand 3 states and 522 transitions. [2022-11-25 18:02:46,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 71 transitions, 386 flow [2022-11-25 18:02:46,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 71 transitions, 376 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 18:02:46,830 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 219 flow [2022-11-25 18:02:46,831 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2022-11-25 18:02:46,831 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 12 predicate places. [2022-11-25 18:02:46,832 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 219 flow [2022-11-25 18:02:46,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:46,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:46,832 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 18:02:46,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-25 18:02:46,833 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 18:02:46,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:46,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1899157361, now seen corresponding path program 1 times [2022-11-25 18:02:46,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:46,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066278108] [2022-11-25 18:02:46,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:46,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:02:46,846 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:02:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:02:46,858 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:02:46,858 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:02:46,858 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2022-11-25 18:02:46,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2022-11-25 18:02:46,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2022-11-25 18:02:46,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (12 of 16 remaining) [2022-11-25 18:02:46,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (11 of 16 remaining) [2022-11-25 18:02:46,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2022-11-25 18:02:46,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2022-11-25 18:02:46,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2022-11-25 18:02:46,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2022-11-25 18:02:46,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (6 of 16 remaining) [2022-11-25 18:02:46,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2022-11-25 18:02:46,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2022-11-25 18:02:46,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 16 remaining) [2022-11-25 18:02:46,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2022-11-25 18:02:46,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2022-11-25 18:02:46,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2022-11-25 18:02:46,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-25 18:02:46,862 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:46,863 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:02:46,863 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 18:02:46,897 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 18:02:46,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 243 transitions, 518 flow [2022-11-25 18:02:46,959 INFO L130 PetriNetUnfolder]: 33/313 cut-off events. [2022-11-25 18:02:46,959 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 18:02:46,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 313 events. 33/313 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1010 event pairs, 0 based on Foata normal form. 0/248 useless extension candidates. Maximal degree in co-relation 253. Up to 10 conditions per place. [2022-11-25 18:02:46,963 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 243 transitions, 518 flow [2022-11-25 18:02:46,967 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 223 places, 243 transitions, 518 flow [2022-11-25 18:02:46,967 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:02:46,968 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 223 places, 243 transitions, 518 flow [2022-11-25 18:02:46,968 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 223 places, 243 transitions, 518 flow [2022-11-25 18:02:46,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 243 transitions, 518 flow [2022-11-25 18:02:47,025 INFO L130 PetriNetUnfolder]: 33/313 cut-off events. [2022-11-25 18:02:47,026 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 18:02:47,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 313 events. 33/313 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1010 event pairs, 0 based on Foata normal form. 0/248 useless extension candidates. Maximal degree in co-relation 253. Up to 10 conditions per place. [2022-11-25 18:02:47,049 INFO L119 LiptonReduction]: Number of co-enabled transitions 36848 [2022-11-25 18:02:53,215 INFO L134 LiptonReduction]: Checked pairs total: 54965 [2022-11-25 18:02:53,215 INFO L136 LiptonReduction]: Total number of compositions: 237 [2022-11-25 18:02:53,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:02:53,217 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;@36d025c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:02:53,218 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-11-25 18:02:53,219 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 18:02:53,219 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:02:53,219 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:53,220 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:02:53,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2022-11-25 18:02:53,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:53,220 INFO L85 PathProgramCache]: Analyzing trace with hash 55573, now seen corresponding path program 1 times [2022-11-25 18:02:53,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:53,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27436683] [2022-11-25 18:02:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:53,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:53,241 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 18:02:53,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:53,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27436683] [2022-11-25 18:02:53,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27436683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:53,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:53,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:02:53,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348591579] [2022-11-25 18:02:53,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:53,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:02:53,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:53,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:02:53,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:02:53,282 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 480 [2022-11-25 18:02:53,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 69 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 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 18:02:53,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:53,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 480 [2022-11-25 18:02:53,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:58,280 INFO L130 PetriNetUnfolder]: 31014/45197 cut-off events. [2022-11-25 18:02:58,280 INFO L131 PetriNetUnfolder]: For 5321/5321 co-relation queries the response was YES. [2022-11-25 18:02:58,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86530 conditions, 45197 events. 31014/45197 cut-off events. For 5321/5321 co-relation queries the response was YES. Maximal size of possible extension queue 2521. Compared 329606 event pairs, 25212 based on Foata normal form. 4545/31535 useless extension candidates. Maximal degree in co-relation 9959. Up to 38217 conditions per place. [2022-11-25 18:02:58,702 INFO L137 encePairwiseOnDemand]: 468/480 looper letters, 34 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2022-11-25 18:02:58,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 58 transitions, 218 flow [2022-11-25 18:02:58,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:58,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 667 transitions. [2022-11-25 18:02:58,705 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46319444444444446 [2022-11-25 18:02:58,705 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 667 transitions. [2022-11-25 18:02:58,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 667 transitions. [2022-11-25 18:02:58,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:58,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 667 transitions. [2022-11-25 18:02:58,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 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 18:02:58,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 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 18:02:58,711 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 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 18:02:58,711 INFO L175 Difference]: Start difference. First operand has 62 places, 69 transitions, 170 flow. Second operand 3 states and 667 transitions. [2022-11-25 18:02:58,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 58 transitions, 218 flow [2022-11-25 18:02:58,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 58 transitions, 206 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-25 18:02:58,720 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 138 flow [2022-11-25 18:02:58,721 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2022-11-25 18:02:58,722 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -1 predicate places. [2022-11-25 18:02:58,722 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 138 flow [2022-11-25 18:02:58,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 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 18:02:58,722 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:58,723 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:02:58,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-25 18:02:58,723 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2022-11-25 18:02:58,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:58,724 INFO L85 PathProgramCache]: Analyzing trace with hash 55572, now seen corresponding path program 1 times [2022-11-25 18:02:58,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:58,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796947698] [2022-11-25 18:02:58,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:58,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:58,761 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 18:02:58,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:58,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796947698] [2022-11-25 18:02:58,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796947698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:58,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:58,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:02:58,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759610159] [2022-11-25 18:02:58,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:58,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:02:58,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:58,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:02:58,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:02:58,802 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 480 [2022-11-25 18:02:58,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 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 18:02:58,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:58,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 480 [2022-11-25 18:02:58,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:03:02,024 INFO L130 PetriNetUnfolder]: 19876/29658 cut-off events. [2022-11-25 18:03:02,024 INFO L131 PetriNetUnfolder]: For 1099/1099 co-relation queries the response was YES. [2022-11-25 18:03:02,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55837 conditions, 29658 events. 19876/29658 cut-off events. For 1099/1099 co-relation queries the response was YES. Maximal size of possible extension queue 1567. Compared 210398 event pairs, 16008 based on Foata normal form. 0/19254 useless extension candidates. Maximal degree in co-relation 55827. Up to 24678 conditions per place. [2022-11-25 18:03:02,190 INFO L137 encePairwiseOnDemand]: 478/480 looper letters, 33 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2022-11-25 18:03:02,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 57 transitions, 204 flow [2022-11-25 18:03:02,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:03:02,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:03:02,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 659 transitions. [2022-11-25 18:03:02,191 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4576388888888889 [2022-11-25 18:03:02,192 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 659 transitions. [2022-11-25 18:03:02,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 659 transitions. [2022-11-25 18:03:02,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:03:02,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 659 transitions. [2022-11-25 18:03:02,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 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 18:03:02,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 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 18:03:02,196 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 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 18:03:02,196 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 138 flow. Second operand 3 states and 659 transitions. [2022-11-25 18:03:02,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 57 transitions, 204 flow [2022-11-25 18:03:02,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 57 transitions, 203 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:03:02,199 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 137 flow [2022-11-25 18:03:02,199 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2022-11-25 18:03:02,200 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -1 predicate places. [2022-11-25 18:03:02,200 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 137 flow [2022-11-25 18:03:02,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 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 18:03:02,200 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:03:02,200 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:03:02,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-25 18:03:02,201 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2022-11-25 18:03:02,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:03:02,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1656987857, now seen corresponding path program 1 times [2022-11-25 18:03:02,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:03:02,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890065069] [2022-11-25 18:03:02,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:03:02,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:03:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:03:02,275 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 18:03:02,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:03:02,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890065069] [2022-11-25 18:03:02,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890065069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:03:02,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:03:02,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:03:02,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309742173] [2022-11-25 18:03:02,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:03:02,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:03:02,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:03:02,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:03:02,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:03:02,364 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 480 [2022-11-25 18:03:02,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 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 18:03:02,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:03:02,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 480 [2022-11-25 18:03:02,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:03:04,865 INFO L130 PetriNetUnfolder]: 11043/16837 cut-off events. [2022-11-25 18:03:04,865 INFO L131 PetriNetUnfolder]: For 702/702 co-relation queries the response was YES. [2022-11-25 18:03:04,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31437 conditions, 16837 events. 11043/16837 cut-off events. For 702/702 co-relation queries the response was YES. Maximal size of possible extension queue 834. Compared 113578 event pairs, 8555 based on Foata normal form. 0/12120 useless extension candidates. Maximal degree in co-relation 31426. Up to 13635 conditions per place. [2022-11-25 18:03:04,970 INFO L137 encePairwiseOnDemand]: 475/480 looper letters, 29 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2022-11-25 18:03:04,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 53 transitions, 189 flow [2022-11-25 18:03:04,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:03:04,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:03:04,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2022-11-25 18:03:04,972 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43819444444444444 [2022-11-25 18:03:04,973 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2022-11-25 18:03:04,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2022-11-25 18:03:04,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:03:04,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2022-11-25 18:03:04,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 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 18:03:04,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 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 18:03:04,976 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 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 18:03:04,976 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 137 flow. Second operand 3 states and 631 transitions. [2022-11-25 18:03:04,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 53 transitions, 189 flow [2022-11-25 18:03:04,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 53 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:03:04,979 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 130 flow [2022-11-25 18:03:04,979 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2022-11-25 18:03:04,980 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -4 predicate places. [2022-11-25 18:03:04,980 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 130 flow [2022-11-25 18:03:04,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 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 18:03:04,980 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:03:04,981 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:03:04,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-25 18:03:04,981 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2022-11-25 18:03:04,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:03:04,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1656987858, now seen corresponding path program 1 times [2022-11-25 18:03:04,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:03:04,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450323711] [2022-11-25 18:03:04,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:03:04,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:03:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:03:05,113 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 18:03:05,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:03:05,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450323711] [2022-11-25 18:03:05,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450323711] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:03:05,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:03:05,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:03:05,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452018168] [2022-11-25 18:03:05,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:03:05,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:03:05,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:03:05,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:03:05,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:03:05,239 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 480 [2022-11-25 18:03:05,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 206.25) internal successors, (825), 4 states have internal predecessors, (825), 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 18:03:05,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:03:05,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 480 [2022-11-25 18:03:05,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:03:07,760 INFO L130 PetriNetUnfolder]: 12795/19099 cut-off events. [2022-11-25 18:03:07,760 INFO L131 PetriNetUnfolder]: For 831/831 co-relation queries the response was YES. [2022-11-25 18:03:07,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36101 conditions, 19099 events. 12795/19099 cut-off events. For 831/831 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 127818 event pairs, 8555 based on Foata normal form. 0/13898 useless extension candidates. Maximal degree in co-relation 36089. Up to 13635 conditions per place. [2022-11-25 18:03:07,902 INFO L137 encePairwiseOnDemand]: 475/480 looper letters, 50 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2022-11-25 18:03:07,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 76 transitions, 297 flow [2022-11-25 18:03:07,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:03:07,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:03:07,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 875 transitions. [2022-11-25 18:03:07,906 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4557291666666667 [2022-11-25 18:03:07,906 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 875 transitions. [2022-11-25 18:03:07,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 875 transitions. [2022-11-25 18:03:07,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:03:07,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 875 transitions. [2022-11-25 18:03:07,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 218.75) internal successors, (875), 4 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 18:03:07,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 480.0) internal successors, (2400), 5 states have internal predecessors, (2400), 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 18:03:07,914 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 480.0) internal successors, (2400), 5 states have internal predecessors, (2400), 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 18:03:07,916 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 130 flow. Second operand 4 states and 875 transitions. [2022-11-25 18:03:07,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 76 transitions, 297 flow [2022-11-25 18:03:07,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 76 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:03:07,925 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 145 flow [2022-11-25 18:03:07,925 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2022-11-25 18:03:07,926 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -1 predicate places. [2022-11-25 18:03:07,927 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 145 flow [2022-11-25 18:03:07,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 206.25) internal successors, (825), 4 states have internal predecessors, (825), 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 18:03:07,927 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:03:07,928 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:03:07,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-25 18:03:07,928 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2022-11-25 18:03:07,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:03:07,931 INFO L85 PathProgramCache]: Analyzing trace with hash -172978243, now seen corresponding path program 1 times [2022-11-25 18:03:07,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:03:07,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846137015] [2022-11-25 18:03:07,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:03:07,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:03:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:03:08,234 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 18:03:08,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:03:08,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846137015] [2022-11-25 18:03:08,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846137015] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:03:08,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443839274] [2022-11-25 18:03:08,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:03:08,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:03:08,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:03:08,237 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:03:08,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 18:03:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:03:08,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 18:03:08,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:03:08,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:03:08,370 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 18:03:08,473 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 18:03:08,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:03:08,568 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 18:03:08,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443839274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:03:08,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:03:08,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2022-11-25 18:03:08,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554698339] [2022-11-25 18:03:08,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:03:08,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:03:08,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:03:08,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:03:08,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:03:09,103 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 480 [2022-11-25 18:03:09,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 145 flow. Second operand has 12 states, 12 states have (on average 202.5) internal successors, (2430), 12 states have internal predecessors, (2430), 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 18:03:09,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:03:09,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 480 [2022-11-25 18:03:09,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:03:12,742 INFO L130 PetriNetUnfolder]: 20331/30781 cut-off events. [2022-11-25 18:03:12,742 INFO L131 PetriNetUnfolder]: For 3421/3421 co-relation queries the response was YES. [2022-11-25 18:03:12,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61533 conditions, 30781 events. 20331/30781 cut-off events. For 3421/3421 co-relation queries the response was YES. Maximal size of possible extension queue 1491. Compared 229598 event pairs, 8555 based on Foata normal form. 0/22568 useless extension candidates. Maximal degree in co-relation 61519. Up to 13635 conditions per place. [2022-11-25 18:03:13,034 INFO L137 encePairwiseOnDemand]: 476/480 looper letters, 75 selfloop transitions, 4 changer transitions 0/102 dead transitions. [2022-11-25 18:03:13,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 102 transitions, 433 flow [2022-11-25 18:03:13,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:03:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:03:13,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1085 transitions. [2022-11-25 18:03:13,037 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45208333333333334 [2022-11-25 18:03:13,038 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1085 transitions. [2022-11-25 18:03:13,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1085 transitions. [2022-11-25 18:03:13,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:03:13,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1085 transitions. [2022-11-25 18:03:13,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 217.0) internal successors, (1085), 5 states have internal predecessors, (1085), 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 18:03:13,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 480.0) internal successors, (2880), 6 states have internal predecessors, (2880), 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 18:03:13,046 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 480.0) internal successors, (2880), 6 states have internal predecessors, (2880), 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 18:03:13,046 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 145 flow. Second operand 5 states and 1085 transitions. [2022-11-25 18:03:13,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 102 transitions, 433 flow [2022-11-25 18:03:13,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 102 transitions, 427 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 18:03:13,051 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 157 flow [2022-11-25 18:03:13,051 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2022-11-25 18:03:13,052 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2022-11-25 18:03:13,052 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 157 flow [2022-11-25 18:03:13,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 202.5) internal successors, (2430), 12 states have internal predecessors, (2430), 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 18:03:13,053 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:03:13,053 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-25 18:03:13,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:03:13,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-25 18:03:13,259 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2022-11-25 18:03:13,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:03:13,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1067352526, now seen corresponding path program 2 times [2022-11-25 18:03:13,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:03:13,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935645532] [2022-11-25 18:03:13,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:03:13,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:03:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:03:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:03:13,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:03:13,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935645532] [2022-11-25 18:03:13,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935645532] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:03:13,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346620894] [2022-11-25 18:03:13,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:03:13,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:03:13,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:03:13,327 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:03:13,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 18:03:13,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:03:13,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:03:13,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:03:13,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:03:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:03:13,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:03:13,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346620894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:03:13,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:03:13,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-25 18:03:13,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6083227] [2022-11-25 18:03:13,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:03:13,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:03:13,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:03:13,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:03:13,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:03:13,488 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 480 [2022-11-25 18:03:13,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 207.4) internal successors, (1037), 5 states have internal predecessors, (1037), 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 18:03:13,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:03:13,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 480 [2022-11-25 18:03:13,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:03:16,697 INFO L130 PetriNetUnfolder]: 18145/28267 cut-off events. [2022-11-25 18:03:16,697 INFO L131 PetriNetUnfolder]: For 3872/3872 co-relation queries the response was YES. [2022-11-25 18:03:16,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55951 conditions, 28267 events. 18145/28267 cut-off events. For 3872/3872 co-relation queries the response was YES. Maximal size of possible extension queue 1442. Compared 222818 event pairs, 1131 based on Foata normal form. 518/22759 useless extension candidates. Maximal degree in co-relation 55936. Up to 15904 conditions per place. [2022-11-25 18:03:16,907 INFO L137 encePairwiseOnDemand]: 476/480 looper letters, 93 selfloop transitions, 4 changer transitions 0/120 dead transitions. [2022-11-25 18:03:16,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 120 transitions, 520 flow [2022-11-25 18:03:16,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:03:16,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:03:16,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1129 transitions. [2022-11-25 18:03:16,911 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47041666666666665 [2022-11-25 18:03:16,911 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1129 transitions. [2022-11-25 18:03:16,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1129 transitions. [2022-11-25 18:03:16,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:03:16,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1129 transitions. [2022-11-25 18:03:16,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.8) internal successors, (1129), 5 states have internal predecessors, (1129), 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 18:03:16,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 480.0) internal successors, (2880), 6 states have internal predecessors, (2880), 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 18:03:16,921 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 480.0) internal successors, (2880), 6 states have internal predecessors, (2880), 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 18:03:16,922 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 157 flow. Second operand 5 states and 1129 transitions. [2022-11-25 18:03:16,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 120 transitions, 520 flow [2022-11-25 18:03:16,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 120 transitions, 512 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:03:16,966 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 154 flow [2022-11-25 18:03:16,966 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2022-11-25 18:03:16,967 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2022-11-25 18:03:16,967 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 154 flow [2022-11-25 18:03:16,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 207.4) internal successors, (1037), 5 states have internal predecessors, (1037), 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 18:03:16,968 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:03:16,968 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:03:16,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:03:17,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-25 18:03:17,174 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2022-11-25 18:03:17,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:03:17,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1010092420, now seen corresponding path program 1 times [2022-11-25 18:03:17,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:03:17,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817016093] [2022-11-25 18:03:17,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:03:17,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:03:17,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:03:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:03:17,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:03:17,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817016093] [2022-11-25 18:03:17,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817016093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:03:17,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025946593] [2022-11-25 18:03:17,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:03:17,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:03:17,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:03:17,369 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:03:17,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 18:03:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:03:17,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 18:03:17,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:03:17,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:03:17,514 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 18:03:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:03:17,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:03:17,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025946593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:03:17,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:03:17,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2022-11-25 18:03:17,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361772816] [2022-11-25 18:03:17,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:03:17,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:03:17,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:03:17,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:03:17,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:03:17,759 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 480 [2022-11-25 18:03:17,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 208.5) internal successors, (834), 4 states have internal predecessors, (834), 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 18:03:17,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:03:17,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 480 [2022-11-25 18:03:17,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:03:22,954 INFO L130 PetriNetUnfolder]: 29745/45325 cut-off events. [2022-11-25 18:03:22,954 INFO L131 PetriNetUnfolder]: For 17500/17500 co-relation queries the response was YES. [2022-11-25 18:03:23,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95094 conditions, 45325 events. 29745/45325 cut-off events. For 17500/17500 co-relation queries the response was YES. Maximal size of possible extension queue 2223. Compared 354897 event pairs, 14703 based on Foata normal form. 0/35714 useless extension candidates. Maximal degree in co-relation 95080. Up to 22205 conditions per place. [2022-11-25 18:03:23,254 INFO L137 encePairwiseOnDemand]: 476/480 looper letters, 54 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2022-11-25 18:03:23,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 353 flow [2022-11-25 18:03:23,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:03:23,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:03:23,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 882 transitions. [2022-11-25 18:03:23,257 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.459375 [2022-11-25 18:03:23,257 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 882 transitions. [2022-11-25 18:03:23,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 882 transitions. [2022-11-25 18:03:23,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:03:23,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 882 transitions. [2022-11-25 18:03:23,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 220.5) internal successors, (882), 4 states have internal predecessors, (882), 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 18:03:23,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 480.0) internal successors, (2400), 5 states have internal predecessors, (2400), 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 18:03:23,263 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 480.0) internal successors, (2400), 5 states have internal predecessors, (2400), 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 18:03:23,263 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 154 flow. Second operand 4 states and 882 transitions. [2022-11-25 18:03:23,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 353 flow [2022-11-25 18:03:23,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 80 transitions, 331 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-25 18:03:23,269 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 157 flow [2022-11-25 18:03:23,269 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2022-11-25 18:03:23,270 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, 3 predicate places. [2022-11-25 18:03:23,270 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 157 flow [2022-11-25 18:03:23,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 208.5) internal successors, (834), 4 states have internal predecessors, (834), 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 18:03:23,270 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:03:23,271 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:03:23,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 18:03:23,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:03:23,477 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2022-11-25 18:03:23,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:03:23,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1248087893, now seen corresponding path program 1 times [2022-11-25 18:03:23,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:03:23,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275909699] [2022-11-25 18:03:23,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:03:23,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:03:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:03:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:03:23,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:03:23,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275909699] [2022-11-25 18:03:23,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275909699] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:03:23,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546050356] [2022-11-25 18:03:23,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:03:23,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:03:23,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:03:23,695 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:03:23,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 18:03:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:03:23,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 18:03:23,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:03:23,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:03:23,823 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 18:03:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:03:23,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:03:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:03:24,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546050356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:03:24,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:03:24,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-25 18:03:24,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131232238] [2022-11-25 18:03:24,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:03:24,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:03:24,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:03:24,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:03:24,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:03:24,654 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 480 [2022-11-25 18:03:24,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 157 flow. Second operand has 11 states, 11 states have (on average 203.9090909090909) internal successors, (2243), 11 states have internal predecessors, (2243), 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 18:03:24,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:03:24,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 480 [2022-11-25 18:03:24,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:03:28,950 INFO L130 PetriNetUnfolder]: 23705/35839 cut-off events. [2022-11-25 18:03:28,950 INFO L131 PetriNetUnfolder]: For 9659/9659 co-relation queries the response was YES. [2022-11-25 18:03:29,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77088 conditions, 35839 events. 23705/35839 cut-off events. For 9659/9659 co-relation queries the response was YES. Maximal size of possible extension queue 1682. Compared 269933 event pairs, 10067 based on Foata normal form. 602/30346 useless extension candidates. Maximal degree in co-relation 77072. Up to 15907 conditions per place. [2022-11-25 18:03:29,212 INFO L137 encePairwiseOnDemand]: 475/480 looper letters, 76 selfloop transitions, 4 changer transitions 0/103 dead transitions. [2022-11-25 18:03:29,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 103 transitions, 459 flow [2022-11-25 18:03:29,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:03:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:03:29,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1086 transitions. [2022-11-25 18:03:29,215 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4525 [2022-11-25 18:03:29,215 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1086 transitions. [2022-11-25 18:03:29,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1086 transitions. [2022-11-25 18:03:29,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:03:29,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1086 transitions. [2022-11-25 18:03:29,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 217.2) internal successors, (1086), 5 states have internal predecessors, (1086), 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 18:03:29,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 480.0) internal successors, (2880), 6 states have internal predecessors, (2880), 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 18:03:29,221 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 480.0) internal successors, (2880), 6 states have internal predecessors, (2880), 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 18:03:29,221 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 157 flow. Second operand 5 states and 1086 transitions. [2022-11-25 18:03:29,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 103 transitions, 459 flow [2022-11-25 18:03:29,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 103 transitions, 453 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 18:03:29,232 INFO L231 Difference]: Finished difference. Result has 69 places, 56 transitions, 173 flow [2022-11-25 18:03:29,232 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=69, PETRI_TRANSITIONS=56} [2022-11-25 18:03:29,233 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, 7 predicate places. [2022-11-25 18:03:29,233 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 56 transitions, 173 flow [2022-11-25 18:03:29,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 203.9090909090909) internal successors, (2243), 11 states have internal predecessors, (2243), 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 18:03:29,233 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:03:29,234 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:03:29,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-25 18:03:29,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d3f7b7-8842-4f6c-be19-740800da108b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-25 18:03:29,448 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2022-11-25 18:03:29,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:03:29,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1958187329, now seen corresponding path program 1 times [2022-11-25 18:03:29,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:03:29,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943951675] [2022-11-25 18:03:29,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:03:29,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:03:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:03:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:03:29,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:03:29,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943951675] [2022-11-25 18:03:29,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943951675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:03:29,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:03:29,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:03:29,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296705521] [2022-11-25 18:03:29,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:03:29,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:03:29,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:03:29,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:03:29,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:03:29,536 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 480 [2022-11-25 18:03:29,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 56 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 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 18:03:29,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:03:29,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 480 [2022-11-25 18:03:29,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand