./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8 --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 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df --- 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-2329fc7 [2022-12-13 19:21:05,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:21:05,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:21:05,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:21:05,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:21:05,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:21:05,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:21:05,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:21:05,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:21:05,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:21:05,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:21:05,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:21:05,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:21:05,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:21:05,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:21:05,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:21:05,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:21:05,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:21:05,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:21:05,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:21:05,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:21:05,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:21:05,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:21:05,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:21:05,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:21:05,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:21:05,445 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:21:05,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:21:05,446 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:21:05,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:21:05,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:21:05,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:21:05,447 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:21:05,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:21:05,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:21:05,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:21:05,449 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:21:05,449 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:21:05,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:21:05,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:21:05,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:21:05,451 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 19:21:05,472 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:21:05,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:21:05,472 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:21:05,473 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:21:05,473 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:21:05,473 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:21:05,474 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:21:05,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:21:05,474 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:21:05,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:21:05,485 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:21:05,485 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 19:21:05,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:21:05,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:21:05,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:21:05,486 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 19:21:05,486 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 19:21:05,486 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 19:21:05,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:21:05,486 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 19:21:05,486 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:21:05,486 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:21:05,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:21:05,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:21:05,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:21:05,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:21:05,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:21:05,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:21:05,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:21:05,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:21:05,487 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:21:05,487 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:21:05,488 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:21:05,488 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:21:05,488 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_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df [2022-12-13 19:21:05,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:21:05,690 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:21:05,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:21:05,692 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:21:05,693 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:21:05,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2022-12-13 19:21:08,245 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:21:08,456 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:21:08,456 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2022-12-13 19:21:08,465 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/data/11e7a2144/1d872a7997244483a23b448d36f27845/FLAG1dd808ef1 [2022-12-13 19:21:08,804 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/data/11e7a2144/1d872a7997244483a23b448d36f27845 [2022-12-13 19:21:08,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:21:08,807 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:21:08,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:21:08,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:21:08,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:21:08,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:21:08" (1/1) ... [2022-12-13 19:21:08,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14c9e6b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:21:08, skipping insertion in model container [2022-12-13 19:21:08,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:21:08" (1/1) ... [2022-12-13 19:21:08,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:21:08,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:21:09,084 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_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i[41323,41336] [2022-12-13 19:21:09,104 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:21:09,115 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:21:09,140 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_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i[41323,41336] [2022-12-13 19:21:09,149 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:21:09,180 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:21:09,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:21:09 WrapperNode [2022-12-13 19:21:09,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:21:09,181 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:21:09,181 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:21:09,181 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:21:09,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:21:09" (1/1) ... [2022-12-13 19:21:09,197 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:21:09" (1/1) ... [2022-12-13 19:21:09,214 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 186 [2022-12-13 19:21:09,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:21:09,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:21:09,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:21:09,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:21:09,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:21:09" (1/1) ... [2022-12-13 19:21:09,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:21:09" (1/1) ... [2022-12-13 19:21:09,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:21:09" (1/1) ... [2022-12-13 19:21:09,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:21:09" (1/1) ... [2022-12-13 19:21:09,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:21:09" (1/1) ... [2022-12-13 19:21:09,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:21:09" (1/1) ... [2022-12-13 19:21:09,234 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:21:09" (1/1) ... [2022-12-13 19:21:09,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:21:09" (1/1) ... [2022-12-13 19:21:09,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:21:09,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:21:09,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:21:09,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:21:09,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:21:09" (1/1) ... [2022-12-13 19:21:09,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:21:09,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:09,260 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:21:09,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:21:09,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:21:09,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:21:09,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 19:21:09,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 19:21:09,286 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 19:21:09,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:21:09,286 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 19:21:09,286 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 19:21:09,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 19:21:09,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:21:09,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:21:09,288 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 19:21:09,397 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:21:09,399 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:21:09,691 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:21:09,699 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:21:09,699 INFO L300 CfgBuilder]: Removed 23 assume(true) statements. [2022-12-13 19:21:09,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:21:09 BoogieIcfgContainer [2022-12-13 19:21:09,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:21:09,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:21:09,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:21:09,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:21:09,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:21:08" (1/3) ... [2022-12-13 19:21:09,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a83d8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:21:09, skipping insertion in model container [2022-12-13 19:21:09,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:21:09" (2/3) ... [2022-12-13 19:21:09,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a83d8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:21:09, skipping insertion in model container [2022-12-13 19:21:09,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:21:09" (3/3) ... [2022-12-13 19:21:09,710 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2022-12-13 19:21:09,728 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:21:09,728 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2022-12-13 19:21:09,728 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 19:21:09,827 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 19:21:09,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 225 transitions, 458 flow [2022-12-13 19:21:09,969 INFO L130 PetriNetUnfolder]: 45/314 cut-off events. [2022-12-13 19:21:09,970 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-12-13 19:21:09,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 314 events. 45/314 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1213 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 174. Up to 8 conditions per place. [2022-12-13 19:21:09,978 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 225 transitions, 458 flow [2022-12-13 19:21:09,985 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 225 transitions, 458 flow [2022-12-13 19:21:09,989 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:21:10,000 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 225 transitions, 458 flow [2022-12-13 19:21:10,003 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 225 transitions, 458 flow [2022-12-13 19:21:10,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 225 transitions, 458 flow [2022-12-13 19:21:10,062 INFO L130 PetriNetUnfolder]: 45/314 cut-off events. [2022-12-13 19:21:10,062 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-12-13 19:21:10,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 314 events. 45/314 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1213 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 174. Up to 8 conditions per place. [2022-12-13 19:21:10,072 INFO L119 LiptonReduction]: Number of co-enabled transitions 15200 [2022-12-13 19:21:13,007 INFO L134 LiptonReduction]: Checked pairs total: 29883 [2022-12-13 19:21:13,007 INFO L136 LiptonReduction]: Total number of compositions: 209 [2022-12-13 19:21:13,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:21:13,021 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;@5b1f3e2e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:21:13,022 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-12-13 19:21:13,023 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2022-12-13 19:21:13,023 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:21:13,024 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:13,024 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 19:21:13,024 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 19:21:13,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:13,028 INFO L85 PathProgramCache]: Analyzing trace with hash 885417, now seen corresponding path program 1 times [2022-12-13 19:21:13,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:13,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569768282] [2022-12-13 19:21:13,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:13,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:21:13,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:13,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569768282] [2022-12-13 19:21:13,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569768282] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:13,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:21:13,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:21:13,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546073082] [2022-12-13 19:21:13,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:13,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:21:13,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:13,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:21:13,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:21:13,217 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 434 [2022-12-13 19:21:13,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 93 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:13,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:13,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 434 [2022-12-13 19:21:13,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:13,424 INFO L130 PetriNetUnfolder]: 601/1386 cut-off events. [2022-12-13 19:21:13,424 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 19:21:13,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2579 conditions, 1386 events. 601/1386 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8901 event pairs, 551 based on Foata normal form. 102/1059 useless extension candidates. Maximal degree in co-relation 2495. Up to 1185 conditions per place. [2022-12-13 19:21:13,431 INFO L137 encePairwiseOnDemand]: 404/434 looper letters, 53 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2022-12-13 19:21:13,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 67 transitions, 252 flow [2022-12-13 19:21:13,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:21:13,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:21:13,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 653 transitions. [2022-12-13 19:21:13,442 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5015360983102919 [2022-12-13 19:21:13,442 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 653 transitions. [2022-12-13 19:21:13,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 653 transitions. [2022-12-13 19:21:13,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:13,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 653 transitions. [2022-12-13 19:21:13,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 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) [2022-12-13 19:21:13,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:13,457 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:13,459 INFO L175 Difference]: Start difference. First operand has 71 places, 93 transitions, 194 flow. Second operand 3 states and 653 transitions. [2022-12-13 19:21:13,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 67 transitions, 252 flow [2022-12-13 19:21:13,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:21:13,463 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 152 flow [2022-12-13 19:21:13,465 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2022-12-13 19:21:13,468 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2022-12-13 19:21:13,468 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 152 flow [2022-12-13 19:21:13,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:13,469 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:13,469 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 19:21:13,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 19:21:13,469 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 19:21:13,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:13,470 INFO L85 PathProgramCache]: Analyzing trace with hash 27437849, now seen corresponding path program 1 times [2022-12-13 19:21:13,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:13,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909930731] [2022-12-13 19:21:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:13,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:21:13,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:13,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909930731] [2022-12-13 19:21:13,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909930731] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:13,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718049904] [2022-12-13 19:21:13,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:13,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:13,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:13,566 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:13,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 19:21:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:13,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:21:13,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:21:13,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:21:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:21:13,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718049904] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:21:13,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:21:13,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 19:21:13,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667767462] [2022-12-13 19:21:13,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:21:13,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:21:13,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:13,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:21:13,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:21:13,702 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 434 [2022-12-13 19:21:13,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 190.28571428571428) internal successors, (1332), 7 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:13,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:13,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 434 [2022-12-13 19:21:13,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:13,928 INFO L130 PetriNetUnfolder]: 601/1389 cut-off events. [2022-12-13 19:21:13,928 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 19:21:13,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2595 conditions, 1389 events. 601/1389 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8903 event pairs, 551 based on Foata normal form. 0/960 useless extension candidates. Maximal degree in co-relation 2583. Up to 1185 conditions per place. [2022-12-13 19:21:13,933 INFO L137 encePairwiseOnDemand]: 431/434 looper letters, 53 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2022-12-13 19:21:13,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 70 transitions, 280 flow [2022-12-13 19:21:13,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:21:13,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:21:13,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1195 transitions. [2022-12-13 19:21:13,939 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4589093701996928 [2022-12-13 19:21:13,939 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1195 transitions. [2022-12-13 19:21:13,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1195 transitions. [2022-12-13 19:21:13,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:13,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1195 transitions. [2022-12-13 19:21:13,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.16666666666666) internal successors, (1195), 6 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:13,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:13,946 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:13,946 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 152 flow. Second operand 6 states and 1195 transitions. [2022-12-13 19:21:13,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 70 transitions, 280 flow [2022-12-13 19:21:13,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 70 transitions, 276 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 19:21:13,948 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 184 flow [2022-12-13 19:21:13,948 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2022-12-13 19:21:13,948 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2022-12-13 19:21:13,949 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 184 flow [2022-12-13 19:21:13,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 190.28571428571428) internal successors, (1332), 7 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:13,949 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:13,949 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 19:21:13,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:21:14,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:14,150 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 19:21:14,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:14,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1347104299, now seen corresponding path program 2 times [2022-12-13 19:21:14,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:14,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030948249] [2022-12-13 19:21:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:14,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:21:14,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:14,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030948249] [2022-12-13 19:21:14,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030948249] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:14,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889572133] [2022-12-13 19:21:14,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:21:14,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:14,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:14,246 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:14,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 19:21:14,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:21:14,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:21:14,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:21:14,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:14,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 19:21:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 19:21:14,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:21:14,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889572133] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:14,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:21:14,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2022-12-13 19:21:14,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686793444] [2022-12-13 19:21:14,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:14,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:21:14,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:14,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:21:14,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:21:14,395 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 434 [2022-12-13 19:21:14,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:14,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:14,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 434 [2022-12-13 19:21:14,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:14,587 INFO L130 PetriNetUnfolder]: 573/1274 cut-off events. [2022-12-13 19:21:14,587 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 19:21:14,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2490 conditions, 1274 events. 573/1274 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8112 event pairs, 0 based on Foata normal form. 0/859 useless extension candidates. Maximal degree in co-relation 2456. Up to 1145 conditions per place. [2022-12-13 19:21:14,592 INFO L137 encePairwiseOnDemand]: 430/434 looper letters, 77 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2022-12-13 19:21:14,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 91 transitions, 384 flow [2022-12-13 19:21:14,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:21:14,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:21:14,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2022-12-13 19:21:14,593 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4946236559139785 [2022-12-13 19:21:14,593 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2022-12-13 19:21:14,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2022-12-13 19:21:14,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:14,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2022-12-13 19:21:14,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:14,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:14,597 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:14,597 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 184 flow. Second operand 3 states and 644 transitions. [2022-12-13 19:21:14,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 91 transitions, 384 flow [2022-12-13 19:21:14,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 370 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 19:21:14,599 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 180 flow [2022-12-13 19:21:14,599 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2022-12-13 19:21:14,599 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 6 predicate places. [2022-12-13 19:21:14,599 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 180 flow [2022-12-13 19:21:14,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:14,600 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:14,600 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 19:21:14,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 19:21:14,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:14,801 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 19:21:14,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:14,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1347104297, now seen corresponding path program 1 times [2022-12-13 19:21:14,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:14,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911509912] [2022-12-13 19:21:14,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:14,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 19:21:14,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:14,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911509912] [2022-12-13 19:21:14,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911509912] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:14,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:21:14,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:21:14,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236842292] [2022-12-13 19:21:14,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:14,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:21:14,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:14,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:21:14,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:21:14,924 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 434 [2022-12-13 19:21:14,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:14,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:14,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 434 [2022-12-13 19:21:14,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:15,092 INFO L130 PetriNetUnfolder]: 558/1230 cut-off events. [2022-12-13 19:21:15,092 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-12-13 19:21:15,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2424 conditions, 1230 events. 558/1230 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7437 event pairs, 475 based on Foata normal form. 0/878 useless extension candidates. Maximal degree in co-relation 2395. Up to 1001 conditions per place. [2022-12-13 19:21:15,096 INFO L137 encePairwiseOnDemand]: 429/434 looper letters, 72 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2022-12-13 19:21:15,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 87 transitions, 364 flow [2022-12-13 19:21:15,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:21:15,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:21:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2022-12-13 19:21:15,098 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4846390168970814 [2022-12-13 19:21:15,098 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2022-12-13 19:21:15,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2022-12-13 19:21:15,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:15,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2022-12-13 19:21:15,099 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) [2022-12-13 19:21:15,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:15,101 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:15,101 INFO L175 Difference]: Start difference. First operand has 77 places, 70 transitions, 180 flow. Second operand 3 states and 631 transitions. [2022-12-13 19:21:15,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 87 transitions, 364 flow [2022-12-13 19:21:15,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 87 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:21:15,103 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 178 flow [2022-12-13 19:21:15,103 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2022-12-13 19:21:15,103 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2022-12-13 19:21:15,104 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 178 flow [2022-12-13 19:21:15,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:15,104 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:15,104 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 19:21:15,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 19:21:15,104 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 19:21:15,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:15,105 INFO L85 PathProgramCache]: Analyzing trace with hash -589616986, now seen corresponding path program 1 times [2022-12-13 19:21:15,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:15,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806998460] [2022-12-13 19:21:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:15,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:21:15,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:15,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806998460] [2022-12-13 19:21:15,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806998460] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:15,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415372167] [2022-12-13 19:21:15,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:15,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:15,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:15,168 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:15,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 19:21:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:15,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 19:21:15,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:21:15,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:21:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:21:15,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415372167] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:21:15,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:21:15,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 19:21:15,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28526294] [2022-12-13 19:21:15,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:21:15,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 19:21:15,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:15,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 19:21:15,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 19:21:15,314 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 434 [2022-12-13 19:21:15,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 178 flow. Second operand has 13 states, 13 states have (on average 190.3846153846154) internal successors, (2475), 13 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:15,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:15,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 434 [2022-12-13 19:21:15,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:15,526 INFO L130 PetriNetUnfolder]: 560/1240 cut-off events. [2022-12-13 19:21:15,527 INFO L131 PetriNetUnfolder]: For 100/100 co-relation queries the response was YES. [2022-12-13 19:21:15,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2474 conditions, 1240 events. 560/1240 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7454 event pairs, 513 based on Foata normal form. 6/915 useless extension candidates. Maximal degree in co-relation 2421. Up to 1084 conditions per place. [2022-12-13 19:21:15,531 INFO L137 encePairwiseOnDemand]: 431/434 looper letters, 51 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2022-12-13 19:21:15,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 74 transitions, 338 flow [2022-12-13 19:21:15,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 19:21:15,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 19:21:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2336 transitions. [2022-12-13 19:21:15,534 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4485407066052227 [2022-12-13 19:21:15,534 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2336 transitions. [2022-12-13 19:21:15,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2336 transitions. [2022-12-13 19:21:15,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:15,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2336 transitions. [2022-12-13 19:21:15,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 194.66666666666666) internal successors, (2336), 12 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:15,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 434.0) internal successors, (5642), 13 states have internal predecessors, (5642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:15,543 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 434.0) internal successors, (5642), 13 states have internal predecessors, (5642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:15,543 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 178 flow. Second operand 12 states and 2336 transitions. [2022-12-13 19:21:15,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 74 transitions, 338 flow [2022-12-13 19:21:15,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 74 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:21:15,545 INFO L231 Difference]: Finished difference. Result has 90 places, 74 transitions, 256 flow [2022-12-13 19:21:15,546 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=256, PETRI_PLACES=90, PETRI_TRANSITIONS=74} [2022-12-13 19:21:15,546 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 19 predicate places. [2022-12-13 19:21:15,546 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 74 transitions, 256 flow [2022-12-13 19:21:15,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 190.3846153846154) internal successors, (2475), 13 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:15,547 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:15,547 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-13 19:21:15,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 19:21:15,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:15,748 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 19:21:15,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:15,748 INFO L85 PathProgramCache]: Analyzing trace with hash -2039847066, now seen corresponding path program 2 times [2022-12-13 19:21:15,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:15,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716031163] [2022-12-13 19:21:15,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:15,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:21:15,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:15,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716031163] [2022-12-13 19:21:15,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716031163] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:15,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721508912] [2022-12-13 19:21:15,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:21:15,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:15,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:15,886 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:15,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 19:21:15,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:21:15,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:21:15,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 19:21:15,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:15,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 19:21:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:21:15,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:21:15,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721508912] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:15,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:21:15,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 19:21:15,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815610378] [2022-12-13 19:21:15,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:15,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:21:15,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:15,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:21:15,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:21:16,070 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 434 [2022-12-13 19:21:16,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 74 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 189.75) internal successors, (759), 4 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:16,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:16,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 434 [2022-12-13 19:21:16,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:16,283 INFO L130 PetriNetUnfolder]: 539/1212 cut-off events. [2022-12-13 19:21:16,283 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-13 19:21:16,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2382 conditions, 1212 events. 539/1212 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7405 event pairs, 230 based on Foata normal form. 0/890 useless extension candidates. Maximal degree in co-relation 2305. Up to 940 conditions per place. [2022-12-13 19:21:16,287 INFO L137 encePairwiseOnDemand]: 429/434 looper letters, 96 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2022-12-13 19:21:16,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 112 transitions, 530 flow [2022-12-13 19:21:16,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:21:16,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:21:16,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 843 transitions. [2022-12-13 19:21:16,289 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48559907834101385 [2022-12-13 19:21:16,289 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 843 transitions. [2022-12-13 19:21:16,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 843 transitions. [2022-12-13 19:21:16,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:16,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 843 transitions. [2022-12-13 19:21:16,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 210.75) internal successors, (843), 4 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:16,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 434.0) internal successors, (2170), 5 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:16,292 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 434.0) internal successors, (2170), 5 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:16,292 INFO L175 Difference]: Start difference. First operand has 90 places, 74 transitions, 256 flow. Second operand 4 states and 843 transitions. [2022-12-13 19:21:16,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 112 transitions, 530 flow [2022-12-13 19:21:16,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 112 transitions, 482 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-12-13 19:21:16,297 INFO L231 Difference]: Finished difference. Result has 87 places, 73 transitions, 212 flow [2022-12-13 19:21:16,297 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=87, PETRI_TRANSITIONS=73} [2022-12-13 19:21:16,298 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 16 predicate places. [2022-12-13 19:21:16,298 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 73 transitions, 212 flow [2022-12-13 19:21:16,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 189.75) internal successors, (759), 4 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:16,298 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:16,298 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:21:16,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 19:21:16,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:16,500 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 19:21:16,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:16,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1189280382, now seen corresponding path program 1 times [2022-12-13 19:21:16,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:16,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99177232] [2022-12-13 19:21:16,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:16,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:21:16,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:16,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99177232] [2022-12-13 19:21:16,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99177232] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:16,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:21:16,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:21:16,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686859974] [2022-12-13 19:21:16,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:16,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:21:16,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:16,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:21:16,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:21:16,984 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 434 [2022-12-13 19:21:16,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 73 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 167.33333333333334) internal successors, (1004), 6 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:16,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:16,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 434 [2022-12-13 19:21:16,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:17,235 INFO L130 PetriNetUnfolder]: 392/845 cut-off events. [2022-12-13 19:21:17,235 INFO L131 PetriNetUnfolder]: For 116/116 co-relation queries the response was YES. [2022-12-13 19:21:17,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1772 conditions, 845 events. 392/845 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4790 event pairs, 0 based on Foata normal form. 0/708 useless extension candidates. Maximal degree in co-relation 1719. Up to 692 conditions per place. [2022-12-13 19:21:17,238 INFO L137 encePairwiseOnDemand]: 418/434 looper letters, 86 selfloop transitions, 8 changer transitions 0/101 dead transitions. [2022-12-13 19:21:17,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 101 transitions, 465 flow [2022-12-13 19:21:17,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:21:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:21:17,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1102 transitions. [2022-12-13 19:21:17,240 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42319508448540705 [2022-12-13 19:21:17,240 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1102 transitions. [2022-12-13 19:21:17,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1102 transitions. [2022-12-13 19:21:17,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:17,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1102 transitions. [2022-12-13 19:21:17,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 183.66666666666666) internal successors, (1102), 6 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:17,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:17,244 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:17,244 INFO L175 Difference]: Start difference. First operand has 87 places, 73 transitions, 212 flow. Second operand 6 states and 1102 transitions. [2022-12-13 19:21:17,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 101 transitions, 465 flow [2022-12-13 19:21:17,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 451 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 19:21:17,246 INFO L231 Difference]: Finished difference. Result has 78 places, 65 transitions, 204 flow [2022-12-13 19:21:17,247 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=204, PETRI_PLACES=78, PETRI_TRANSITIONS=65} [2022-12-13 19:21:17,247 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 7 predicate places. [2022-12-13 19:21:17,247 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 65 transitions, 204 flow [2022-12-13 19:21:17,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 167.33333333333334) internal successors, (1004), 6 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:17,248 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:17,248 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2022-12-13 19:21:17,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 19:21:17,248 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 19:21:17,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:17,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1189251016, now seen corresponding path program 1 times [2022-12-13 19:21:17,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:17,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189780263] [2022-12-13 19:21:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:17,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:21:17,262 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 19:21:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:21:17,283 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 19:21:17,283 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 19:21:17,284 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2022-12-13 19:21:17,285 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2022-12-13 19:21:17,285 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2022-12-13 19:21:17,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2022-12-13 19:21:17,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2022-12-13 19:21:17,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 39 remaining) [2022-12-13 19:21:17,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2022-12-13 19:21:17,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2022-12-13 19:21:17,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2022-12-13 19:21:17,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (29 of 39 remaining) [2022-12-13 19:21:17,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2022-12-13 19:21:17,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2022-12-13 19:21:17,287 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2022-12-13 19:21:17,287 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2022-12-13 19:21:17,287 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2022-12-13 19:21:17,287 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2022-12-13 19:21:17,287 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2022-12-13 19:21:17,287 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2022-12-13 19:21:17,287 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2022-12-13 19:21:17,288 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2022-12-13 19:21:17,288 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2022-12-13 19:21:17,288 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2022-12-13 19:21:17,288 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2022-12-13 19:21:17,288 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2022-12-13 19:21:17,288 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2022-12-13 19:21:17,288 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2022-12-13 19:21:17,288 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2022-12-13 19:21:17,288 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2022-12-13 19:21:17,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2022-12-13 19:21:17,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2022-12-13 19:21:17,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2022-12-13 19:21:17,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2022-12-13 19:21:17,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2022-12-13 19:21:17,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2022-12-13 19:21:17,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2022-12-13 19:21:17,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2022-12-13 19:21:17,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2022-12-13 19:21:17,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2022-12-13 19:21:17,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2022-12-13 19:21:17,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 19:21:17,290 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2022-12-13 19:21:17,292 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 19:21:17,292 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 19:21:17,321 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 19:21:17,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 307 transitions, 632 flow [2022-12-13 19:21:17,365 INFO L130 PetriNetUnfolder]: 75/515 cut-off events. [2022-12-13 19:21:17,365 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-12-13 19:21:17,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 515 events. 75/515 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2350 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 316. Up to 12 conditions per place. [2022-12-13 19:21:17,367 INFO L82 GeneralOperation]: Start removeDead. Operand has 267 places, 307 transitions, 632 flow [2022-12-13 19:21:17,371 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 267 places, 307 transitions, 632 flow [2022-12-13 19:21:17,371 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:21:17,372 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 267 places, 307 transitions, 632 flow [2022-12-13 19:21:17,372 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 267 places, 307 transitions, 632 flow [2022-12-13 19:21:17,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 307 transitions, 632 flow [2022-12-13 19:21:17,417 INFO L130 PetriNetUnfolder]: 75/515 cut-off events. [2022-12-13 19:21:17,417 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-12-13 19:21:17,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 515 events. 75/515 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2350 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 316. Up to 12 conditions per place. [2022-12-13 19:21:17,436 INFO L119 LiptonReduction]: Number of co-enabled transitions 44960 [2022-12-13 19:21:21,112 INFO L134 LiptonReduction]: Checked pairs total: 94232 [2022-12-13 19:21:21,112 INFO L136 LiptonReduction]: Total number of compositions: 283 [2022-12-13 19:21:21,113 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:21:21,113 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;@5b1f3e2e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:21:21,113 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2022-12-13 19:21:21,114 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2022-12-13 19:21:21,114 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:21:21,114 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:21,114 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 19:21:21,114 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 19:21:21,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:21,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1552858, now seen corresponding path program 1 times [2022-12-13 19:21:21,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:21,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786937509] [2022-12-13 19:21:21,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:21,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:21:21,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:21,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786937509] [2022-12-13 19:21:21,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786937509] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:21,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:21:21,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:21:21,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908181438] [2022-12-13 19:21:21,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:21,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:21:21,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:21,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:21:21,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:21:21,138 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 590 [2022-12-13 19:21:21,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 138 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:21,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:21,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 590 [2022-12-13 19:21:21,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:23,815 INFO L130 PetriNetUnfolder]: 25637/43483 cut-off events. [2022-12-13 19:21:23,815 INFO L131 PetriNetUnfolder]: For 149/149 co-relation queries the response was YES. [2022-12-13 19:21:23,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81458 conditions, 43483 events. 25637/43483 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 1975. Compared 385816 event pairs, 24304 based on Foata normal form. 4057/34593 useless extension candidates. Maximal degree in co-relation 33054. Up to 37841 conditions per place. [2022-12-13 19:21:24,012 INFO L137 encePairwiseOnDemand]: 547/590 looper letters, 75 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2022-12-13 19:21:24,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 98 transitions, 368 flow [2022-12-13 19:21:24,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:21:24,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:21:24,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 889 transitions. [2022-12-13 19:21:24,014 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5022598870056497 [2022-12-13 19:21:24,014 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 889 transitions. [2022-12-13 19:21:24,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 889 transitions. [2022-12-13 19:21:24,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:24,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 889 transitions. [2022-12-13 19:21:24,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.3333333333333) internal successors, (889), 3 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:24,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:24,019 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:24,019 INFO L175 Difference]: Start difference. First operand has 105 places, 138 transitions, 294 flow. Second operand 3 states and 889 transitions. [2022-12-13 19:21:24,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 98 transitions, 368 flow [2022-12-13 19:21:24,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 98 transitions, 368 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:21:24,021 INFO L231 Difference]: Finished difference. Result has 99 places, 98 transitions, 224 flow [2022-12-13 19:21:24,021 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=99, PETRI_TRANSITIONS=98} [2022-12-13 19:21:24,022 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -6 predicate places. [2022-12-13 19:21:24,022 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 98 transitions, 224 flow [2022-12-13 19:21:24,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:24,022 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:24,022 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 19:21:24,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 19:21:24,023 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 19:21:24,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:24,023 INFO L85 PathProgramCache]: Analyzing trace with hash 48098894, now seen corresponding path program 1 times [2022-12-13 19:21:24,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:24,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980075865] [2022-12-13 19:21:24,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:24,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:21:24,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:24,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980075865] [2022-12-13 19:21:24,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980075865] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:24,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083256657] [2022-12-13 19:21:24,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:24,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:24,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:24,049 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:24,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 19:21:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:24,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:21:24,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:21:24,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:21:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:21:24,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083256657] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:21:24,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:21:24,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 19:21:24,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417657083] [2022-12-13 19:21:24,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:21:24,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:21:24,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:24,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:21:24,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:21:24,135 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 590 [2022-12-13 19:21:24,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 98 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 257.2857142857143) internal successors, (1801), 7 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:24,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:24,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 590 [2022-12-13 19:21:24,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:27,021 INFO L130 PetriNetUnfolder]: 25637/43486 cut-off events. [2022-12-13 19:21:27,021 INFO L131 PetriNetUnfolder]: For 149/149 co-relation queries the response was YES. [2022-12-13 19:21:27,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81474 conditions, 43486 events. 25637/43486 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 1975. Compared 385769 event pairs, 24304 based on Foata normal form. 0/30539 useless extension candidates. Maximal degree in co-relation 81461. Up to 37841 conditions per place. [2022-12-13 19:21:27,211 INFO L137 encePairwiseOnDemand]: 587/590 looper letters, 75 selfloop transitions, 5 changer transitions 0/101 dead transitions. [2022-12-13 19:21:27,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 101 transitions, 396 flow [2022-12-13 19:21:27,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:21:27,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:21:27,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1619 transitions. [2022-12-13 19:21:27,215 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45734463276836157 [2022-12-13 19:21:27,215 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1619 transitions. [2022-12-13 19:21:27,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1619 transitions. [2022-12-13 19:21:27,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:27,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1619 transitions. [2022-12-13 19:21:27,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 269.8333333333333) internal successors, (1619), 6 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:27,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 590.0) internal successors, (4130), 7 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:27,224 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 590.0) internal successors, (4130), 7 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:27,224 INFO L175 Difference]: Start difference. First operand has 99 places, 98 transitions, 224 flow. Second operand 6 states and 1619 transitions. [2022-12-13 19:21:27,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 101 transitions, 396 flow [2022-12-13 19:21:27,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 101 transitions, 392 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 19:21:27,226 INFO L231 Difference]: Finished difference. Result has 106 places, 101 transitions, 256 flow [2022-12-13 19:21:27,226 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=106, PETRI_TRANSITIONS=101} [2022-12-13 19:21:27,226 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, 1 predicate places. [2022-12-13 19:21:27,227 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 101 transitions, 256 flow [2022-12-13 19:21:27,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 257.2857142857143) internal successors, (1801), 7 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:27,227 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:27,227 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 19:21:27,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 19:21:27,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 19:21:27,429 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 19:21:27,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:27,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1644382565, now seen corresponding path program 2 times [2022-12-13 19:21:27,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:27,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091039145] [2022-12-13 19:21:27,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:27,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:21:27,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:27,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091039145] [2022-12-13 19:21:27,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091039145] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:27,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322053183] [2022-12-13 19:21:27,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:21:27,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:27,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:27,512 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:27,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 19:21:27,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:21:27,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:21:27,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:21:27,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:27,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 19:21:27,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 19:21:27,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:21:27,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322053183] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:27,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:21:27,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2022-12-13 19:21:27,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259675866] [2022-12-13 19:21:27,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:27,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:21:27,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:27,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:21:27,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:21:27,675 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 590 [2022-12-13 19:21:27,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 101 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 257.3333333333333) internal successors, (772), 3 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:27,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:27,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 590 [2022-12-13 19:21:27,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:30,544 INFO L130 PetriNetUnfolder]: 25336/42591 cut-off events. [2022-12-13 19:21:30,545 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2022-12-13 19:21:30,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80585 conditions, 42591 events. 25336/42591 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 1865. Compared 372863 event pairs, 11704 based on Foata normal form. 0/29675 useless extension candidates. Maximal degree in co-relation 80550. Up to 37794 conditions per place. [2022-12-13 19:21:30,714 INFO L137 encePairwiseOnDemand]: 586/590 looper letters, 101 selfloop transitions, 2 changer transitions 0/124 dead transitions. [2022-12-13 19:21:30,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 124 transitions, 508 flow [2022-12-13 19:21:30,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:21:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:21:30,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 869 transitions. [2022-12-13 19:21:30,716 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4909604519774011 [2022-12-13 19:21:30,716 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 869 transitions. [2022-12-13 19:21:30,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 869 transitions. [2022-12-13 19:21:30,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:30,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 869 transitions. [2022-12-13 19:21:30,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:30,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:30,720 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:30,720 INFO L175 Difference]: Start difference. First operand has 106 places, 101 transitions, 256 flow. Second operand 3 states and 869 transitions. [2022-12-13 19:21:30,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 124 transitions, 508 flow [2022-12-13 19:21:30,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 124 transitions, 494 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 19:21:30,722 INFO L231 Difference]: Finished difference. Result has 108 places, 102 transitions, 256 flow [2022-12-13 19:21:30,722 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=108, PETRI_TRANSITIONS=102} [2022-12-13 19:21:30,723 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, 3 predicate places. [2022-12-13 19:21:30,723 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 102 transitions, 256 flow [2022-12-13 19:21:30,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.3333333333333) internal successors, (772), 3 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:30,723 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:30,723 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 19:21:30,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 19:21:30,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 19:21:30,925 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 19:21:30,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:30,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1644382566, now seen corresponding path program 1 times [2022-12-13 19:21:30,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:30,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160733848] [2022-12-13 19:21:30,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:30,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 19:21:30,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:30,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160733848] [2022-12-13 19:21:30,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160733848] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:30,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:21:30,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:21:30,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355460840] [2022-12-13 19:21:30,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:30,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:21:30,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:30,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:21:30,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:21:31,029 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 590 [2022-12-13 19:21:31,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 102 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:31,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:31,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 590 [2022-12-13 19:21:31,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:33,999 INFO L130 PetriNetUnfolder]: 24011/39761 cut-off events. [2022-12-13 19:21:34,000 INFO L131 PetriNetUnfolder]: For 1019/1019 co-relation queries the response was YES. [2022-12-13 19:21:34,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76664 conditions, 39761 events. 24011/39761 cut-off events. For 1019/1019 co-relation queries the response was YES. Maximal size of possible extension queue 1746. Compared 338445 event pairs, 20971 based on Foata normal form. 0/28534 useless extension candidates. Maximal degree in co-relation 76634. Up to 32792 conditions per place. [2022-12-13 19:21:34,215 INFO L137 encePairwiseOnDemand]: 585/590 looper letters, 115 selfloop transitions, 3 changer transitions 0/139 dead transitions. [2022-12-13 19:21:34,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 139 transitions, 566 flow [2022-12-13 19:21:34,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:21:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:21:34,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 874 transitions. [2022-12-13 19:21:34,218 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4937853107344633 [2022-12-13 19:21:34,218 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 874 transitions. [2022-12-13 19:21:34,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 874 transitions. [2022-12-13 19:21:34,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:34,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 874 transitions. [2022-12-13 19:21:34,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.3333333333333) internal successors, (874), 3 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:34,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:34,224 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:34,224 INFO L175 Difference]: Start difference. First operand has 108 places, 102 transitions, 256 flow. Second operand 3 states and 874 transitions. [2022-12-13 19:21:34,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 139 transitions, 566 flow [2022-12-13 19:21:34,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 139 transitions, 564 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:21:34,230 INFO L231 Difference]: Finished difference. Result has 107 places, 100 transitions, 256 flow [2022-12-13 19:21:34,230 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=107, PETRI_TRANSITIONS=100} [2022-12-13 19:21:34,231 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, 2 predicate places. [2022-12-13 19:21:34,231 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 100 transitions, 256 flow [2022-12-13 19:21:34,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:34,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:34,232 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:21:34,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 19:21:34,233 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 19:21:34,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:34,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1335322892, now seen corresponding path program 1 times [2022-12-13 19:21:34,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:34,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941529481] [2022-12-13 19:21:34,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:34,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:21:34,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:34,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941529481] [2022-12-13 19:21:34,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941529481] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:34,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543628550] [2022-12-13 19:21:34,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:34,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:34,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:34,299 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:34,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 19:21:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:34,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 19:21:34,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:21:34,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:21:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:21:34,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543628550] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:21:34,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:21:34,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 19:21:34,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563669400] [2022-12-13 19:21:34,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:21:34,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 19:21:34,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:34,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 19:21:34,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 19:21:34,434 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 590 [2022-12-13 19:21:34,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 100 transitions, 256 flow. Second operand has 13 states, 13 states have (on average 257.46153846153845) internal successors, (3347), 13 states have internal predecessors, (3347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:34,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:34,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 590 [2022-12-13 19:21:34,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:37,433 INFO L130 PetriNetUnfolder]: 24079/39961 cut-off events. [2022-12-13 19:21:37,433 INFO L131 PetriNetUnfolder]: For 1322/1322 co-relation queries the response was YES. [2022-12-13 19:21:37,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77822 conditions, 39961 events. 24079/39961 cut-off events. For 1322/1322 co-relation queries the response was YES. Maximal size of possible extension queue 1746. Compared 340151 event pairs, 22647 based on Foata normal form. 6/29187 useless extension candidates. Maximal degree in co-relation 77768. Up to 35439 conditions per place. [2022-12-13 19:21:37,674 INFO L137 encePairwiseOnDemand]: 587/590 looper letters, 74 selfloop transitions, 11 changer transitions 0/106 dead transitions. [2022-12-13 19:21:37,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 106 transitions, 462 flow [2022-12-13 19:21:37,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 19:21:37,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 19:21:37,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3162 transitions. [2022-12-13 19:21:37,681 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44661016949152543 [2022-12-13 19:21:37,681 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3162 transitions. [2022-12-13 19:21:37,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3162 transitions. [2022-12-13 19:21:37,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:37,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3162 transitions. [2022-12-13 19:21:37,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 263.5) internal successors, (3162), 12 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:37,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 590.0) internal successors, (7670), 13 states have internal predecessors, (7670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:37,695 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 590.0) internal successors, (7670), 13 states have internal predecessors, (7670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:37,695 INFO L175 Difference]: Start difference. First operand has 107 places, 100 transitions, 256 flow. Second operand 12 states and 3162 transitions. [2022-12-13 19:21:37,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 106 transitions, 462 flow [2022-12-13 19:21:37,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 106 transitions, 456 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:21:37,743 INFO L231 Difference]: Finished difference. Result has 122 places, 106 transitions, 334 flow [2022-12-13 19:21:37,743 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=334, PETRI_PLACES=122, PETRI_TRANSITIONS=106} [2022-12-13 19:21:37,744 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, 17 predicate places. [2022-12-13 19:21:37,744 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 106 transitions, 334 flow [2022-12-13 19:21:37,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 257.46153846153845) internal successors, (3347), 13 states have internal predecessors, (3347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:37,744 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:37,744 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:21:37,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 19:21:37,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 19:21:37,946 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 19:21:37,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:37,947 INFO L85 PathProgramCache]: Analyzing trace with hash 43035692, now seen corresponding path program 2 times [2022-12-13 19:21:37,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:37,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598325354] [2022-12-13 19:21:37,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:37,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:21:38,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:38,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598325354] [2022-12-13 19:21:38,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598325354] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:38,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:21:38,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:21:38,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567978937] [2022-12-13 19:21:38,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:38,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:21:38,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:38,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:21:38,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:21:38,286 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 590 [2022-12-13 19:21:38,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 106 transitions, 334 flow. Second operand has 5 states, 5 states have (on average 233.6) internal successors, (1168), 5 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:38,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:38,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 590 [2022-12-13 19:21:38,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:40,237 INFO L130 PetriNetUnfolder]: 15331/25309 cut-off events. [2022-12-13 19:21:40,237 INFO L131 PetriNetUnfolder]: For 776/776 co-relation queries the response was YES. [2022-12-13 19:21:40,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49666 conditions, 25309 events. 15331/25309 cut-off events. For 776/776 co-relation queries the response was YES. Maximal size of possible extension queue 934. Compared 204449 event pairs, 468 based on Foata normal form. 1072/20579 useless extension candidates. Maximal degree in co-relation 49588. Up to 19667 conditions per place. [2022-12-13 19:21:40,384 INFO L137 encePairwiseOnDemand]: 570/590 looper letters, 183 selfloop transitions, 7 changer transitions 0/204 dead transitions. [2022-12-13 19:21:40,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 204 transitions, 926 flow [2022-12-13 19:21:40,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:21:40,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:21:40,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1597 transitions. [2022-12-13 19:21:40,387 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45112994350282487 [2022-12-13 19:21:40,387 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1597 transitions. [2022-12-13 19:21:40,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1597 transitions. [2022-12-13 19:21:40,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:40,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1597 transitions. [2022-12-13 19:21:40,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 266.1666666666667) internal successors, (1597), 6 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:40,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 590.0) internal successors, (4130), 7 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:40,392 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 590.0) internal successors, (4130), 7 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:40,392 INFO L175 Difference]: Start difference. First operand has 122 places, 106 transitions, 334 flow. Second operand 6 states and 1597 transitions. [2022-12-13 19:21:40,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 204 transitions, 926 flow [2022-12-13 19:21:40,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 204 transitions, 878 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-12-13 19:21:40,396 INFO L231 Difference]: Finished difference. Result has 118 places, 103 transitions, 331 flow [2022-12-13 19:21:40,396 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=118, PETRI_TRANSITIONS=103} [2022-12-13 19:21:40,396 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, 13 predicate places. [2022-12-13 19:21:40,397 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 103 transitions, 331 flow [2022-12-13 19:21:40,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 233.6) internal successors, (1168), 5 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:40,397 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:40,397 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:21:40,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 19:21:40,397 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 19:21:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:40,397 INFO L85 PathProgramCache]: Analyzing trace with hash 42487603, now seen corresponding path program 1 times [2022-12-13 19:21:40,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:40,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266433157] [2022-12-13 19:21:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:40,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:21:40,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:40,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266433157] [2022-12-13 19:21:40,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266433157] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:40,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23701288] [2022-12-13 19:21:40,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:40,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:40,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:40,466 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:40,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 19:21:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:40,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:21:40,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:40,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 19:21:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:21:40,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:21:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:21:40,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23701288] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:21:40,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:21:40,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-12-13 19:21:40,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718120970] [2022-12-13 19:21:40,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:21:40,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 19:21:40,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:40,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 19:21:40,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:21:40,834 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 590 [2022-12-13 19:21:40,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 103 transitions, 331 flow. Second operand has 8 states, 8 states have (on average 254.125) internal successors, (2033), 8 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:40,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:40,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 590 [2022-12-13 19:21:40,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:41,156 INFO L130 PetriNetUnfolder]: 1455/2762 cut-off events. [2022-12-13 19:21:41,156 INFO L131 PetriNetUnfolder]: For 873/873 co-relation queries the response was YES. [2022-12-13 19:21:41,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6291 conditions, 2762 events. 1455/2762 cut-off events. For 873/873 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 18023 event pairs, 0 based on Foata normal form. 315/2725 useless extension candidates. Maximal degree in co-relation 6234. Up to 1730 conditions per place. [2022-12-13 19:21:41,165 INFO L137 encePairwiseOnDemand]: 586/590 looper letters, 97 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2022-12-13 19:21:41,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 109 transitions, 497 flow [2022-12-13 19:21:41,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:21:41,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:21:41,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1354 transitions. [2022-12-13 19:21:41,167 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4589830508474576 [2022-12-13 19:21:41,167 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1354 transitions. [2022-12-13 19:21:41,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1354 transitions. [2022-12-13 19:21:41,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:41,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1354 transitions. [2022-12-13 19:21:41,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 270.8) internal successors, (1354), 5 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:41,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 590.0) internal successors, (3540), 6 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:41,171 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 590.0) internal successors, (3540), 6 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:41,171 INFO L175 Difference]: Start difference. First operand has 118 places, 103 transitions, 331 flow. Second operand 5 states and 1354 transitions. [2022-12-13 19:21:41,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 109 transitions, 497 flow [2022-12-13 19:21:41,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 109 transitions, 483 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-12-13 19:21:41,175 INFO L231 Difference]: Finished difference. Result has 79 places, 60 transitions, 189 flow [2022-12-13 19:21:41,176 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=189, PETRI_PLACES=79, PETRI_TRANSITIONS=60} [2022-12-13 19:21:41,176 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -26 predicate places. [2022-12-13 19:21:41,176 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 60 transitions, 189 flow [2022-12-13 19:21:41,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 254.125) internal successors, (2033), 8 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:41,177 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:41,177 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:21:41,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 19:21:41,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 19:21:41,378 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 19:21:41,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:41,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1334098826, now seen corresponding path program 1 times [2022-12-13 19:21:41,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:41,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943913159] [2022-12-13 19:21:41,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:41,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:21:41,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:41,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943913159] [2022-12-13 19:21:41,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943913159] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:41,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:21:41,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:21:41,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581240211] [2022-12-13 19:21:41,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:41,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:21:41,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:41,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:21:41,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:21:41,718 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 590 [2022-12-13 19:21:41,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 60 transitions, 189 flow. Second operand has 6 states, 6 states have (on average 231.33333333333334) internal successors, (1388), 6 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:41,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:41,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 590 [2022-12-13 19:21:41,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:41,980 INFO L130 PetriNetUnfolder]: 1484/2590 cut-off events. [2022-12-13 19:21:41,980 INFO L131 PetriNetUnfolder]: For 1055/1055 co-relation queries the response was YES. [2022-12-13 19:21:41,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5817 conditions, 2590 events. 1484/2590 cut-off events. For 1055/1055 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 15236 event pairs, 586 based on Foata normal form. 0/2297 useless extension candidates. Maximal degree in co-relation 5763. Up to 1672 conditions per place. [2022-12-13 19:21:41,988 INFO L137 encePairwiseOnDemand]: 584/590 looper letters, 71 selfloop transitions, 4 changer transitions 0/84 dead transitions. [2022-12-13 19:21:41,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 84 transitions, 401 flow [2022-12-13 19:21:41,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:21:41,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:21:41,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 985 transitions. [2022-12-13 19:21:41,990 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4173728813559322 [2022-12-13 19:21:41,990 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 985 transitions. [2022-12-13 19:21:41,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 985 transitions. [2022-12-13 19:21:41,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:41,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 985 transitions. [2022-12-13 19:21:41,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 246.25) internal successors, (985), 4 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:41,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 590.0) internal successors, (2950), 5 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:41,993 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 590.0) internal successors, (2950), 5 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:41,993 INFO L175 Difference]: Start difference. First operand has 79 places, 60 transitions, 189 flow. Second operand 4 states and 985 transitions. [2022-12-13 19:21:41,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 84 transitions, 401 flow [2022-12-13 19:21:41,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 84 transitions, 390 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-13 19:21:41,995 INFO L231 Difference]: Finished difference. Result has 80 places, 62 transitions, 205 flow [2022-12-13 19:21:41,995 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=80, PETRI_TRANSITIONS=62} [2022-12-13 19:21:41,996 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -25 predicate places. [2022-12-13 19:21:41,996 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 62 transitions, 205 flow [2022-12-13 19:21:41,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 231.33333333333334) internal successors, (1388), 6 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:41,996 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:41,996 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:21:41,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 19:21:41,997 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 19:21:41,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:41,997 INFO L85 PathProgramCache]: Analyzing trace with hash -587891437, now seen corresponding path program 1 times [2022-12-13 19:21:41,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:41,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879789040] [2022-12-13 19:21:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:41,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-13 19:21:42,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:42,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879789040] [2022-12-13 19:21:42,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879789040] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:42,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:21:42,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:21:42,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133638336] [2022-12-13 19:21:42,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:42,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:21:42,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:42,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:21:42,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:21:42,325 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 590 [2022-12-13 19:21:42,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 62 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:42,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:42,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 590 [2022-12-13 19:21:42,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:42,624 INFO L130 PetriNetUnfolder]: 1265/2230 cut-off events. [2022-12-13 19:21:42,624 INFO L131 PetriNetUnfolder]: For 446/446 co-relation queries the response was YES. [2022-12-13 19:21:42,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4915 conditions, 2230 events. 1265/2230 cut-off events. For 446/446 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 13028 event pairs, 88 based on Foata normal form. 0/2129 useless extension candidates. Maximal degree in co-relation 4860. Up to 1893 conditions per place. [2022-12-13 19:21:42,633 INFO L137 encePairwiseOnDemand]: 585/590 looper letters, 63 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2022-12-13 19:21:42,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 365 flow [2022-12-13 19:21:42,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:21:42,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:21:42,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 983 transitions. [2022-12-13 19:21:42,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41652542372881357 [2022-12-13 19:21:42,637 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 983 transitions. [2022-12-13 19:21:42,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 983 transitions. [2022-12-13 19:21:42,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:42,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 983 transitions. [2022-12-13 19:21:42,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 245.75) internal successors, (983), 4 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:42,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 590.0) internal successors, (2950), 5 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:42,642 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 590.0) internal successors, (2950), 5 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:42,642 INFO L175 Difference]: Start difference. First operand has 80 places, 62 transitions, 205 flow. Second operand 4 states and 983 transitions. [2022-12-13 19:21:42,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 365 flow [2022-12-13 19:21:42,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 74 transitions, 359 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:21:42,644 INFO L231 Difference]: Finished difference. Result has 78 places, 59 transitions, 198 flow [2022-12-13 19:21:42,645 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=78, PETRI_TRANSITIONS=59} [2022-12-13 19:21:42,645 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -27 predicate places. [2022-12-13 19:21:42,645 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 59 transitions, 198 flow [2022-12-13 19:21:42,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:42,645 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:42,645 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 19:21:42,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 19:21:42,646 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 19:21:42,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:42,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1061906122, now seen corresponding path program 1 times [2022-12-13 19:21:42,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:42,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372212581] [2022-12-13 19:21:42,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:42,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:21:42,664 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 19:21:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:21:42,679 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 19:21:42,679 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 19:21:42,680 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2022-12-13 19:21:42,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2022-12-13 19:21:42,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2022-12-13 19:21:42,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2022-12-13 19:21:42,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2022-12-13 19:21:42,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 50 remaining) [2022-12-13 19:21:42,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2022-12-13 19:21:42,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2022-12-13 19:21:42,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2022-12-13 19:21:42,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (40 of 50 remaining) [2022-12-13 19:21:42,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2022-12-13 19:21:42,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2022-12-13 19:21:42,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2022-12-13 19:21:42,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2022-12-13 19:21:42,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2022-12-13 19:21:42,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2022-12-13 19:21:42,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2022-12-13 19:21:42,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2022-12-13 19:21:42,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2022-12-13 19:21:42,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2022-12-13 19:21:42,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2022-12-13 19:21:42,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2022-12-13 19:21:42,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2022-12-13 19:21:42,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2022-12-13 19:21:42,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2022-12-13 19:21:42,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2022-12-13 19:21:42,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2022-12-13 19:21:42,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2022-12-13 19:21:42,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2022-12-13 19:21:42,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2022-12-13 19:21:42,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2022-12-13 19:21:42,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2022-12-13 19:21:42,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2022-12-13 19:21:42,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2022-12-13 19:21:42,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2022-12-13 19:21:42,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2022-12-13 19:21:42,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2022-12-13 19:21:42,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2022-12-13 19:21:42,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2022-12-13 19:21:42,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2022-12-13 19:21:42,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2022-12-13 19:21:42,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2022-12-13 19:21:42,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2022-12-13 19:21:42,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2022-12-13 19:21:42,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2022-12-13 19:21:42,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2022-12-13 19:21:42,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2022-12-13 19:21:42,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2022-12-13 19:21:42,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2022-12-13 19:21:42,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2022-12-13 19:21:42,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 19:21:42,685 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 19:21:42,685 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 19:21:42,685 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 19:21:42,722 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 19:21:42,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 389 transitions, 808 flow [2022-12-13 19:21:42,821 INFO L130 PetriNetUnfolder]: 110/759 cut-off events. [2022-12-13 19:21:42,821 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-12-13 19:21:42,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 759 events. 110/759 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3785 event pairs, 1 based on Foata normal form. 0/536 useless extension candidates. Maximal degree in co-relation 523. Up to 16 conditions per place. [2022-12-13 19:21:42,826 INFO L82 GeneralOperation]: Start removeDead. Operand has 337 places, 389 transitions, 808 flow [2022-12-13 19:21:42,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 337 places, 389 transitions, 808 flow [2022-12-13 19:21:42,833 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:21:42,833 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 337 places, 389 transitions, 808 flow [2022-12-13 19:21:42,833 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 337 places, 389 transitions, 808 flow [2022-12-13 19:21:42,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 389 transitions, 808 flow [2022-12-13 19:21:42,913 INFO L130 PetriNetUnfolder]: 110/759 cut-off events. [2022-12-13 19:21:42,913 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-12-13 19:21:42,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 759 events. 110/759 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3785 event pairs, 1 based on Foata normal form. 0/536 useless extension candidates. Maximal degree in co-relation 523. Up to 16 conditions per place. [2022-12-13 19:21:42,943 INFO L119 LiptonReduction]: Number of co-enabled transitions 87360 [2022-12-13 19:21:46,877 INFO L134 LiptonReduction]: Checked pairs total: 185201 [2022-12-13 19:21:46,878 INFO L136 LiptonReduction]: Total number of compositions: 348 [2022-12-13 19:21:46,879 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:21:46,879 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;@5b1f3e2e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:21:46,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2022-12-13 19:21:46,880 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2022-12-13 19:21:46,880 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:21:46,880 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:46,880 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 19:21:46,880 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-12-13 19:21:46,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:46,880 INFO L85 PathProgramCache]: Analyzing trace with hash 2367137, now seen corresponding path program 1 times [2022-12-13 19:21:46,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:46,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259553342] [2022-12-13 19:21:46,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:46,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:46,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:21:46,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:46,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259553342] [2022-12-13 19:21:46,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259553342] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:46,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:21:46,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:21:46,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048285156] [2022-12-13 19:21:46,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:46,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:21:46,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:46,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:21:46,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:21:46,901 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 737 [2022-12-13 19:21:46,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 178 transitions, 386 flow. Second operand has 3 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:46,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:46,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 737 [2022-12-13 19:21:46,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:23:03,899 INFO L130 PetriNetUnfolder]: 814387/1189069 cut-off events. [2022-12-13 19:23:03,899 INFO L131 PetriNetUnfolder]: For 5968/5968 co-relation queries the response was YES. [2022-12-13 19:23:05,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2263873 conditions, 1189069 events. 814387/1189069 cut-off events. For 5968/5968 co-relation queries the response was YES. Maximal size of possible extension queue 37502. Compared 11767099 event pairs, 784690 based on Foata normal form. 112799/895349 useless extension candidates. Maximal degree in co-relation 164829. Up to 1071103 conditions per place. [2022-12-13 19:23:09,771 INFO L137 encePairwiseOnDemand]: 682/737 looper letters, 97 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2022-12-13 19:23:09,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 126 transitions, 480 flow [2022-12-13 19:23:09,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:23:09,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:23:09,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1124 transitions. [2022-12-13 19:23:09,774 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5083672546359114 [2022-12-13 19:23:09,774 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1124 transitions. [2022-12-13 19:23:09,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1124 transitions. [2022-12-13 19:23:09,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:23:09,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1124 transitions. [2022-12-13 19:23:09,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:23:09,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 737.0) internal successors, (2948), 4 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:23:09,778 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 737.0) internal successors, (2948), 4 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:23:09,778 INFO L175 Difference]: Start difference. First operand has 135 places, 178 transitions, 386 flow. Second operand 3 states and 1124 transitions. [2022-12-13 19:23:09,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 126 transitions, 480 flow [2022-12-13 19:23:09,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 126 transitions, 480 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:23:09,782 INFO L231 Difference]: Finished difference. Result has 127 places, 126 transitions, 292 flow [2022-12-13 19:23:09,782 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=737, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=292, PETRI_PLACES=127, PETRI_TRANSITIONS=126} [2022-12-13 19:23:09,783 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, -8 predicate places. [2022-12-13 19:23:09,783 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 126 transitions, 292 flow [2022-12-13 19:23:09,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:23:09,783 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:23:09,783 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 19:23:09,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 19:23:09,783 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-12-13 19:23:09,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:23:09,783 INFO L85 PathProgramCache]: Analyzing trace with hash 73331221, now seen corresponding path program 1 times [2022-12-13 19:23:09,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:23:09,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117168364] [2022-12-13 19:23:09,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:23:09,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:23:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:23:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:23:09,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:23:09,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117168364] [2022-12-13 19:23:09,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117168364] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:23:09,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817883021] [2022-12-13 19:23:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:23:09,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:23:09,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:23:09,806 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:23:09,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 19:23:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:23:09,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:23:09,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:23:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:23:09,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:23:09,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:23:09,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817883021] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:23:09,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:23:09,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 19:23:09,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685453319] [2022-12-13 19:23:09,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:23:09,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:23:09,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:23:09,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:23:09,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:23:09,905 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 737 [2022-12-13 19:23:09,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 126 transitions, 292 flow. Second operand has 7 states, 7 states have (on average 324.2857142857143) internal successors, (2270), 7 states have internal predecessors, (2270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:23:09,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:23:09,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 737 [2022-12-13 19:23:09,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:24:27,617 INFO L130 PetriNetUnfolder]: 814387/1189072 cut-off events. [2022-12-13 19:24:27,617 INFO L131 PetriNetUnfolder]: For 5968/5968 co-relation queries the response was YES. [2022-12-13 19:24:29,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2263889 conditions, 1189072 events. 814387/1189072 cut-off events. For 5968/5968 co-relation queries the response was YES. Maximal size of possible extension queue 37502. Compared 11767357 event pairs, 784690 based on Foata normal form. 0/782553 useless extension candidates. Maximal degree in co-relation 2263875. Up to 1071103 conditions per place. [2022-12-13 19:24:34,052 INFO L137 encePairwiseOnDemand]: 734/737 looper letters, 97 selfloop transitions, 5 changer transitions 0/129 dead transitions. [2022-12-13 19:24:34,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 129 transitions, 508 flow [2022-12-13 19:24:34,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:24:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:24:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2043 transitions. [2022-12-13 19:24:34,057 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46200814111261873 [2022-12-13 19:24:34,057 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2043 transitions. [2022-12-13 19:24:34,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2043 transitions. [2022-12-13 19:24:34,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:24:34,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2043 transitions. [2022-12-13 19:24:34,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 340.5) internal successors, (2043), 6 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:24:34,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 737.0) internal successors, (5159), 7 states have internal predecessors, (5159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:24:34,064 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 737.0) internal successors, (5159), 7 states have internal predecessors, (5159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:24:34,064 INFO L175 Difference]: Start difference. First operand has 127 places, 126 transitions, 292 flow. Second operand 6 states and 2043 transitions. [2022-12-13 19:24:34,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 129 transitions, 508 flow [2022-12-13 19:24:34,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 129 transitions, 504 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 19:24:34,067 INFO L231 Difference]: Finished difference. Result has 134 places, 129 transitions, 324 flow [2022-12-13 19:24:34,068 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=737, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=324, PETRI_PLACES=134, PETRI_TRANSITIONS=129} [2022-12-13 19:24:34,068 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, -1 predicate places. [2022-12-13 19:24:34,068 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 129 transitions, 324 flow [2022-12-13 19:24:34,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 324.2857142857143) internal successors, (2270), 7 states have internal predecessors, (2270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:24:34,068 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:24:34,068 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 19:24:34,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 19:24:34,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:24:34,270 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-12-13 19:24:34,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:24:34,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1577624671, now seen corresponding path program 2 times [2022-12-13 19:24:34,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:24:34,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176624147] [2022-12-13 19:24:34,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:24:34,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:24:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:24:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:24:34,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:24:34,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176624147] [2022-12-13 19:24:34,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176624147] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:24:34,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114105354] [2022-12-13 19:24:34,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:24:34,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:24:34,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:24:34,319 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:24:34,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 19:24:34,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:24:34,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:24:34,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:24:34,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:24:34,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 19:24:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 19:24:34,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:24:34,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114105354] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:24:34,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:24:34,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2022-12-13 19:24:34,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954841944] [2022-12-13 19:24:34,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:24:34,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:24:34,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:24:34,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:24:34,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:24:34,480 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 737 [2022-12-13 19:24:34,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 129 transitions, 324 flow. Second operand has 3 states, 3 states have (on average 324.3333333333333) internal successors, (973), 3 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:24:34,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:24:34,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 737 [2022-12-13 19:24:34,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:25:56,939 INFO L130 PetriNetUnfolder]: 814563/1188671 cut-off events. [2022-12-13 19:25:56,939 INFO L131 PetriNetUnfolder]: For 5903/5903 co-relation queries the response was YES. [2022-12-13 19:25:59,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2264008 conditions, 1188671 events. 814563/1188671 cut-off events. For 5903/5903 co-relation queries the response was YES. Maximal size of possible extension queue 37623. Compared 11748460 event pairs, 516270 based on Foata normal form. 0/781944 useless extension candidates. Maximal degree in co-relation 2263972. Up to 1071482 conditions per place. [2022-12-13 19:26:03,781 INFO L137 encePairwiseOnDemand]: 733/737 looper letters, 123 selfloop transitions, 2 changer transitions 0/152 dead transitions. [2022-12-13 19:26:03,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 152 transitions, 620 flow [2022-12-13 19:26:03,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:26:03,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:26:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1092 transitions. [2022-12-13 19:26:03,785 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49389416553595655 [2022-12-13 19:26:03,785 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1092 transitions. [2022-12-13 19:26:03,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1092 transitions. [2022-12-13 19:26:03,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:26:03,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1092 transitions. [2022-12-13 19:26:03,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 364.0) internal successors, (1092), 3 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:26:03,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 737.0) internal successors, (2948), 4 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:26:03,789 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 737.0) internal successors, (2948), 4 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:26:03,789 INFO L175 Difference]: Start difference. First operand has 134 places, 129 transitions, 324 flow. Second operand 3 states and 1092 transitions. [2022-12-13 19:26:03,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 152 transitions, 620 flow [2022-12-13 19:26:03,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 152 transitions, 606 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 19:26:03,793 INFO L231 Difference]: Finished difference. Result has 136 places, 130 transitions, 324 flow [2022-12-13 19:26:03,793 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=737, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=136, PETRI_TRANSITIONS=130} [2022-12-13 19:26:03,793 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 1 predicate places. [2022-12-13 19:26:03,793 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 130 transitions, 324 flow [2022-12-13 19:26:03,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 324.3333333333333) internal successors, (973), 3 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:26:03,794 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:26:03,794 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 19:26:03,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 19:26:03,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6b67f2-2a12-466d-bcea-5b3fc95bb2c0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:26:03,995 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-12-13 19:26:03,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:26:03,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1577624670, now seen corresponding path program 1 times [2022-12-13 19:26:03,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:26:03,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439476437] [2022-12-13 19:26:03,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:26:03,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:26:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:26:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 19:26:04,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:26:04,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439476437] [2022-12-13 19:26:04,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439476437] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:26:04,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:26:04,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:26:04,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595809640] [2022-12-13 19:26:04,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:26:04,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:26:04,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:26:04,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:26:04,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:26:04,084 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 737 [2022-12-13 19:26:04,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 130 transitions, 324 flow. Second operand has 3 states, 3 states have (on average 321.3333333333333) internal successors, (964), 3 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:26:04,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:26:04,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 737 [2022-12-13 19:26:04,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand